Assembly Description; Itg Line 2.1 Card Functional Description; Itgl Gateway Functional Description - Nortel Enterprise 1000 Reference Manual

Assembly description

ITG Line 2.1 card functional description

ITGL Gateway functional description

Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
DS-30X voice/signaling
DS-30X carries Pulse Code Modulation (PCM) voice and proprietary
signaling on the IPE backplane between the ITGL 2.1 card and the Succession
System Controller (SSC).
Card LAN
Card LAN carries card polling and initialization messages on the IPE
backplane between the ITGL 2.1 card and the SSC.
The ITGL 2.1 card assembly consists of a two-slot motherboard/
daughterboard combination. A PCI interconnect board connects the ITG
motherboard and the DSP daughterboard.
The ITGL 2.1 card performs two separate functions:
• a gateway between the Time Division Multiplexing (TDM) voice
switching network and the IP network.
• a Terminal Proxy Server (TPS) or "virtual line card" for the i2000 series
Internet Telephone.
The TPS portion of the card connects through the ELAN port to the
Succession CSE 1000 system controller through the 10BaseT port. The ITGL
Gateway portion of the card connects to the Succession CSE 1000 SSC
through the DS-30X backplane. The ITGL Gateway portion also receives call
speech path setup and CODEC selection commands through the ELAN port.
The i2000 series Internet Telephone accesses both the Gateway and TPS
functions through the TLAN port.
The ITGL Gateway:
• registers with the Succession CSE 1000 Call Server using the TN
Registration messages
• accepts commands from the Succession CSE 1000 Call Server to
connect/disconnect audio channel
ITG Line 2.1 NTVQ55AA card Page 39 of 236