Nortel Circuit Card 311 Reference page 320

320 NT5D60/80/81 CLASS Modem card (XCMC)
The CLASS Modem card is designed to plug into any one of the peripheral
card slots of the IPE module. The CLASS modem card supports up to
32 transmit-only modem resources, using a DS30X interface. Up to 255
modems can be configured per system.
The CND transmission process begins with the system software sending an
initiating message to the CLASS Modem card indicating the length of the
CND information and the type of the CND information flow to be transmitted.
In response, the CLASS Modem card assigns a message buffer to capture
the CND information from the system software.
System software then sends the CND information to the CLASS Modem
card, one byte at a time, where it is stored in the message buffer. If the
CLASS Modem card receives more bytes than were specified in the
initiating message, then the additional bytes are discarded and not included
in the CND memory buffer.
Copyright © 2003-2008, Nortel Networks
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XCMC mapping of TNs
DS30X
TNs timeslot
12 12
13 13
14 14
15 15
16 16
17 17
18 18
19 19
20 20
21 21
22 22
23 23
24 24
25 25
26 26
27 27
28 28
29 29
30 30
31 31
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Modem units on the CLASS
Modem card
04
05
06
07
module 2,
00
01
02
03
04
05
06
07
module 3,
00
01
02
03
04
05
06
07