Nortel Networks Circuit Card - Manual (Page 648)

Page 648 of 906 NT8D15 E&M Trunk card
553-3001-211 Standard 3.00 August 2005
Figure 152
E&M Type II signaling patterns – originating party release on a tandem connection
Near end M/SB leads
Near end EA/EB leads
Near end stores office DN
Dial CO/FX/WATS and office DN
CO/FX/WATS end disc first
(ground start only)(COS-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-AAA1154
Open
Closed
Open
Closed
Near end M/SB leads
Outgoing calls from system (near end)
Incoming calls to system (near end)
Near end EA/EB leads
Local end may be arranged
for IMM, DDL, or WNK
Far end seizes
Open
Closed
Open
Closed
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
COS-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
Note: IMM = Immediate start
DDL = Delayed dial
WNK = Wink start