Nortel Enterprise 1000 Reference Manual page 114

Page 114 of 236
Figure 41
E&M Type I signaling patterns – originating party release on a tandem connection
Note:
IMM = Immediate start
DDL = Delayed dial
WNK = Wink start
553-3023-211 Standard 1.00 June 2001
NT8D15 E&M Trunk Card
Near-end M lead
Ground
Idle
Dial CO/
FX/WATS
O/G tie
trunk disc
Far-end
Far
disc
end
disc
first
O/G tie
trunk disc
first
Outgoing calls from near-end
Near-end M lead
Ground
Idle
CO/FX/WATS
Orig
end
disc
No ans sup
CO/FX/WATS ans
Near-end may be arranged
for IMM, DDL, or WNK
Far-end seizes
Incoming calls to near-end
Battery
Near-end
seizes
Go
Stored office DN digits
outpulsed after GO signal
Universal service provided
Stop
by far-end PBX if originating
end is senderized
Far-end ans
Battery
Dial CO/FX/WATS and office DN
disc
CO/FX/WATS end disc first
Orig end
(ground start only)(ans sup)
disc first
Pseudo-answer supervision
provided approx. 150 ms
after last dial pulse
Near-end stores office DN
Ð If ground start trunk, outpulse
toward office after ground
detection
Ð If loop start trunk, outpulse
toward office 1 sec later
553-CSE6264