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.