Nortel ISDN Signaling Link, Описание, установка и эксплуатация

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Page 20 of 378 Description
553-3001-202 Standard 1.00 April 2000
Non-compressing G.711 codecs require 100BaseT Ethernet network
connectivity. A 10/100BaseT autosensing Ethernet interface routes the VoIP
traffic from the ITG ISL Trunk cards. Signaling between cards and
communication with the Meridian Administration Tools (MAT) PC is over a
10BaseT Ethernet connection. The MAT application manages the ITG ISL
Trunk.
Figure 1 shows an ITG ISL Trunk configuration example.
Figure 1
ITG ISL Trunk connectivity
Note: In this document, T-LAN refers to the Telephony LAN that
transmits the ITG voice and fax traffic. E-LAN (embedded LAN) refers
to the management and signaling LAN for the Meridian 1 site.
ITG ISL Trunk depends on the managed IP network, not the Internet, because
the managed IP network can provide adequate latency, jitter, and packet loss
performance to support VoIP with an acceptable voice quality.
IP Network
DCH H.323
ITG ISDN IP Trunk tandems
DCHIP + Followers
Meridian 1 to IP network, providing
point to multi-point connection
northern
telecom
Meridian 1
Meridian 1
northern
telecom
Meridian 1
Meridian 1
northern
telecom
Meridian 1
Meridian 1
northern
telecom
DSP
Meridian 1
t
2
I
T
G
2
I
T
G
2
I
T
G
553-9340