Nortel Circuit Card 311 Reference page 771

Condition
Stop sender
Go sender (universal service provided by far-end
PBX if originating end is senderized)
CO/FX/WATS offices ready for digits
Stored Office DN digits
Outpulsed
Far-end answers
Far-end on hook first
Near-end on hook, network taken down, trunk
idled
Near-end on hook first, network taken down
Far-end on hook, trunk idled
Table 284
DX signaling - incoming calls with originating party release on tandem connections
Condition
Idle
Seizure
(CS 1000 can be arranged for IS, DD, or WS)
Near-end ready for digits
Dial CO/FX/WATS and office DN
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
If no-answer supervision is enabled, CO end
disconnects
Originating end disconnects – network torn down
and trunk idled
Copyright © 2003-2008, Nortel Networks
.
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
Current in
signaling lead
No current flow
Current flow
Current flow interrupted
for each pulse
No current flow
No current flow
Current flow
No current flow
Current flow
No current flow
Current in
signaling lead
No current flow
Current flow
Current flow interrupted
for each pulse
No current flow
Current flow
No current flow
Operation 771
State of trunk
detector
Low
High
High
Low
Low
High
High
Low
High
State of trunk
detector
High
Low
Low-high-low for each
pulse
Low
Low
High