Nortel Networks 553-3001-211 manual 632 of 894 NT8D15 E&M Trunk card

Page 632 of 894 NT8D15 E&M Trunk card

Figure 147

E&M Type I signaling patterns – originating party release on a tandem connection

lead	Open
Near end E	Ground

Near end M lead

Ground		Battery
Idle		Near end
Dial CO/		seizes
FX/WATS		Go
O/G tie
trunk disc
Far end	Far
disc		Stop
	end
	disc
	first
O/G tie
trunk disc
first		Far end ans

Stored office DN digits outpulsed after GO signal

Universal service provided by far end PBX if originating end is senderized

Near end E lead

Note:

Outgoing calls from near end

	Near end M lead
	Ground	Battery
	Idle
Open	Orig	CO/FX/WATS
	disc	disc
	end
		Orig end
		disc first
Ground		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

IMM = Immediate start

DDL = Delayed dial

WNK = Wink start

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

ÐIf ground start trunk, outpulse toward office after ground detection

ÐIf loop start trunk, outpulse toward office 1 sec later

553-6264

553-3001-211 Standard 2.00 September 2004