Computer Hardware Installation Guide

Operation 761
Condition
Current in
signaling lead
State of trunk
detector
Network taken down and trunk idled No current flow High
Near-end on hook first, network taken down Current flow Low
Far-end on hook, trunk idled No current flow High
Table 275
DX signaling - outgoing calls with originating party release on tandem connections
Condition
Current in
signaling lead
State of trunk
detector
Idle No current flow High
Seizure (far-end ready for digits) Current flow High
Dial CO/FX/WATS Current flow interrupted
for each pulse
High
Stop sender No current flow Low
Go sender (universal service provided by far-end
PBX if originating end is senderized)
Current flow High
CO/FX/WATS offices ready for digits
Stored Office DN digits Current flow interrupted
for each pulse
High
Outpulsed No current flow Low
Far end answers No current flow Low
Far end on hook first Current flow High
Near end on hook, network taken down, trunk
idled
No current flow High
Near end on hook first, network taken down Current flow Low
Far end on hook, trunk idled No current flow High
Table 276
DX signaling - incoming calls with originating party release on tandem connections
Condition
Current in
signaling lead
State of trunk
detector
Idle No current flow High
Seizure
(Can be arranged for IS, DD, or WS) (near-end
ready for digits)
Current flow Low
Dial CO/FX/WATS and office DN Current flow interrupted
for each pulse
Low-high-low for each
pulse
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.