| Wireless FAQ | |
| Latest News | |
Forum
 |
|
| Group | |
| Blog | |
| Site Map | |
| Guest Book | |
| submit your article | |
|
|
|
|
VOIP -> What is VOIP? |
|
| VoIP (voice
over IP - that is, voice delivered using the Internet Protocol) is a
term used in IP telephony for a set of facilities for managing the
delivery of voice information using the Internet Protocol (IP). In
general, this means sending voice information in digital form in
discrete VoIP, now used somewhat generally, derives from the VoIP Forum, an effort by major equipment providers, including Cisco, VocalTec, 3Com, and Netspeak to promote the use of ITU-T H.323, the standard for sending voice (audio) and video using IP |
|
| on the public
Internet and within an intranet. The Forum also promotes the user of
directory service standards so that users can locate other users and the
use of touch-tone signals for automatic call distribution and voice
mail.
In addition to IP, VoIP uses the real-time protocol (RTP) to help ensure that packets get delivered in a timely way. Using public networks, it is currently difficult to guarantee Quality of Service (QoS). Better service is possible with private networks managed by an enterprise or by an Internet telephony service provider (ITSP). A technique used by at least one equipment manufacturer, Adir Technologies (formerly Netspeak), to help ensure faster packet delivery is to use ping to contact all possible network gateway computers that have access to the public network and choose the fastest path before establishing a Transmission Control Protocol (TCP) sockets connection with the other end. Using VoIP, an enterprise positions a "VoIP device" at a
gateway. The gateway receives packetized voice transmissions from users
within the company and then routes them to other parts of its intranet
(local area or wide area network) or, using a T-carrier system or |
|
| <<< VOIP Home >>> | |