Page 638 of 894 NT8D15 E&M Trunk card
553-3001-211 Standard 2.00 September 2004
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 195
DX signaling – outgoing 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 (far-end ready for digits) Current flow High
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
Table 194
DX signaling – incoming calls with originating party release (Part 2 of 2)
Condition
Current in
signaling lead
State of trunk
detector