Voip

Analog VoIP Media Gateways

VoIP Media Gateways come in two flavors: Digital VoIP and Analog VoIP.

With Analog VoIP transmission, electrical signals of different frequency and/or aptitude are transmitted continuously and variably. This is analog VoIP's principle feature. Analog VoIP information is also represented in wave forms.

Advantages of Analog VoIP Media

Advantages of an analog VoIP media approach include simplicity and better coverage than what one may find using a digital VoIP approach. Of note, then, in most environments digital VoIP transmissions would be converted back into an analog signal.

VoIP Media Gateway Modules

High density VoIP media gateway solutions come in module formats. VoIP Media Gateway modules provide integrated media gateway functionality, while delivering high port density in a mezzanine card form.

A standards-based VoIP media gateway module can enable an OEM to bring many VoIP media gateway applications to market faster, with less risk and lower development cost.

VoIP Call Control Modules

Media gateway modules feature, for example, call control protocol functionality – in particular, progress tones and generic tone detection. In addition, VoIP messaging and VoIP security (applied to media streams and signaling) are common supported services.

The MediaPack™ Series Analog VoIP Gateways are cost-effective, cutting-edge technology solutions. These stand-alone analog VoIP Gateway subsystems provide superior voice technology for connecting legacy telephone or fax equipment and PBX systems with IP-based telephony networks, as well as for integration with new IP-based PBX architecture.

The MediaPack Series Analog VoIP Gateways are well-suited for commercial VoIP deployment. Field-proven voice and fax technology and feature-rich design makes the MP series an excellent solution for various emerging VoIP applications. The MediaPack series Analog VoIP Gateways are used in the voice VPN environment, centralized IVR and Quality Monitoring, calling card and pay phone markets. Ideal markets also include MTU (Multi Tenant Units), rural areas and remote analog extensions in a VoIP-based PBX or IP-PBX architecture.

Deliver Feature-Rich Solutions:

The Media Pack Series Analog VolP Gateways are second generation products that have been designed to meet real market needs. In addition to superior voice technology, the products provide advanced telephony features such as long haul, metering, country dependent MWI and CID for true integration with existing telephony infrastructure. The MP Series is based on VolPerfect architecture, AudioCodes' underlying, best-of-breed, core media gateway technology for all of its products.

Part Number Description

AudioCodes MP-104/FXS/AC/SIP-3/N3 MediaPack Analog Media VoIP Gateway - 4 channels - FXS Interface - SIP Gateway

AudioCodes MP-108/FXS/AC/SIP-3/N3 MediaPack Analog Media VoIP Gateway - 8 channels - FXS Interface - SIP Gateway

AudioCodes MP-124/FXS/AC/SIP-3/N3 MediaPack Analog Media VoIP Gateway - 24 channels - FXS Interface - SIP Gateway

AudioCodes MP-104/FXO/AC/SIP-3/N3 MediaPack Analog Media VoIP Gateway - 4 channels - FXO Interface - SIP Gateway

AudioCodes MP-108/FXO/AC/SIP-3/N3 MediaPack Analog Media VoIP Gateway - 8 channels - FXO Interface - SIP Gateway

AudioCodes MP-104/FXS/AC/H323-3/N3 MediaPack Analog Media VoIP Gateway - 4 channels - FXS Interface - H.323 Gateway

AudioCodes MP-108/FXS/AC/H323-3/N3 MediaPack Analog Media VoIP Gateway - 8 channels - FXS Interface - H.323 Gateway

AudioCodes MP-124/FXS/AC/H323-3/N3 MediaPack Analog Media VoIP Gateway - 24 channels - FXS Interface - H.323 Gateway

AudioCodes MP-104/FXO/AC/H323-3/N3 MediaPack Analog Media VoIP Gateway - 4 channels - FXO Interface - H.323 Gateway

AudioCodes MP-108/FXO/AC/H323-3/N3 MediaPack Analog Media VoIP Gateway - 8 channels - FXO Interface - H.323 Gateway

Audiocodes product family is based on AudioCode's' field-proven carrier class and best-of-breed VoIP technology. Featuring 2, 4, 8 or 24 analog ports, the gateways connect analog terminals, PBXs or key systems to the IP network using FXO or FXS connectivity.

Compliant with multiple protocols including SIP, H.323, MGCP and MEGACO, the Analog Media Gateways enable flexible deployment and interoperability for the evolving next generation networks. Using AudioCodes' Analog Media Gateways, Network Equipment Providers and System Integrators can effectively deliver carrier-hosted converged services as well as enterprise-based applications.

The MediaPack™ Analog Media Gateway product family is based on AudioCodes' field-proven and best-of-breed VoIP technology. Featuring 2, 4, 8 or 24 analog ports, the gateways connect analog terminals, PBXs or key systems to the IP network using FXO or FXS connectivity. Compliant with multiple protocols including SIP, H.323 and MGCP, the Analog Media Gateways enable flexible deployment and interoperability for the evolving next generation networks. Using AudioCodes' Analog Media Gateways, Network Equipment Providers and System Integrators can effectively deliver carrier-hosted converged services as well as enterprise-based applications.

Tags : Analog Voip,Analog Voip Media, Analog VOIP media Gateways , VOIP Analog Media, Gateways Voip, Media gateways

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Advantages of VoIP

Advantages of VoIP : What are the advantages to VoIP?

Let’s run down a brief overview of the principal VOIP advantages

VoIP has lots of advantages over a regular phone service.

One of the main advantages of VoIP is the low cost. If you have a fast Internet connection (DSL or cable) you can make PC-to-PC phone calls anywhere in the world for free. If you wish to make a PC-to-phone connection, however, there's usually a charge for this but probably much cheaper than your regular phone service.

You pick up the receiver, which sends a signal to the ATA.

The phone number data is sent in the form of a request to your VoIP company's call processor. The call processor checks it to ensure that it's in a valid format.

You finish talking and hang up the receiver.

When you hang up, the circuit is closed between your phone and the ATA.

The ATA sends a signal to the soft switch connecting the call, terminating the session.

You can also sign up with a VoIP service provider which charges a monthly fee in return for unlimited calls within a certain geographic area. For example, some VoIP services in the United States allow you to call anywhere in North America at no extra charge. Overseas calls are charged at a relatively small rate.

Another advantage of VoIP is portability. You can make and receive phone calls wherever there is a broadband connection simply by signing in to your VoIP account. This makes VoIP as convenient as e-mail – if you are travelling, simply pack a headset or Internet phone and you can talk to your family or business associates for almost nothing.

When you are using a PSTN line, you are charged for the time you are connected to that carriers network. The longer you stay connected, the more that you pay. With VoIP you are using either a public or private network and thus do not have any time related call charges. In addition, VoIP can be used to connect more than two people for a call, allowing you to talk to many people at the same time.

An international phone. A VoIP phone does not have country boundaries. You can take it with you wherever you go. And the same rates apply regardless of where you are when you use it.

There are many other features that make VoIP attractive. Call forwarding, call waiting, voicemail, caller ID and three-way calling are some of the many services included with Internet telephone at no extra charge. You can also send data such as pictures and documents at the same time you are talking on the phone.

3-way calling, call forwarding, callback services and caller ID are usually standard features (free) with VoIP companies. Those are normally charged extra for, by the traditional telecommunication companies (telcos) .

Huge Savings

Imagine being able to keep your current phone number and make as many long distance calls as you wish (within a certain area) for one low price. No more fluctuating phone bills, outrageous long distance charges, or other surcharges that repeatedly shows up on your bill. Voice over IP offers just that. Just as email changed how people communicate, so too will VoIP.

Disadvantages of VoIP

With all this going for it, it's a wonder that anybody still uses regular phone services. However, there are a few disadvantages to VoIP. Continuous service during a power outage and emergency calls are two of the biggest problems.

The disadvantages of VOIP can be annoying, but are relatively limited for the consumer. The main complaints regarding VOIP have to do with providing the level of quality of service that customers are accustomed to with regular telephone technology.

First of all, VoIP is dependant on wall power. Your current phone runs on phantom power that is provided over the line from the central office. Even if your power goes out, your phone (unless it is a cordless) still works. With VoIP, no power means no phone. A stable power source must be created for VoIP.

Because VoIP uses an Internet connection, it's susceptible to all the hiccups normally associated with home broadband services. All of these factors affect call quality:

Latency

Jitter

Packet loss

Phone conversations can become distorted, garbled or lost because of transmission errors. Some kind of stability in Internet data transfer needs to be guaranteed before VoIP could truly replace traditional phones

VoIP is susceptible to worms, viruses and hacking, although this is very rare and VoIP developers are working on VoIP encryption to counter this.

During a blackout a regular phone is kept in service by the current supplied through the phone line. This is not possible with Internet phones, so when the power goes out, there is no VoIP phone service. One solution to this problem is to use battery backups or power generators to provide electricity.

Given the growth and increasing popularity of VoIP, it seems that all these disadvantages will be overcome in time. Now is the time that the major service providers – isp’s and telcoms – are using their formidable resources to work through the VoIP bugs. It is estimated that as soon as 2007 most of the kinks will be ironed out and VoIP should receive widespread consumer acceptance.

All these voip disadvantages will be overcome in time. There is a tremendous amount of work being done to increase the reliability and usefulness of VoIP. By 2007 most of the kinks will be worked out and VoIP will receive widespread consumer acceptance.

Overall, the disadvantages of VOIP aren't significant enough to dissuade the average consumer from using the technology; especially with the fact that they know that the calls they are making are free. But we can rest assured that the technology will only get more reliable as time goes by.

The disadvantages of VOIP are usually tolerable if the callers are using a free service and the calls are for individual, personal communication. But once a network of users, such as a business, wants to use VOIP, the problems become a little more complicated. Part of the reason is that most networks have a firewall; and most firewalls don't know how to route a VOIP call once it is received - which phone does it go to?

Lack of emergency reliability and clarity are also two of the major disadvantages. Sometimes echo is heard on the phone so it becomes difficult for us to understand what we are speaking and for the front person as to what are we saying.

There are a few disadvantages to VoIP. Some of these are being addressed by ISPs and VoIP providers, while others are likely to remain.

Tags : Advantages of VoIP , What are the advantages to VoIP? , Voip Advantages

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UNIVERSE ON VOIP Universe Telecom’s IP PBX is a completely integrated unified communications platform for businesses looking to stay ahead of the technology curve. We offer comprehensive VoIP business phone system solutions.

Universe Telecom phone systems were specifically designed for the needs of small businesses and branch offices having from 10 to 100 employees.

Universe Telecom VoIP phone system features are delivered on a singe server – which make our systems easy to install, use, and manage. More importantly, it provides your business with most complete and cost effective IP phone system available.

Tags : UNIVERSE ON VOIP , UNIVERSE of VOIP , voip universe, universe means voip

Small Business Voip

Small Business VoIP

Small companies are increasingly choosing Voice over Internet Protocol (VoIP) hosted business phone packages, like Packet8 Virtual Office, instead of conventional telephone systems. VoIP can mean a lot more than just savings to a small business. The greater versatility of hosted VoIP system allows each business to tailor a telecommunications package, regardless of geography, specifically to meet its needs without spending heavily on equipment, installation, maintenance or an IT staff.

Packet8 Virtual Office is an affordable, robust and easy-to-manage phone solution with all the premium PBX features and functionality of a traditional telecom system. All that's needed is a broadband connection and Packet8 VoIP phone service to create a low cost, high feature, professional telephone system for companies with as few as three employees in the same office, region or spread across the globe.

With over 20 years of telecommunications experience and more than 68 multimedia and VoIP technology patents, Packet8 is regarded as one of the VoIP industry's most respected and admired service providers.

Increasing Business Value with VoIP
Businesses are in a constant struggle to control overhead. VoIP, along with the IP telephony capabilities it enables, is a technology that offers small- and medium-sized businesses a range of solutions that can lower telecommunications costs and, in many cases, enhance productivity. Additionally, using VoIP will allow these businesses to take advantage of future application development.

There are reliable retail VoIP services, multi-line business products, VoIP PBX systems, as well as fax services. Packages as low as USD 24 per month to unlimited calling internationally to Canada, Europe, and other countries are some of the many advantages of VoIP services. 1888voipservices brings online holistic VoiP services; providers, software, hardware, accessories and more at the most competitive rates. VoIP uses the power of the internet to bring reliable and affordable phone services worldwide.

Small Business VoIP Options
VoIP (Voice over Internet Protocol) represents the latest in phone system technology. With it, regular voice calls are sent over a computer network instead of traditional phone lines. There are two main types of VoIP to consider.

Small business VoIP systems
Small business VoIP dealers replace your existing phone system with new hardware. Instead of using separate phone lines, calls are sent over your internal network. While these systems offer many potential benefits, they're not a guaranteed way to save money.

Small business VoIP service
A small business VoIP system will not reduce charges for calls outside the company network, though. To do that, you should turn instead to small business VoIP service. With VoIP service, your calls are sent over the Internet as data until they near their destination, then converted back and transmitted on regular phone lines.

Small Business VoIP Solutions
Voice over IP (VoIP) systems are the answer to reliable, cost effective small business voice and fax communications needs. There has never been a higher quality, lower priced technology for intra-office and external voice and fax communications until now. You will be astonished at the savings you receive on your local and long distance telephone calls. You will be impressed by the stability and superior quality provided by Velocity Networks VoIP solutions, geared to the specific needs of small business customers. You will never need another telephone or Internet service provider again with the Velocity Network full lineup of feature-rich communications solutions.

Small Business VoIP provides an array of convenient features that allow access to all stored information from any location using an easy to use web-based management system.

Small Business VoIP Solutions:
Work with broadband technology
Completely replace your need for a separate business telephone provider
Can be integrated with your current internet solution
Are offered at a flat rate monthly cost

Tags : Small Business VoIP Solutions

Disclaimer: On this page, we have tried to list all the major information on Small Business VoIP Solutions. We have tried our best to provide accurate and updated details about Small Business VoIP Solutions. However, if you encounter any discrepancy, do write to us. We welcome any kind of feedback that would improve the quality of the site, a site that strives to provide the best information on Small Business VoIP Solutions.

voip software

VOIP Software

Voice over IP (VoIP) software is used to conduct telephone-like voice conversations across IP based networks. For residential markets, VOIP phone service is often cheaper than traditional PSTN phone service and can remove geographic restrictions to telephone numbers (i.e. have a "New York" PSTN phone number in Tokyo).

VoIP is a cost effective solution to your telephony needs. It allows you to make cheap calls to anyone, anywhere in the world using your PC or a VoIP Phone handset. What's more, calls between VoIP lines are free. To confirm which VoIP SIP software will meet your needs, we strongly recommend you just download and try it. You don't have to purchase to download and our software's small file size means it only take a couple of seconds to download and install.

VoIP Software : Skype
Cost: Free

Skype is a proprietary peer-to-peer internet telephony (VoIP) network, founded by Niklas Zennström and Janus Friis, the creators of KaZaA. The Skype Group is headquartered in Luxembourg with offices also in London and Tallinn.

VoIP Software : Google Talk
Cost: Free

Google Talk is a service developed by Google for instant messaging (IM) that also allows for PC to PC audio conversations. Google Talk beta was released on August 24, 2005 and consists of both a service and a client used to connect to the service. Unlike some other instant messaging services, Google Talk uses an open protocol (Jabber) for the IM part and it encourages the use of clients other than their own in connecting to the Google Talk service.

cisco voip Cisco Systems , Cisco VoIP

University dumps Cisco VoIP for open-source Asterisk

The south Texas school is boldly moving thousands of users off a Cisco VoIP platform to an open-source VoIP network based on Asterisk.

Cisco Systems, Inc. is the worldwide leader in networking for the Internet. Cisco IP telephony products are a key component of the Cisco Unified Communications system, which delivers the business benefits of a converged network to organizations of all sizes. Cisco IP telephony products support a wide breadth of Session Initiation Protocol (SIP) capabilities. This network provides a secure foundation optimized for data, wireless, and IP Communications, and includes the ability to support IP-to-IP gateways for easy and cost-effective connectivity between independent voice-over-IP (VoIP) networks and analog phone gateways using your existing phone equipment.

Cisco VoIP Products: Cisco CP-7906G, Cisco CP-7914, Cisco CP-7936, Cisco CP-7936-PWR-KIT, Cisco CP-7940G, Cisco CP-7940G Open Box, Cisco CP-7941G, Cisco CP-7941G Open Box, Cisco CP-7960G, Cisco CP-7960G Refurb, Cisco CP-7961G, Cisco CP-7970G, Cisco CP-DOUBLEFOOTSTAND, Cisco CP-PWR-CUBE, Cisco CP-PWR-CUBE2, Cisco CP-PWR-CUBE3, Cisco CP-PWR-CUBE3 10Pack, Cisco CP-SINGLEFOOTSTAND,

Do you use a Cisco VoIP solution?

Cisco VoIP Telephony Solution
Product Description:
The Cisco VoIP system is composed of Cisco IP phones, a Cisco Call Manager, a Cisco Unity voicemail server and a Cisco voice gateway router to connect the VoIP system to the public switched telephone network (PSTN). The goal of the VoIP system is to provide telephony services over an IP network which is also used to interconnect the distinct elements of the VoIP system.

CISCO VOIP GATEWAY AND ACCESS SERVERS

The Cisco VOIP Gateway converts TDM traffic from the Public Switched Telephone Network (PSTN) into either H.323- or Session Initiation Protocol (SIP)-based VoIP traffic. Gateways are considered intelligent endpoints, and can provide billing, alarming, built-in interactive voice response (IVR), routing, digit manipulation, and security.

Manufacturer/Vendor/Distributor: Cisco Systems, Inc.
Level 1,
18 & 20 Brindabella Circuit
Canberra International Airport ACT 2609
Contact:Tony Hall
Federal Security Policy Systems Engineer
Sales / Channels
Phone: +61 2 6216 0647
Mobile: +61 401 890 577
Fax: +61 2 6247 3422
Email: anthhall@cisco.com
Web: www.cisco.com

CyberTech Launches Gateway Selective Recording for Cisco VoIP

CyberTech International, a global provider of advanced voice and data recording technologies, has announced Gateway Selective Recording for Cisco VoIP networks.

Tags : Cisco Systems , Cisco VoIP , Cisco VoIP Gateways , cisco voip certification , cisco voip qos , cisco voip solution , cisco voip configuration , Cisco VoIP Telephony Solution , Cisco VoIP PBX

VoIP Tariff MTNL Cuts VoIP Tariffs, Most Destinations Rs 1.00 per Minute.

India's State-run telecommunication company, MTNL slashed international call rates to Rupees one per minute (US 2.6 cents) for its Voice Over Internet Protocol (VoIP) customers. This rate covers call rates to about 100 countries such as Saudi Arabia, Pakistan, Japan, Malaysia and Kuwait. Call rates to US, UK, Canada, Australia, Singapore and Hong Kong are already stand at Rs one minute.

wireless VoIP The Hardware Zone has reviewed the new Jabra GN9350, a dual function wireless headset which combines both landline and VoIP in a single package with very good wireless range.
The GN9350 main features include the ability to be linked to a PC for VoIP connections while also connected to the landline for your normal phone calls. Switching between the PC audio and the telephone line is as simple as pressing a button on the base station or the headset (though the headset only allows you to switch to the telephone line and not back).

Transitions between the telephone line and PC audio were smooth with only a slight pause between switches. The Jabra headset also provides connectivity for Digital Enhanced Cordless Telecommunication (DECT) phones which must be paired to the base station. Another function that is advertised but which we were unable to test since we were only provided with one headset, is the conference call function. The GN9350 allows up to 4 headsets to be set up in conference mode for conference calls. The GN9350 also boasts of a wireless range of up to 300ft (91.4m). Walls may restrict the signal somewhat but testing done around the office gave a decent range from which to roam about.

VoIP systems "InfoWorld tests upwards of 200 IT products every year, and we see many, many good ones," said Doug Dineley, InfoWorld's Test Center executive editor. "Our Technology of the Year award winners represent not only the cream of the crop, but the best products in the most important product categories. From the top AJAX development tools and SOA middleware to the best blade servers and VoIP systems, these are the products at the leading edge of IT."
Mark Spencer, creator of Asterisk and Digium's chief technology officer, commented: "The InfoWorld Technology of the Year 2008 award is an enormous acknowledgement of the work and success of the worldwide Asterisk community. Asterisk wouldn't be in a position to rival some of the biggest vendors of proprietary voice technology today if it weren't for the inherent strength of open source and dedication of the community of developers."

iPhone VoIP GoIP International launches an iPhone VoIP in a Box platform with highly advanced VoIP services, as a complete private label solution As the iPhone is expected to be sold in 70 countries before New Year, GoIP International has during the past many months created an amazing VoIP product for the growing iPhone success. Estimated market is currently over 10 million iPhone 2G and 3G users, which is expected to grow to up towards 45 million users at end of 2009 according to analyst PiperJaffray. Currently Apple produces 800.000 new iPhone devices weekly.
The iPhone has already revolutionized the way we use mobile communication. GoIP International sees a great growth potential for service providers to offer their own complete iPhone VoIP service as an add-on to their existing telecommunication portfolio, or needs a stand-alone solution to enter into the new wave of advanced communication services.
GoIP’s iPhone “VoIP in a Box” platform enables Telecom Service Providers to offer a set of unique VoIP services to iPhone users. The unique services includes, free calling between iPhone users, VoIP calls via Wi-Fi, location based service access, utilizing the built in GPS, using existing mobile number as caller ID on outbound VoIP calls, auto top-up of account, controlling multiple rate plans, multilingual front- & backend system.

VoIP SP1 Although no one knew it is broken, Microsoft is fixing it. I think it's policy of first release then fix attitude from other solutions has been carried over to VoIP solutions as well. But don't worry, it is not entire VoIP they are fixing, it a feature update to its Response Point VoIP phone system for small businesses. Yes I also had to say phew!.

Microsoft has announced plans to release a feature update to its Response Point VoIP phone system for small businesses as a Service Pack. The SP 1 will be available this summer as a free download.

Response Point SP1 will help small businesses move from analog phone service to VoIP without the need for technical expertise. The upgraded solution features a VoIP account setup wizard in the Response Point Administrator for quick and easy scalability. It also allows businesses to select a local phone number for use in remote locations.

VoIP Blocking As VoIP business users in countries like Dubai are being blocked. Many users are turning to VPN solutions to allow the ability to use VoIP and get around the current blocking issue. This however is an expensive and unnecessary solution as SpeedVoip Technology able to resolve this issue. SpeedVoIP has released a betyter solution for Voip Blocking called VGCP (VoiceGuard Control Protocol) .

1. Overview

Yahoo messenger, Skype, Microsoft Messenger and Vonage offer a subscriber the ability to "call" someone using Softphone/Gateway ATA/IPPhone/IAD. However, several ISPs are blocking or degrading this service in order to force a consumer to use a ISP sponsored service. States such as the UAE block this technology outright while US corporations, such as Clearwire, claim that they might degrade the quality of competing services by adding choppy and delayed services.
SpeedVoIP is a leader in circumventing VoIP blocking imposed by ISP or Telco. For vision of Net Neutrality, VoiceGuard @ is created to address a growing number of ISPs who either degrade or block voice services over their networks. VoiceGuard @ gives choice back to the subscribers or customers of ITSP.

2. Technology

VGCP(Voice Guard Control Protocol)
VGCP is a proprietary layer 2 link protocol working at between IP stack and nic driver for VoIP anti-blocking. The core patent-pending VGCP is industry’s most state-of-the-art voice service provider class security protocol whose scalability and flexibility results in not to compromise voice quality and overhead. VGCP controls and monitors full voice signaling and media flow intelligently, meanwhile disguises sip and rtp packets into normal allowed data packets such as DNS and TFTP, and makes two-way encryption and decryption driven by user-customized policy. VGCP is fully transparent to upper SIP proxy or UA which means VoiceGuard can work with any 3rd-party Softphone/ATA/Gateway/IPPhone/IADs and SIP proxy or server not like some competitors which take effect on their own device and softswitch.

SidePass
Due to unique architecture, when deploying VoiceGuard Border Controller(VGBC) at customer CPE side, VGBC can work in the way similar to that of soho router, but it only encrypts and decrypts SIP and RTP packets on link layer, not to handup these packets to IP stack for forwarding while bypassing other data packets originating from SIP terminals. In this scenario, peak throughput and minimal CPU overhead can be easily achieved.

TrafficDisturb
Current leading carrier-class VoIP blocking platform such as NarusInsight can detect VoIP traffic with a special algorithm“traffic classification in the dark” which filters VoIP traffic based on behavioral-signature model. Compared with previous one of payload-signature model, NarusInsight is more sophisticated and robust. After deep study into traffic behavior of SIP UA, Proxy and Registrar, VoiceGuard can real-time incorporate light-weight traffic for puzzling and bypassing VoIP blocking system without consuming more bandwidth and compromising voice quality. Even in some circumstance, VoiceGuard can simulate traffic behavior of universal data networking protocol such as OICQ, MSN and so on.

3. Key Features

Maximum call completion rate and maximum voice service duration
SIP core standards and a variety of drafts supported
Proprietary link layer protocol for controlling
Any 3rd-party Softphone/ATA/Gateway/IPPhone/IAD and SIP Proxy/Registrar/SBC supported
The most comprehensive codec including g.711/g.723/g.729ab/iLBC/gsm/speechX supported
Bypassing Narus and Verso platform detection
Flexible user-customized encryption policy driven
Strict call path protection and security up to termination
Only simultaneous signaling/media/T.38 fax packet support across any firewall.
No network or firewall modification is required.
Excellent voice quality without any latency and performance compromise
Small footprint terminal SDK .
Available on all major platforms.

VoIP Backup I read about backup for VoIP on a leading Magazine today. One of the backups it suggest is that to keep the good old copper wires, PSTN, and that is what I am doing, at office, home office and home.
They also suggested and I also have UPS backups fro my routers, DSL routers and VoIP switches.
Our Asterisk Servers are protected and our VoIP Phones, a mixture of Cisco, Linksys, Astra, Avaya and Grandstream phones also protected by UPS, over POE.
I even have a Solar Power system at Home and home office. System runs well with most of the time sending excess power to the grid.
But with all these systems, I have lost VoIP service, in two incidents when we lost power in the area, we lost our phone service. But our office and home was well lit.
Why? because the central switch (Belong to service provider) that our DSL service came from also lost power. So only service we had was good old POTS service, and our cell phones, iPhones.
I do not have cable service but I am not sure if they also connect to central switches. And if they do, it will be the same picture, your area loose power, you get no VoIP.
So make sure that you have at least one pots line with a old type phone and well charged cell phone.

VoIP weaknesses VoIP weaknesses
As the saying goes, there's no such thing as a free lunch. While the savings offered by VoIP services make them very attractive, there are some other factors that need to be considered before jumping aboard.

The first is call quality. Because VoIP calls travel over the Internet rather than the telephone network, they have to compete with a lot of other traffic. The performance of computer networks is affected by the amount of data travelling over them, so when things are busy, delivery delays can occur. Sometimes data packets can get lost altogether as they try to find their way to their destination.

For VoIP calls, such delays and losses cause drops in call quality. Words might sound clipped or the connection may drop out for fraction of a second. In worst cases, calls are all but unintelligible. However, many of the major VoIP service providers are working to interconnect their own networks. This will help to keep call traffic away from the public Internet and so improve call quality.

You'll also need a decent broadband connection. Many VoIP providers recommend using nothing slower than a 512 kbps download/128kbps upload link. Anything below this can have an adverse effect on call quality.

Also, because you need a broadband connection to make and receive calls, you also need power. If there is a blackout, you'll lose your service. The traditional phone network has been designed to operate without main power, but this isn't the case with a VoIP service. Mind you, this power limitation also applies to cordless landlines that are popular in many Australian households.

It's also worth remembering that VoIP calls are treated like any other type of broadband usage by your ISP. Calculations vary, but as a rough guide, each 10 minutes of talking will eat up 1MB of your download quota. Anyone with a small monthly cap will need to pay close attention to their usage.

VoIP and Cable Companies VoIP and Cable Companies
If anyone is in a position to win the Telecommunication wars, it's the cable companies. Massive consolidation in the cable industry has led to huge privately owned networks that in many cases make it unnecessary to route calls over the public Internet. Quality of Service issues can be handled in house, and after all, companies like Cisco Systems pretty much built the Internet and are largely responsible for the development of Voice over IP Telephony.

Cable companies as VoIP service providers have the ability to bundle voice with high speed data and digital cable TV, and are even now running introductory offers of all three for 99.00 a month in some markets. But be careful, introductory offers end and VoIP plans with the cable companies are some of the most expensive to be had.

While VoIP service providers like Comcast and Time Warner generally receive good reviews for sound quality, monthly calling plans cost $40.00 and $45.00 respectively. Not bad when looking at a $70.00 phone bill from Bell South, but over twice as much as a pure-play VoIP service provider. No doubt, a good reliable broadband connection through a cable modem is the ideal VoIP solution (wireless notwithstanding), but you don't have to use your cable company for VoIP.

VoIP numbering system VoIP numbering system
While the prospect of being able to take your phone number with you when you travel is attractive, this feature of VoIP also raises some challenges. For example, emergency services rely on what's called the Integrated Public Number Database (IPND) to locate callers based on their phone number. If that number no longer relates to a physical location, emergency calls can be compromised.

With this in mind, the Australian Communications and Media Authority (ACMA) has introduced a new location-independent numbering range and is encouraging VoIP service providers to use it. Under the system, any numbers that don't relate to a particular physical location will start with the prefix 0550. This will alert both emergency services and other callers to the fact that they are calling or being called from a VoIP service.

The system is currently voluntary for VoIP providers, however ACMA says it will be monitoring usage closely to ensure compliance.

Peer to Peer VoIP

Peer to Peer VoIP

The least expensive VoIP solution would be using a computer on a peer to peer network. Offered from such VoIP service providers as Skype or the Gizmo Project, the software is free to download and calls within the network are free worldwide. Calls to PSTN numbers are charged at a low VoIP rate, and in the case of Skype, at a low yearly rate. Peer to Peer VoIP is a software solution, meaning that no ATA is required, and your phone is a pair of earplugs and a microphone plugged into your computer. The downside is that call quality is lacking compared to some of the hardware VoIP solutions available.

Establishing a Peer-to-Peer VoIP Call

A peer-to-peer VoIP call occurs when two VoIP phones communicate directly over IP without IP PBXs between them. A peer-to-peer call can be initiated directly, by calling a phone’s SIP URI, or indirectly by dialing a phone number. A peer-to-peer call will only be established when a phone number is dialed if both phones share an IP PBX. For an audio call, there is no difference (in end user experience) between a peer-to-peer call and one that uses an IP PBX.

However, peer-to-peer calls become important if callers use features like push-to-talk, video, and mesh-based audio conferencing. The VoIP versions of these features cannot be transmitted over PSTN. The features can only be used in peer-to-peer VoIP calls.

VoIP has been called a few different things in its colourful past such as internet telephony, peer-to-peer, P2P, IP telephony, broadband telephony, voice over broadband and many, many other names. At Skype we much prefer using the simpler term free calls over the internet than the geeky VoIP.

Another Skype competitor

Here is another competitor to Skype in the peer to peer VoIP world -- called Peerio it appears to have a number of advantages over Skype... with a few caveats though.

An Experimental Study of the Skype Peer-to-Peer VoIP System

Skype's peer-to-peer overlay, and the network workload generated by Skype users. Third, we provide data on user-behavior that can be used for future design and modeling of peer-to-peer VoIP networks; note that developing an explicit quantitative model is out of scope of the present paper. Altogether, we find evidence that Skype is fundamentally different from the peer-to-peer networks studied in the past.Supernode-based peer-to-peer networks organize participants into two layers: supernodes, and ordinary nodes. Such networks have been the subject of recent research in [29, 28, 6, 5]. Typically, supernodes maintain an overlay network among themselves, while ordinary nodes pick one (or a small number of) supernodes to associate with; supernodes also function as ordinary nodes and are elected from amongst them based on some criteria. Ordinary nodes issue queries through the supernode(s) they are associated with.Many peer-to-peer networks handle churn by dynamically restructuring the network through periodic or reactive maintenance traffic. Churn has been studied extensively in peer-to-peer file-sharing networks [26, 27, 2, 13, 7]; the consensus is that churn can be high.

Future Work
We have only scratched the surface of understanding how peer-to-peer supports VoIP. More generally, interactive applications such as peer-to-peer web-caching, VoIP, instant messaging, games etc. may demonstrate different characteristics than P2P file-sharing networks and we are interested in understanding these differences. Measuring existing interactive networks including instant messaging networks (AIM, MSN, Yahoo!) and massively multiplayer game networks (World of Warcraft, Ultima Online) can reveal different user behavior. In addition, it would be useful to compare user experience, call setup latency and call quality in Skype and other infrastructure-based telephony services including traditional telephone and cellular networks, and VoIP networks that use SIP and H.323 for signaling. Combined, these would give insights about how peer-to-peer networks for such applications should be built and provisioned.

Overall, we present measurement data useful for designing and modeling a peer-to-peer VoIP system. Even though this data is limited due to the proprietary nature of Skype, we believe that this study could server as a basis for further understanding and discussing the differences between peer-to-peer file-sharing and peer-to-peer VoIP systems.

VoIP Technology for SIP Peer-To-Peer :

Fusion believes its new "efonica" branded softphone and uniquely configured VoIP network will provide significant advantages over most VoIP peer-to-peer networks. Fusion's technology eliminates the method of routing utilized by many VoIP peer-to-peer networks, in which many users' Internet bandwidth and/or PCs are utilized as part of the carrier's larger network to set up calls for thousands of other users. DSP technology for peer-to-peer Internet calls is one of several differentiators behind Fusion's new VoIP offering, expected to be launched worldwide this quarter", remarked Matthew Rosen, Fusion's President and CEO.

Comments ::::::::::::::

I saw a demo of another enterprise peer-to-peer system in UK recently- from a Canadian company called Nimcat Networks. Awesome. They are backed by some big players. I think peer-to-peer is the future of business VoIP.

Reasons for Choosing VOIP Voice over IP (VoIP) was developed in order to provide access to voice communication in any place around the world. In most places, voice communication is quite costly. Consider making a phone call to a person living in a country half the globe away. The first thing you think of in this case is your phone bill! VoIP solves this problem and many others.

There are of course a few drawbacks attached to the use of VoIP, as is the case with any new technology, but the advantages largely outbalance these. Let's explore below the benefits of VoIP and see how it can improve your home or business voice communication.

If you don’t use VoIP for voice communication, then you are most certainly using the good old phone line (PSTN – Packet-Switched Telephone Network). On a PSTN line, time is really money. You actually pay for each minute you spend communicating on the phone. International calls are much more expensive. Since VoIP uses the Internet as backbone, the only cost you have when using it is the monthly Internet bill to your ISP. Of course you need broadband Internet access, like ADSL, with a decent speed. In fact, unlimited 24/7 ADSL Internet service is what most people use today, and this causes your monthly cost to be of a fixed amount. You can speak as much as you wish on VoIP and the connection cost will still be the same.
Studies have shown that, compared to using a PSTN line, using VoIP can potentially make you save up to 40 % on local calls, and up to 90 % on international calls.

More than two persons
On the phone line, only two persons can speak at a time. With VoIP, you can setup a conference with a whole team communicating in real time. VoIP compresses data packets during transmission, and this causes more data to be handled over the carrier. As a result, more calls can be handled on one access line.

Cheap user hardware and software
If you are an Internet user wishing to use VoIP for voice communication, the only additional hardware you require besides your computer and Internet connection are a sound card, speakers and a microphone. These are quite cheap. There exist several software packages downloadable from the Internet, which you can install and use for the purpose. Examples of such applications are the well-known Skype and Net2Phone. You do not actually need a telephone set, which can be quite expensive, along with the underlying equipment, especially when you have a phone network.

VoIP Providers that Offer VoIP Gaming Globe7
Globe7 is a free downloadable software that converts your PC into a second telephone to make free PC to PC calls. This product is a SIP-based VoIP soft phone, which...

Jajah
JAJAH's primary service, JAJAH Web, takes an approach called web-activated telephony, using VoIP to connect traditional phone lines (land or mobile). Founded by Austrians Roman Scharf and Daniel Mattes in...

Skype
Niklas Zennström and Janus Friis created Skype in 2003. Available in 28 languages and used in almost every country around the world, this little piece of technology can connect anyone...

Gaming Voip VoIP gaming allows voice over IP telephony during gameplay, which may be a healthy or unhealthy experience depending upon the players involved. The reason behind this rationale is that gamers no longer need to switch between screens or type in text messages as they talk into headsets while hunting down their gaming opponents. Therefore, VoIP gaming allows gamers full immersion into the task at hand. While this ability to fully concentrate is beneficial for a team to coordinate and launch attacks, VoIP gaming also allows users to more fully insult the opponent without interruption.

How It Works
VoIP on systems such as XBOX 360 and PlayStation 3 has made multiplayer games more interactive, cohesive for teams or clans, and especially vigorous with the ability to concentrate on the game without anything more than a VoIP subscription service. Usually, the gaming capabilities are built in, and all the user needs is a headset and microphone to get active. While many games that integrate with VoIP are in their infancy, the hope among gamers is that gaming will fully mature along with VoIP services.

For many gamers, the ability to avoid text messages during a game is vital for faster hands-free action, as any instructions or motivations for the game can be made verbally through VoIP. On the other hand, it has become difficult for females to pass for males and vice versa as is often done through virtual gaming, as the voice feature will reveal a gender in many cases.

Finally, the real advantage behind VoIP gaming is that it allows gamers the ability to play games with more personalized connections without the cost of long-distance calls to players located throughout the world. This ability makes VoIP gamers some of the largest bandwidth-intensive users in the world. On the upside, if networks can learn to conserve more bandwidth with intense compression, then gamers can pat themselves on the back for helping evolve technologies that will help people collaborate more effectively in online learning environments.

Small Business VoIP

WiFi VoIP

Changing the Face of Communication: Wifi Meets VOIP

The Internet revolution is now being felt in voice communication. Now anybody in the world can talk without using a real phone. They may even be able to use a pocket pc WiFi phone. A technology called "voice over Internet protocol" (VOIP) has made these things possible. VOIP combined with wireless technology can truly provide an amazing experience with WiFi VOIP phones.

VOIP started with the so-called "soft-phone," software that needs to be installed on a computer that has a broadband

Need for Wireless (WIFI VOIP)
As new technology is introduced, people try to find ways to adapt the new technology to their current activities. VOIP phones are no exception. When people realized the benefits of VOIP, the need for wireless VOIP phones increased. Having a wireless device allows total flexibility and mobility, not to mention an inexpensive way of making calls.

The first WiFi VOIP phones manufactured are specific to a particular service. One example is the Netgear WiFi phone for Skype. As its name implies, the phone is only for Skype users who need to make calls even when they are not in front of the computer. Another example is the Vonage WiFi phone, which is obviously made just for Vonage VOIP subscribers.

Netgear WiFi Phone for Skype
The Netgear WiFi phone is designed especially for Skype users. The phone is ideal for heavy Skype users, those who use Skype as their main mode of business or personal communication, or just about anybody who uses Skype most of the time.

Vonage WiFi Phone
The Vonage WiFi phone is a UTStarcom F1000 model and is quite small in size which makes it handy. The Vonage WiFi Phone can make calls to any other VOIP phones or any ordinary phones in the areas covered within the user's subscription. The phone also works well with any wireless hotspots anywhere in the world, open or secured.

Other than that, the Vonage WiFi phone acts like the ordinary mobile phones in that the user can select ring tones, has a phone book, can set speed dialing, and call log access.

Future of WiFi VOIP Phones
WiFi VOIP phones seem to have a promising future. By 2005, there were about 4.5 million subscribers to VOIP in the U.S. alone. The Asian market also has a wide acceptance of the technology, projecting $10 billion revenue by 2009. These statistics can surely motivate manufacturers to improve and enhance the features of wireless VOIP phones. Whether the unit is a dedicated VOIP phone or a pocket pc WiFi phone, the advantages of WiFi phone service outweigh the limitations.

Mobile Voip on Nokia Wi-fi Mobiles Launched

Mobile calls between Tpad users are free worldwide if the calls are routed over their WiFi Connection. All other PSTN calls from the user's WiFi mobile to any other landline or mobile in the world will be charged at the usual low Tpad VoIP rates.

The 411 on Wifi VoIP Phones

There is no disputing the perks of wifi phones. By combining the freedom of wireless connections with the benefits of VoIP, these portable devices grant users greater mobility, typically at reduced prices compared to standard telephone services.

Vertically Challenged

But the smooth handoff of calls between wifi and mobile networks is not without its fair share of challenges. For starters, not all vertical businesses are well suited to enterprise wifi phones. "For most enterprises, wifi phones don’t make a ton of sense. Do you really need to have your phone strapped to your belt all the time? Today’s stand-alone wifi VoIP phones are really targeted at certain industries where they can make a difference.”Nor are all wifi phones equipped for corporate America. “The truth is the lower-priced wifi phones aren’t really enterprise-ready,” said Tauschek, citing Skype Ltd.’s wifi phones as a prime example.

VoIP Meets WiFi
The advances of VoIP and Internet telephony in general have come a long way since their inception. Most recently, the "next big thing" has been to merge Wi-Fi with VoIP, producing one of the oddest acronyms you'll ever see. VoWiFi. VoWiFi, or Voice over Wireless Fidelity, simply means a Wi-Fi based VoIP service — or in even more general terms, a wireless based VoIP system.

Along with added benefits to business and those with a need for wireless communications, VoWiFi also opens up the door for a whole new market of consumer products such as a standalone VoWiFi handheld. Many cellular phone companies such as Nokia and Motorola have already announced dual-mode cellular phones that will support seamless roaming from WiFi to cellular networks when WiFi is unavailable to a caller. That is one of the biggest challenges facing VoWiFi — roaming access. A WiFi access point offers a communication range of up to 90 meters (commonly called a hotspot), and continuous conversations would mean that the caller must stay within an area of overlapping hotspots, or as already suggested, have a VoWiFi dual-mode phone that would switch to a regular cellular phone transmission when the caller moves out of a hot spot range.

Wireless VoIP Phone Packages

The BroadVoice WiFi VoIP Phone is available with any BroadVoice Unlimited rate plan. When ordered with BroadVoice Internet Phone Service, the Wifi VoIP Phone is just $99.95 (regular price $139.95).

Works with any WiFi (802.11b/g) compatible wireless access point
Simple installation (WiFi Phone Installation Instructions)
Weights just 0.24 lbs and pocket sized!
Compatible with most BroadVoice calling features

Voip Prices Growing number of companies, from start-ups to giants such as AT&T, are pitching VoIP (Voice over Internet Protocol) as a cheaper alternative to traditional service carried over a 100-year-old infrastructure by companies including SBC Communications and Verizon Communications.

"While in most countries migration towards VoIP resulted in price reductions, in India, VoIP is still struggling to find itself a role. That is particularly so because prices have already hit rock bottom"

Voice-Over-Internet-Protocol (VoIP) service prices are not expected to drop any further, says Unwired Ltd general manager John Pollock.

Mr Pollock was commenting on another player Kidanet entering the VoIP market this week.

Mr Pollock said Unwired offered prices 70 per cent below the traditional pricing. He said the VoIP market was confused with all the deals that were on offer.

"There is no doubt that once people fully investigate the benefits of VoIP they will adopt the service," Mr Pollock said.

Prices: The switching space in India is a highly competitive market, with prices of TDM switches hitting rock bottom. Though VoIP equipment are just getting deployed in India, they compete with TDM switches. Thus, TDM switch prices play a significant role in price determination of VoIP equipment. And VoIP vendors targeting India have not had the buffer of a new market when it comes to price competitiveness. VoIP equipment prices are calculated for every unit of port equivalent to every DSO circuit or line in the case of TDM switches. Per port prices of VoIP gateways during fiscal 2002–03 varied from Rs 4,500–7,000 ($90–150), depending on the size of deployment.

VoIP provider VoicePulse has a $15-a-month plan for unlimited local calling, while 8x8 offers unlimited dialing to any phone in the United States and Canada for $20 a month.

The dropping prices are also affecting the higher-quality services that VoIP providers now sell to smaller businesses, a crucial market for any provider hoping to wedge its way into the world of corporate spending. Smaller companies are nimbler in terms of technology and are usually the first to try cutting-edge gear. Six weeks ago, Vonage dropped the price for its business plan from $60 to $45 a month. That matches a similar offering from VoicePulse and other providers.

How low can you go?It's unclear how far VoIP companies can go in cutting prices further.

Others said they believe prices will likely stabilize following the latest round of cuts, but said there may be room to cut prices again down the road.

VoIP Gateways

VoIP Gateways

What is a VoIP Gateway?

A VOIP gateway is a device which converts telephony traffic into IP for transmission over a data network. VOIP gateways are available as external units or as PCI cards. VoIP gateways act as VoIP network translators and mediators.

VoIP gateway comes with the ability to support at least two T1/E1 digital channels. Most VoIP gateways feature at least one Ethernet and telephone port. Controlling a gateway can be done with the help of the various protocols like MGCP, SIP or LTP. VoIP gateways can also help direct VoIP calls to specific users with the assistance of built-in routing tables.

Types of VOIP gateways
1. Analog units: Analog units are used to connect regular analog phone lines to it. Analog units are available for between 2-24 lines.

2. Digital units: Digital units allow you to connect digital lines either one or more BRI ISDN lines (Europe), one or more PRI/E1 lines (europe) or one or more T1 lines (USA).

Benefits of VoIP Gateways
The main advantage of VoIP gateway is that it can provide connection with your existing telephone and fax machines through the traditional telephone networks, PBXs, and key systems. This makes the process of making calls over the IP network familiar to VoIP customers.

VoIP gateways can end a call from the telephone and can provide user admission control using IVR (Interactive Voice Response) system and provide accounting records for the call. Gateways also help direct outbound calls to a specific destination, or can end the call from another gateway and send the call to the PSTN.

VoIP gateways plays a major role in enhancing carrier services and also supports the simplicity of the telephone calls for less cost and easy access. Flexible call integration has been developed at less cost which enables programmable call progress tones and distinctive ring tones.

The software is standards compliant and can be used for building both FXS-only Analog Telephone Adapters as well as FXS/FXO gateways and FoIP gateways targeted towards SOHO and Residential markets. HelloGateway has been proven on different hardware platforms and operating systems and tested for interoperability with different SIP based PSTN gateways and FoIP gateways.

VOIP gateway manufacturers
There are lots of VOIP gateways available today, and as demand has increased drastically, prices have decreased considerably. Analog VOIP gateways start at as little as $200. Here are a few VOIP gateway manufacturers:

Patton electronics: http://www.patton.com/
Audiocodes: http://www.audiocodes.com/
Vegastream: http://www.vegastream.com/
Mediatrix: http://www.mediatrix.com/

Functions of VoIP Gateways

The main functions of VoIP gateways include voice and fax compression or decompression, control signaling, call routing, and packetization. VoIP gateways are also power packed with additional features such as interfaces to external controllers like Gatekeepers or Softswitches, network management systems, and billing systems.

The Essential Guide to VoIP Gateways

VoIP gateway serves a very practical purpose. It is a network device that converts voice and fax calls into digital packets — and vice versa — in real time, between the traditional PSTN (public switched telephone network) and an IP network. These packets are compatible with a company’s VoIP system. By performing functions such as voice and fax compression, decompression, packetization, call routing and control signaling, a VoIP gateway enables the data infrastructure to handle voice and other applications. Without a proper gateway, users on a VoIP network cannot make or receive calls to and from outsiders using traditional phone lines.

Future of VoIP Gateway Technology
Besides the connectivity performance, VoIP also offers better reliability under a variety of circumstances.
VoIP gateways according to the latest architectures to meet the changing demands of service providers, corporate network clients, and individual carriers.

SmartNode and SmartLink VoIP telephony solutions are more than just talk. These VoIP gateway, VoIP router, & VoIP telephony solutions really work. Over seven years running Patton engineering has been developing and refining SmartNode VoIP technology. And Patton puts our advanced VoIP technology into every SmartNode VoIP router and VoIP gateway we make.

SmartNode offers VoIP gateway and VoIP router solutions with virtually every VoIP telephony interface, including ISDN PRI & BRI, T1, E1, FXS, FXO, and more. Plus SmartNode supports SIP, H.323, and MGCP VoIP technologies. That means SmartNode VoIP technology solutions will fit your network.

VoIP Routers

VOIP Routers
Network Routers: A network router joins two computer networks together. DSL and cable modem routers are often used in homes and small businesses, while other types of network routers are also used on the Internet.

DVG-1402S Broadband Phone Service VoIP Router

D-Link introduces the DVG-1402S Broadband Phone Service VoIP Router. The DVG-1402S is designed for businesses or homes that want to take advantage of Internet connectivity and Voice Over IP using a single gateway.

The DVG-1402S Broadband Phone Service VoIP Router enables standard phones to be used for voice calls over the Internet. Telephone calls made over the Internet (VoIP) maximizes your broadband investment and is a cost-effective way to make phone calls. Enjoy low-cost long-distance calling with the DVG-1402S.

Analog VoIP Routers
SmartLink 4020 Series Analog VoIP SoHo Router
SmartNode™ 4520 Series Analog VoIP Router with up to 8 FXS/FXO ports
SmartNode™ 4830 Series Analog VoIP IAD with up to 8 FXS/FXO ports and integrated WAN connectivity
SmartNode™ 4900 Series IpChannelBank™ Multi-Port FXS/FXO Analog VoIP Gateway Router with up to 32 ports

Digital VoIP Gateways
SmartNode™ 4554 ISDN BRI PSTN Gateway
SmartNode™ S-DTA ISDN BRI VoIP Gateway

Digital VoIP Routers
SmartNode™ 4552 SoHo VoIP Router for ISDN/BRI (2 channels)
SmartNode™ 4562 Secure ISDN VoIP and VPN
SmartNode™ 4630 Series Multiport BRI So Gateway Router (up to 8 channels)
SmartNode™ 4650 ADSL Multiport ISDN VoIP IAD with ADSL2+ Interface
SmartNode™ 4650 G.SHDSL Multiport ISDN VoIP IAD with G.SHDSL.bis Interface
SmartNode™ 4960 G.SHDSL Multiport PRI VoIP IAD with G.SHDSL.bis Interface
SmartNode™ 4960/61 T1/E1/PRI VoIP IAD
SmartNode™ S-DTA ISDN BRI VoIP Gateway

ATA or Router?
Choosing Between an ATA and a Router for Your VoIP Network

Many people considering VoIP as a communication solution get confused about whether to use an ATA (Analog Telephone Adapter) or a router for deploying VoIP at home or their office. Let us see where to use what.

First, we need to make it clear that an ATA and a router are different in their functions and capabilities.

An ATA does not provide you Internet access. It only gets your voice ready to be transmitted over the Internet, by converting the analog voice signals into digital data signals and subsequently fragmenting this data into packets. The packet contains important information about its destination, along with the voice data. When an ATA receives packets, it does the contrary: it reassembles the packets and converts them back to analog voice signals which are fed to your phone.

Top 5 VoIP Wireless Routers

Linksys WRT54G
Belkin Wireless Pre-N
Buffalo Smart Router WHR G54-S
Netgear WGR826V
D-Link DI-624M Super G

The H.323 VoIP

The H.323 VoIP

The H.323 VoIP standard is most widely used but lacks the features necessary to completely replace existing telephone systems. Because it offers only basic telephony functions, handsets and other devices need more complex and expensive circuitry. The MGCP, or Media Gateway Control Protocol, was created to simplify standards and reduce the cost of these devices. SIP, or Session Initiation Protocol (recommended by the Internet Engineering Taskforce), is another standard now gaining a strong following.

How it H.323 Works

An H.323 terminal is an endpoint in a LAN that participates in real-time two-way communications with another H.323 terminal, gateway, or multipoint control unit (MCU). H.323 endpoints are grouped together in zones, and each zone has one gatekeeper that manages all the endpoints in that zone. Each terminal must support audio communication, but they also can support audio with video, audio with data, or a combination of these capabilities.

H.323 can be referred to as “intelligent endpoint protocol,” which means that all the intelligence required to locate the remote endpoint and to establish media streams between the local and the remote device is an integral part of this protocol. “Device control protocols” are complementary to H.323, and those current protocols are H.248 and MGCP.

Basic Usage
To understand how H.323 is used, it helps to understand how the gateway works. In VoIP, the gateway usually is a device that offers an IP interface on one side and some sort of legacy telephone interface on the other side.gateways were viewed as monolithic devices that had call control provided by H.323 (or SIP) and hardware required to control the PSTN interface.

The H.323 gateway can provide an interface between H.323 and a PSTN, but it also can provide an interface between H.320, V.70, H.324 and other speech terminals. H.323 uses CODECs to convert between circuit-switched and packet formats, and works with the gatekeeper through RAS protocols to route signals from voice and fax through the network.

VoIP Equipment in the Future

VoIP Equipment in the Future

Given the range of possible applications and all the different standards, flexibility is the key to a successful VoIP product design. Evolving standards require that equipment can be updated easily. At Patton Electronics, our range of VoIP products meet this challenge and our free software updates ensure the future of an investment in our equipment.

VoIP traffic has seen tremendous growth, especially in the long-distance segment, making next-generation carriers (Nextgens) strong market drivers as they expanded into regions with low teledensity. New analysis from Frost & Sullivan, World VoIP Equipment Forecast Update, QJ, 2001, reveals this industry generated revenues of $1.39 billion in 2000...

Tips on Buying VoIP Equipment

Switching to VoIP phone system require the purchase of VoIP equipment, which is a huge investment. Therefore, a proper planning is required to avoid making a wrong decision.

Not to buy used equipment for VoIP
The technology behind VoIP equipment is developing so fast that even last year’s hardware is tremendously outdated. Moreover, you will also have to pay for the installation fee which is notably a portion of the price, so better opt for new one.

Get ready for future growth
It is advisable for you to include extra capacity at the beginning of a project for future growth than to add more VoIP equipment later as the cost for the former is less.

Check on the VoIP equipment vendor
Try to opt for licensed and authorized vendors as they are able to conta

Keep the administrator documentation and passwords
Administrator documentation and passwords are needed for making admin changes to the VoIP phone system.

VoIP Technology

VoIP Technology

VoIP is a technology that allows users to talk, chat or make calls using the Internet.

Voice Over IP Technology made its first stepping stone when internet came into picture however 1995 was the year when VOIP was noticed by the maximum people. It has helped various business houses and individual into various ways like cutting costs, cheap communication, globalization and transparency.

VOIP Technology when made its big splash was expensive however over period of time it has become cheap due to competition and its use. It help company’s in saving money by lowering taxes and surcharges also advantages can be gained over various circuit switching.

VoIP uses packet switching, a network technology not used by the standard landline system. Packet switching makes VoIP calls cheaper and often free. If you have a good VoIP provider and your Internet connection is great, you will have the same quality of calls similar to landline calls. VoIP enable audio communications via IP networks. Not surprisingly, an industry based on VoIP has been created over time. VoIP software is being sold online. Telephone and mobile services are adopting VoIP as an additional service feature.

VoIP technology is the crux of many operations from voice-chat software to full-blown IP network-based telecommunications. Investing in VoIP opens the door to various revenue streams. The difference between this technology fro the conventional landline phone setup is the cost of maintenance. Setting up and maintaining VoIP service is cheaper for providers. To a large extent, the consumers of VoIP are already paying for their broadband connection. Since VoIP uses the Internet, service providers do not have to pay as much as they would for a regular landline service.

There are different types of VoIP Technology calling some of them are mentioned below.

ATA (Analog Telephone Adaptor) this adaptor enables us to make use of standard telephone for VoIP options, it actually allows to connect phone that is already at our home to our computer internet connection .ATA converts analog signal to digital signal, that can be easily transmitted through internet.

The next type of calling is through IP phones; they look just like our normal phones with same buttons. This only difference is they replace old style wall jack connector with Ethernet connectors, so it gets plugged directly into the router.

The most common type of calling is from computer-to-computer. This is the simplest and cheapest way to use VoIP. These calls are entirely free, only thing you need software that you can download from Internet, a broadband or DSL connection, microphone, speaker and sound card.

The latest technology that is emerging in the market and gaining popularity is Wi-Fi phones. This hybrid-Phone let people make connections using a local wireless Internet access point seamlessly switch over to a cell network whenever necessary.

Types of VoIP Service

Types of VoIP Service

PC to PC
PC to PC VoIP is a software-based service. It is a free service. PC to PC VoIP allows people using their computers to place calls to each other for free. Of course, you both need to be using your computer in order to place the call.

PC to phone and vice versa
PC to phone VoIP is a software-and-hardware-based service. It allows you to use your PC to call a landline or mobile phone. This type of VoIP does not come for free, however, but the rates are considerably lower.

Phone to phone
Phone to phone VoIP is a hardware-based service. For phone to phone VoIP, the caller and the call recipient can use their phones to call each other using the Internet. VoIP converts audio sounds into data packets and transfers these packets over the Internet. The packets would then travel from one open router to another following the built-in packet address. Once the packets reached the call recipient, they would be converted back to audio sounds.

Disadvantages of VOIP

Disadvantages of VoIP

With all this going for it, it's a wonder that anybody still uses regular phone services. However, there are a few disadvantages to VoIP. Continuous service during a power outage and emergency calls are two of the biggest problems.

The disadvantages of VOIP can be annoying, but are relatively limited for the consumer. The main complaints regarding VOIP have to do with providing the level of quality of service that customers are accustomed to with regular telephone technology.

First of all, VoIP is dependant on wall power. Your current phone runs on phantom power that is provided over the line from the central office. Even if your power goes out, your phone (unless it is a cordless) still works. With VoIP, no power means no phone. A stable power source must be created for VoIP.

Because VoIP uses an Internet connection, it's susceptible to all the hiccups normally associated with home broadband services. All of these factors affect call quality:
Latency
Jitter
Packet loss

Phone conversations can become distorted, garbled or lost because of transmission errors. Some kind of stability in Internet data transfer needs to be guaranteed before VoIP could truly replace traditional phones

VoIP is susceptible to worms, viruses and hacking, although this is very rare and VoIP developers are working on VoIP encryption to counter this.

With all this going for it, it's a wonder that anybody still uses regular phone services. However, there are a few disadvantages to VoIP. Continuous service during a power outage and emergency calls are two of the biggest problems.

During a blackout a regular phone is kept in service by the current supplied through the phone line. This is not possible with Internet phones, so when the power goes out, there is no VoIP phone service. One solution to this problem is to use battery backups or power generators to provide electricity.

Given the growth and increasing popularity of VoIP, it seems that all these disadvantages will be overcome in time. Now is the time that the major service providers – isp’s and telcoms – are using their formidable resources to work through the VoIP bugs. It is estimated that as soon as 2007 most of the kinks will be ironed out and VoIP should receive widespread consumer acceptance.

All these voip disadvantages will be overcome in time. There is a tremendous amount of work being done to increase the reliability and usefulness of VoIP. By 2007 most of the kinks will be worked out and VoIP will receive widespread consumer acceptance.

Overall, the disadvantages of VOIP aren't significant enough to dissuade the average consumer from using the technology; especially with the fact that they know that the calls they are making are free. But we can rest assured that the technology will only get more reliable as time goes by.

The disadvantages of VOIP are usually tolerable if the callers are using a free service and the calls are for individual, personal communication. But once a network of users, such as a business, wants to use VOIP, the problems become a little more complicated. Part of the reason is that most networks have a firewall; and most firewalls don't know how to route a VOIP call once it is received - which phone does it go to?

Lack of emergency reliability and clarity are also two of the major disadvantages. Sometimes echo is heard on the phone so it becomes difficult for us to understand what we are speaking and for the front person as to what are we saying.

There are a few disadvantages to VoIP. Some of these are being addressed by ISPs and VoIP providers, while others are likely to remain.

Advantages of VoIP

Advantages of VoIP : What are the advantages to VoIP?

Let’s run down a brief overview of the principal VOIP advantages

VoIP has lots of advantages over a regular phone service.

One of the main advantages of VoIP is the low cost. If you have a fast Internet connection (DSL or cable) you can make PC-to-PC phone calls anywhere in the world for free. If you wish to make a PC-to-phone connection, however, there's usually a charge for this but probably much cheaper than your regular phone service.

You pick up the receiver, which sends a signal to the ATA.

The phone number data is sent in the form of a request to your VoIP company's call processor. The call processor checks it to ensure that it's in a valid format.

You finish talking and hang up the receiver.

When you hang up, the circuit is closed between your phone and the ATA.

The ATA sends a signal to the soft switch connecting the call, terminating the session.

You can also sign up with a VoIP service provider which charges a monthly fee in return for unlimited calls within a certain geographic area. For example, some VoIP services in the United States allow you to call anywhere in North America at no extra charge. Overseas calls are charged at a relatively small rate.

Another advantage of VoIP is portability. You can make and receive phone calls wherever there is a broadband connection simply by signing in to your VoIP account. This makes VoIP as convenient as e-mail – if you are travelling, simply pack a headset or Internet phone and you can talk to your family or business associates for almost nothing.

When you are using a PSTN line, you are charged for the time you are connected to that carriers network. The longer you stay connected, the more that you pay. With VoIP you are using either a public or private network and thus do not have any time related call charges. In addition, VoIP can be used to connect more than two people for a call, allowing you to talk to many people at the same time.

An international phone. A VoIP phone does not have country boundaries. You can take it with you wherever you go. And the same rates apply regardless of where you are when you use it.

There are many other features that make VoIP attractive. Call forwarding, call waiting, voicemail, caller ID and three-way calling are some of the many services included with Internet telephone at no extra charge. You can also send data such as pictures and documents at the same time you are talking on the phone.

3-way calling, call forwarding, callback services and caller ID are usually standard features (free) with VoIP companies. Those are normally charged extra for, by the traditional telecommunication companies (telcos) .

Huge Savings

Imagine being able to keep your current phone number and make as many long distance calls as you wish (within a certain area) for one low price. No more fluctuating phone bills, outrageous long distance charges, or other surcharges that repeatedly shows up on your bill. Voice over IP offers just that. Just as email changed how people communicate, so too will VoIP.

VOIP Seminar | Seminar on Voip

Seminar on VOIP

In Voip Seminar We have to Discuss about following Topics.....

Voip Seminar : Defination
Voip Seminar : How Voip works
Voip Seminar : Features of Voip
Voip Seminar : Advantages of Voip
Voip Seminar : DisAdvantages of Voip

Full Details About VOIP Seminar :

VoIP - definition:
VoIP stands for Voice over Internet Protocol

VoIP stands for Voice over Internet Protocol. Using VoIP, voice information is converted into digital packets and sent over the Internet, and then converted back into analog signals before reaching the phone receiver at the other end.

How Voip works:

Voice over IP, or VoIP, means that your voice is carried over the IP network, otherwise known as the Internet. Your voice, which is an analogue signal, is converted to digital data, which is then disassembled and transmitted through the Internet only to be re-converted back to an analogue signal on the other end.

Protocols used to carry voice signals over the IP network are commonly referred to as Voice over IP or VoIP protocols.

Traditional vs Modern
In a traditional telephone phone system (POTS, Plain Old Telephone System) an analog voice signal is switched to make a single direct connection to each point.

vs

Within VoIP, the analog signal is broken in to packets that are delivered to the other end (connection) by various routes on the Internet. At the end of each connection is a system that re-assembles and puts together the original voice signal. This re-assembly is then converted to an analog signal which can be listened to via a standard telephone device.

Your voice (analogue signal) is converted through a device called a VoIP adapter.

You can make local and long distance telephone calls over the Internet using your computer, VoIP IP Phone or VoIP adapter.

Types of VoIP :

Computer to computer - FREE
Computer to phone - $$Phone to phone
Phone to phone

A Presentation of The Different VoIP Features

VoIP offers an abundant amount of interesting, useful and enhanced features, many of which come free with service packages from VoIP service providers. Which feature you want to include in your VoIP service package will depend on your communication needs.There are features that allow you to manage your calls, to access additional services, to enjoy additional handy tools and to make your VoIP experience rich and sophisticated. Some of these features can be business tools while others can be truly helpful communication tools among friends and relatives.Below is a list of the VoIP features you can have with your service provider. Each list item below links to a glossary explaining the feature.

Basic VoIP Features
Caller ID
Voicemail Fax
3-Way Calling
Call Blocking
Call Waiting
Call Forwarding
Caller ID With Name
Last Number Re-dial 411
Directory
Local Number Portability
911 Service

Who are the main users of VoIP service?
Residential home users
Small Business or Home Office

Advantages of Using VoIP

You pick up the receiver, which sends a signal to the ATA.

The phone number data is sent in the form of a request to your VoIP company's call processor. The call processor checks it to ensure that it's in a valid format.

You finish talking and hang up the receiver.

When you hang up, the circuit is closed between your phone and the ATA.

The ATA sends a signal to the soft switch connecting the call, terminating the session.

You can also sign up with a VoIP service provider which charges a monthly fee in return for unlimited calls within a certain geographic area. For example, some VoIP services in the United States allow you to call anywhere in North America at no extra charge. Overseas calls are charged at a relatively small rate.

Another advantage of VoIP is portability. You can make and receive phone calls wherever there is a broadband connection simply by signing in to your VoIP account. This makes VoIP as convenient as e-mail – if you are travelling, simply pack a headset or Internet phone and you can talk to your family or business associates for almost nothing.

When you are using a PSTN line, you are charged for the time you are connected to that carriers network. The longer you stay connected, the more that you pay. With VoIP you are using either a public or private network and thus do not have any time related call charges. In addition, VoIP can be used to connect more than two people for a call, allowing you to talk to many people at the same time.

Disadvantages of Using VoIP

First of all, VoIP is dependant on wall power. Your current phone runs on phantom power that is provided over the line from the central office. Even if your power goes out, your phone (unless it is a cordless) still works. With VoIP, no power means no phone. A stable power source must be created for VoIP.

Because VoIP uses an Internet connection, it's susceptible to all the hiccups normally associated with home broadband services. All of these factors affect call quality:
Latency
Jitter
Packet loss

Phone conversations can become distorted, garbled or lost because of transmission errors. Some kind of stability in Internet data transfer needs to be guaranteed before VoIP could truly replace traditional phones

VoIP is susceptible to worms, viruses and hacking, although this is very rare and VoIP developers are working on VoIP encryption to counter this.

With all this going for it, it's a wonder that anybody still uses regular phone services. However, there are a few disadvantages to VoIP. Continuous service during a power outage and emergency calls are two of the biggest problems.

During a blackout a regular phone is kept in service by the current supplied through the phone line. This is not possible with Internet phones, so when the power goes out, there is no VoIP phone service. One solution to this problem is to use battery backups or power generators to provide electricity.

Given the growth and increasing popularity of VoIP, it seems that all these disadvantages will be overcome in time. Now is the time that the major service providers – isp’s and telcoms – are using their formidable resources to work through the VoIP bugs. It is estimated that as soon as 2007 most of the kinks will be ironed out and VoIP should receive widespread consumer acceptance.

VoIP in short non-technical terms
it allows all users of broadband Internet access to make and receive regular phone calls via internet or to talk computer to computer across the planet - usually in local phone call quality.

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