Nortel Networks NN43001-314 - Manual (Page 414)

414 List of terms
routing
The process of selecting the correct path for packets transmitted between IP
networks by using software-based algorithms. Each packet is processed by
the algorithm to determine its destination.
SIP
Short for Session Initiation Protocol. SIP is a protocol standard used
for establishing, modifying, and terminating conference and telephony
sessions in IP networks. A session can be a simple two-way telephone call
or it can be a collaborative multi-media conference session. SIP initiates
real-time, multimedia sessions which can integrate voice, data, and video.
The protocol’s text-based architecture speeds access to new services with
greater flexibility and more scalability.
TDM
Short for Time Division Multiplexing, a type of multiplexing that combines
data streams by assigning each stream a different time slot in a set.
TDM repeatedly transmits a fixed sequence of time slots over a single
transmission channel.
Within T-Carrier systems, such as T-1 and T-3, TDM combines Pulse Code
Modulated (PCM) streams created for each conversation or data stream.
TLAN subnet
Telephony Local Area Network subnet. This subnet is separated from the
rest of the network and connects the Voice Gateway Media Cards, the
Signaling Server, and the IP Phones for telephony communication purposes.
TPS
IP Phone Terminal Proxy Server. This server controls the connection of
IP Phones. It resides on the Signaling Server with an emergency backup
on the Voice Gateway Media Card.
UDP
Uniform Dialing Plan. Each location within the network is assigned a
Location Code, and each telephone has a Directory Number that is unique
within the network. Under the Uniform Dialing Plan (UDP), the Branch User
ID is the user’s main office Directory Number (DN) with the Access Code
(for example, 6 343-5555). For details of other Numbering Plan options, see
Communication Server 1000E Planning and Engineering (NN43041-220).
Voice gateway
The voice gateway application is used any time an IP and TDM device are
connected together. The cards are equipped with DSPs to perform media
transcoding between IP voice packets and TDM-based devices. The Media
Cards also provide echo cancellation and compression and decompression
Nortel Communication Server 1000
Branch Office Installation and Commissioning
NN43001-314 01.02 Standard
Release 5.0 20 June 2007
Copyright © 2007, Nortel Networks
.