Nortel Circuit Card Installation Manual page 644

Page 644 of 906
Figure 150
E&M Type I signaling patterns – originating party release on a tandem connection
Note:
553-3001-211 Standard 3.00
NT8D15 E&M Trunk card
Near end M lead
Ground
Idle
Dial CO/
FX/WATS
O/G tie
trunk disc
Far end
disc
O/G tie
trunk disc
first
Outgoing calls from near end
Near end M lead
Ground
Idle
Orig
end
disc
Near end may be arranged
for IMM, DDL, or WNK
Far end seizes
Incoming calls to near end
IMM = Immediate start
DDL = Delayed dial
WNK = Wink start
August 2005
Battery
Near end
seizes
Go
Far
Stop
end
disc
first
Far end ans
Battery
CO/FX/WATS
disc
Orig end
disc first
No ans sup
CO/FX/WATS ans
Stored office DN digits
outpulsed after GO signal
Universal service provided
by far end PBX if originating
end is senderized
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
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
553-6264