Nortel Networks Circuit Card - Manual (Page 36)

Page 36 of 906 Overview
553-3001-211 Standard 3.00 August 2005
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 41 .
A DS-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 34 ). 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.
Figure 3
DS-30X loop data format
29
W0B7 W31DV
DS-30X loop
data words
Frame
sync
Frame sync
DS-30X loop
data bits
5.12 MHz
2.56 MHz
SB = SIGNALING BIT DV = DATA VALID
30 31 0 1 2 3 4
W0B6 W0B5 W0B4 W0B3 W0B2 W0B1 W0B0 W0SB W0DV W1B7
553-6151