Nortel Networks 1000 - Manual (Page 682)

682 NT8D15 E and M Trunk card
Table 251
DX signaling - outgoing calls with originating party release
Condition
Current in
signaling lead State of trunk
detector
Idle No current flow High
Seizure
(dial tone from far-end: far-end ready for digits) Current flow High
Digits Current flow
interrupted for each
pulse High
Far-end answers No current flow Low
Far-end on hook first Current flow High
Network taken down and trunk idled when
near-end goes on hook 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 252
DX signaling - incoming calls with originating party release
Condition
Current in
signaling lead State of trunk
detector
Idle No current flow High
Seizure
(dial tone to far-end: near-end ready for digits) Current flow Low
Digits Current flow
interrupted for each
pulse Low-high-low for each
pulse
Near-end answers No current flow Low
Far-end on hook first Current flow High
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 253
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
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
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