Nortel Networks 1000 User Manual
Page 50
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
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Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
02.06
Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
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