Nortel Networks 1000 User Manual

Page 314

314

NT5D60/80/81 CLASS Modem card (XCMC)

Table 114
Time slot mapping (cont’d.)

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

02.06

Standard

27 August 2008