Nortel Circuit Card Installation Manual page 650

Page 650 of 906
Table 199
DX signaling – incoming calls with originating party release (Part 2 of 2)
Condition
Far-end on hook first
Network taken down and trunk idled
Near-end on hook first, network taken down
Far-end on hook, trunk idled
Table 200
DX signaling – outgoing calls with originating party release on tandem connections
(Part 1 of 2)
Condition
Idle
Seizure (far-end ready for digits)
Dial CO/FX/WATS
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
553-3001-211 Standard 3.00
NT8D15 E&M Trunk card
August 2005
Current in
signaling lead
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
Current flow interrupted
for each pulse
No current flow
No current flow
Current flow
No current flow
State of trunk
detector
High
High
Low
High
State of trunk
detector
High
High
High
Low
High
High
Low
Low
High
High