Nortel Networks Circuit Card 311 User Manual

Page 320

320

NT5D60/80/81 CLASS Modem card (XCMC)

XCMC mapping of TNs

TNs

DS30X

timeslot

Modem units on the CLASS

Modem card

12
13
14
15

04
05
06
07

16
17
18
19

module 2,

00
01
02
03

20
21
22
23

04
05
06
07

24
25
26
27

module 3,

00
01
02
03

28
29
30
31

04
05
06
07

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.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

01.04

Standard

Release 5.0

23 May 2008