Nortel Networks Circuit Card - Manual (Page 604)

Page 604 of 906 NT8D14 Universal Trunk card
553-3001-211 Standard 3.00 August 2005
Figure 138
Connecting RAN equipment to the NT8D14 Universal Trunk card (typical)
Typical customer-
provided external
equipment
Cross connect System
NT8D14
Universal
Trunk Card
Unit 0
Unit 1
Unit 7
NT8D37
IPE Module
MDF
0T
Slot 0
A
26
(W-BL)
Announcer
0R
1
(BL-W)
0CP
27
(W-O)
0MB
2
(O-W)
Module
I/O Panel
Connector
Part of
25-pair
cable
Part of
25-pair
cable
Parallel
trunk
connection
(Note 2)
T
Voice
signal Ref
R
Control
relay
Busy
relay
Note 1
Tel
ground
C
Com
MC
NC
B
Com
MB
ST+
Opto-
isolator
Start
553-AAA1149
STÐ
NC
48 V
Note 1: For continuous operation mode, connect the trunk unit MB line to the announcer B line
only and ground the announcer ST+ line. For pulse start or level start modes, connect the trunk
unit MB line to the announcer ST+ line only and leave the announcer B line unconnected.
Note 2: A maximum of 24 universal trunk card units can be paralleled to a single announcer
channel.
Audio
pair
Signal
pair