Nortel Networks Circuit Card - Manual (Page 644)

Page 644 of 906 NT8D15 E&M Trunk card
553-3001-211 Standard 3.00 August 2005
Figure 150
E&M Type I signaling patterns – originating party release on a tandem connection
Near end M lead
Near end E lead
Near end stores office DN
Dial CO/FX/WATS and office D
CO/FX/WATS end disc first
(ground start only)(ans sup)
Pseudo-answer supervision
provided approx. 150 ms
after last dial pulse
Universal service provided
by far end PBX if originating
end is senderized
Stored office DN digits
outpulsed after GO signal
553-6264
Ground
Ground Open
Battery
Near end M lead
Outgoing calls from near end
Incoming calls to near end
Near end E lead
Near end may be arranged
for IMM, DDL, or WNK
Far end seizes
Note: IMM = Immediate start
Ground
Ground Open
Battery
Go
Idle
Idle
O/G tie
trunk disc
Dial CO/
FX/WATS
CO/FX/WATS
disc
O/G tie
trunk disc
first
Near end
seizes
Far end ans
Far
end
disc
first
Far end
disc
Stop
Orig end
disc first
Orig
end
disc
No ans sup
CO/FX/WATS ans
Ð If ground start trunk, outpulse
toward office after ground
detection
Ð If loop start trunk, outpulse
toward office 1 sec later
DDL = Delayed dial
WNK = Wink start