Owner's manual

50 Overview

Maintenance data is data relating to the configuration and operation of

the IPE card, and is carried on the card LAN link. Some examples of

maintenance data are as follows:

• polling

• reporting of self-test status

• CPU initiated card reset

•

reporting of card ID (card type and hardware vintage)

• reporting of firmware version

• downloading trunk interface unit configuration

• reporting of trunk interface unit configuration

•

enabling/disabling of the DS-30X network loop bus

• reporting of card status

DS-30X loops The interfaces provided by the line and trunk cards

connect to conventional 2-wire (tip and ring) line facilities. IPE analog

line and trunk cards convert the incoming analog voice and signaling

information to digital form, and route it to the Common Equipment (CE)

CPU over DS-30X network loops. Conversely, digital voice and signaling

information from the CPU is sent over DS-30X network loops to the analog

line and trunk cards where it is converted to analog form and applied to the

line or trunk facility.

IPE digital line cards receive the data from the digital phone terminal as

512 kHz Time Compressed Multiplexed (TCM) data. The digital line card

converts that data to a format compatible with the DS-30X loop, and

transmits it in the next available timeslot. When a word is received from

the DS-30X loop, the digital line card converts it to the TCM format and

transmits it to the digital phone terminal over the digital line facility.

A separate dedicated DS-30X network loop is extended between each

IPE line/trunk card and the controller cards within an IPE module (or the

controller circuits on a network/DTR card in a CE module). A DS-30X

network loop is composed of two synchronous serial data buses. One bus

transports in the transmit (Tx) direction toward the line facility and the other

in the receive (Rx) direction toward the common equipment.

Each bus has 32 channels for pulse code modulated (PCM) voice data.

Each channel consists of a 10-bit word. See Figure 12 "DS-30X loop data

format" (page 51).

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008