Owner's manual

690 NT8D15 E and M Trunk card
Table 257
DX signaling - outgoing calls with originating party release on tandem connections (cont’d.)
Condition
Current in
signaling lead
State of trunk
detector
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 258
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-answe
r supervision is sent approximately 13 seconds
after last dial pulse is received
No current flow Low
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.