Nortel Networks Circuit Card 311 - Manual (Page 771)

Operation 771
Condition
Current in
signaling lead State of trunk
detector
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 284
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
(CS 1000 can be arranged for IS, DD, or WS) Current flow Low
Near-end ready for digits
Dial CO/FX/WATS and office DN Current flow interrupted
for each pulse Low-high-low for each
pulse
If a ground start*, the stored digits are sent out
on CO/FX/WATS trunk after ground detection. If
a loop start, the stored digits are outpulsed on
CO/FX/WATS trunk after 3 seconds.
If answer supervision is enabled, pseudo-answer
supervision is sent approximately 13 seconds
after last dial pulse is received No current flow Low
If no-answer supervision is enabled, CO end
disconnects Current flow Low
Originating end disconnects – network torn down
and trunk idled No current flow High
Note: * – CO ground start: the trunk is idled and the network taken
down, but the incoming tie trunk is controlled by the originating end.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.