Nortel Networks NN43001-563 ITG-Pentium 24-port trunk card (NT0961AA)

46 System description

When a DCHIP trunk card failure occurs, the associated trunks’ states

appear busy to the Meridian 1/CS 1000M, so the trunks will not be used for

calls. This blocks the normal software action of reverting to analog signaling

when an ISL DCH fails. If either end’s DCHIP or DCH connection fails, ISDN

protocol features across the IP network do not function. When a DCHIP

card fails, its associated Followersare also removed from ser vice.

In the case of a DCH failure, established calls are maintained; however,no

new calls can be made. Calls in a transient state are dropped.

ITG-Pentium 24-port trunk card (NT0961AA)

The ITG-Pentium 24-port trunk card was introduced as part of ITG Trunk

2.0. During the installation of the IP Trunk 3.01 loadware, the application

on the ITG-P 24-port card(s) (ITG-P) must be upgraded. It is essential to

ensure the latest software is loaded on the ITG-P card(s).

Description

The NT0961AA ITG-Pentium 24-port trunk card plugs into an Intelligent

Peripheral Equipment (IPE) shelf. Each ITG-Pentium 24-port trunk card

occupies two slots. ITG-Pentium 24-port trunk cards have a ELAN network

interface (10BaseT) and a TLAN network interface (10/100BaseT) on

the I/O panel. The ITG-Pentium 24-port trunk card has a DIN-8 serial

maintenance port connection on the faceplate and an alternative connection

to the same serial port on the I/O backplane.

Do not connect two maintenance terminals to both the faceplate and I/O

panel serial maintenance port connections at the same time.

The NT0961AA ITG-Pentium24-por t trunk card supports 24 ports per card.

The core ITG processor is an Intel Pentium II (266 Mhz).

The ITG-Pentium 24-port trunk card is responsible for converting the 64

kbit/s Pulse Code Modulation (PCM) speech from the DS-30X backplane

interface into packetizedspeech for transmission over the IP network. On

the daughterboard, the DSPs compress speech and feed the resulting

packets to the IP network.

Figure 7 "ITG-Pentium 24-port trunk card system connectivity and

messaging" (page 47) shows ITG-Pentium 24-port trunk card system

connectivity.TheITG card provides sufﬁcient ﬂexibility to emulate any

DS-30X signaling protocol. To support IP terminals, an ITG card emulates

the XDLC with attached Aries sets. Signaling on all DS-30 channels is

supported, allowing the ITG card to support up to 32 ports on a single card.

Nortel Communication Server 1000

IP TrunkFundamentals

NN43001-563 02.01 Standard

Release 5.5 21 December 2007