Nortel Networks 553-3001-211 manual Card LAN link

Page 34 of 894 Overview

Figure 3

DS-30X loop data format

DS-30X loop

29

30

31

0

1

2

3

4

data words

Frame

sync

5.12 MHz

2.56 MHz

Frame sync

DS-30X loop

W31DV

W0B7

W0B6

W0B5

W0B4

W0B3

W0B2

W0B1

W0B0

W0SB

W0DV

W1B7

data bits

SB = SIGNALING BIT

DV = DATA VALID

553-6151

DS-30Y network loops extend between controller cards and superloop network cards in the Common Equipment (CE). They function in a manner similar to DS-30X loops. See Figure 5 on page 39.

ADS-30Y loop carries the PCM timeslot traffic of a DS-30X loop. Four DS-30Y network loops form a superloop with a capacity of 128 channels (120 usable timeslots). See Communication Server 1000M and Meridian 1: Large System Planning and Engineering (553-3021-120) for more information on superloops.

Card LAN link

Maintenance communication is the exchange of control and status data between IPE line or trunk cards and the Call Server by way of the NT8D01 Controller card. Maintenance data is transported through the card LAN link. This link is composed of two asynchronous serial buses (called the Async card LAN link in Figure 2 on page 32). The output bus is used by the system controller for output of control data to the line card. The input bus is used by the system controller for input of line card status data.

553-3001-211 Standard 2.00 September 2004