Nortel Networks Circuit Card - Manual (Page 651)

NT8D15 E&M Trunk card Page 651 of 906
Circuit Card Description and Installation
Near end on hook first, network taken down Current flow Low
Far end on hook, trunk idled No current flow High
Table 201
DX signaling – incoming calls with originating party release on tandem connections
(Part 1 of 2)
Condition
Current in
signaling lead State of trunk
detector
Idle No current flow High
Seizure
(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
Stored digits outpulsed on CO/FX/WATS trunk
after ground detection if a ground start, but after 3
seconds if a loop start
If answer supervision: pseudo-answer supervision
is sent approximately 13 seconds after last dial
pulse received No current flow Low
Table 200
DX signaling – outgoing calls with originating party release on tandem connections
(Part 2 of 2)
Condition
Current in
signaling lead State of trunk
detector