Uniform resource locator

URL is called as Uniform Resource Locator. It is a full 
address to locate the Internet resources such as document, 
file like movie, image and others.
 it categories into three part:
1. protocol part.
2.ip address part.
3.resource part.

Unit relational limit

URL stands for : Uniform Resource Locator.
To access information over internet using web browser URL 
is used as a address to access particular web site.

URL is the convertion of IP to human understandable form.
Users give the name of website in the browser which is 
later on converted to IP address by DNS server. And the 
request page is send to users browser.

Universal resource locator

gatways

An adapter attached to the analog phone

codec
codec standing for coder-decoder
coder convert analog to digital at sending side & digital 
to analog at recieving side.

ATA (Analog Telephone Adaptor)

gateways

voip work on packet switching.analog data convert in 
discreat packets(codec used for this) & traval over 
internet.voice travel in digital form .

voip is an protocol where u can call a telephone over an
internet

The first thing all mean the same thing. Which is using IP 
(Internet protocol) for voice services. Some voice networks 
are only packet-switched and have no access outside of 
their own VoIP network. Most VoIP networks have a Gateway 
that connects to a circuit-switched external network which 
gives them acces to external calling. One of the gateways 
responsibilites is to convert G.711 Circuit-switched media 
(typically a T1 provided by a telco company) to the 7.723 
Packet-switched media that will traverse the companies VoIP 
network. A device called a gatekeeper will then convert the 
IP address (used by H.323 protocol) to a standard telephone 
number (E.164 address) that can be used for external 
calling.  

A converged network is a network that passes both Voice and 
Data over the same set of devices. Converged networks 
generally implement QoS (Quality of service) on all actived 
network devices to ensure the VoIP has priority over 
standard data because of it's more rigid demands.

voice over internet protocol, also called voip,ip 
telephony,broadband telephony,broadband phone 7 voice over 
broad band is the routing of voice conservations over the 
internet or through any other ip-based network.voip 
services convert into a digital signal is converted to a 
regular telephone signal before it reches the destination.

VoIP (Voice over Internet Protocol) is simply the
transmission of voice traffic over IP-based networks.

The Internet Protocol (IP) was originally designed for data
networking. The success of IP in becoming a world standard
for data networking has led to its adaption to voice networking.

VOIP means voice over internet protocol. In which the voice is send through internet (or any IP network). For that the analog voice is converted into digital 
data and use appropriate CODEC (for bandwidth saving) and send through IP 
network. At the receiving end the digital data is converted back into analog 
voice.

The big advantage is VoIP may save you money depending on 
how much you are currently spending for local and long-
distance calls. What you will need to do is get the total 
cost the phone company is charging and compare it against a 
VoIP plan that interests you. With most plans, you get free 
calls within the U.S. and Canada for a low flat rate. 
International calls usually have very low rates with no 
connection fees. For both residential customers and 
businesses that make a lot of long distance and 
international calls, the savings can be several hundred 
dollars a year.

Another advantage is with the features available with VoIP. 
Features such as caller ID, call waiting, call forwarding, 
3 way conferencing and voice mail are usually included at 
no extra cost. With the phone company, these services are 
usually extra.

In addition, you can make free phone calls anywhere there 
is a high speed Internet connection available. That means 
you can be in another state or even in another country and 
make calls as if you were back at your home or business. 
You will just need to bring your phone adapter along with 
you and possibly a phone in case one is not available

The main requirement is a broadband Internet connection 
such as DSL or cable. Any other equipment such as a 
telephone adapter or microphone usually comes with the VoIP 
service provider.

Using your DialUp Internet Connection also you can use VoIP.

Sam.

generally following things are required for voip

1)Broadband connection
2)voip phone
3)nexton softswitches
4)router
5)audiocodec
6)astric server

To understand how VoIP works, you will be taken through the 
process of voice transmission from one end to the other. 
The process starts with a person talking into the 
mouthpiece on one end of a VoIP call.

This analog voice signal must first be sampled and 
digitized. Voice sampling is usually done 8,000 times per 
second (8KHz). In order to reduce bandwidth, a voice CODEC 
is used. A voice CODEC is a compression/decompression 
algorithm that is optimized for the voice frequency range. 
The bit stream uncompressed is 64Kbps. By using an 
available CODEC, the bit stream can be reduced to 8Kbps or 
less.

In order for the compressed voice data to be sent over the 
Internet, it must go through a process called 
packetization. This is a packet consisting of a small 
sample of the voice data (usually 10-30 milliseconds).

While being routed through the Internet, these packets can 
get delayed or even lost. This can cause degradation in 
voice quality. Simply put, there are various mechanisms in 
place to compensate for these problems and help smooth out 
the audio.

Once all the packets arrive on the listening end of the 
call, they must be reassembled to their original state. The 
packets are decompressed and converted from a digital to 
analog voice signal.

I thought CODEC is coder/decoder!

VoIP stands for Voice over Internet Protocol. It means the 
transmission of voice and call control data over the 
Internet. In other words, this technology allows you to 
make phone calls over the Internet.

VOIP stands for Voice Over Internet protocol. It is 
packetised digitised communicationation of multimedia files 
over internet protocol.