Nortel Networks 553-3001-211 manual 636 of 894 NT8D15 E&M Trunk card

Page 636 of 894 NT8D15 E&M Trunk card

Figure 149

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

leads	Open
Near end EA/EB	Closed

Near end M/SB leads

Open		Closed
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

Outgoing calls from system (near end)

		Near end M/SB leads
		Open	Closed
		Idle
leads	Open	Orig	CO/FX/WATS
		disc	disc
EA/EB		end
			Orig end
			disc first
Near end	Closed		COS-no ans sup

CO/FX/WATS ans

Local end may be arranged for IMM, DDL, or WNK Far end seizes

Incoming calls to system (near end)

Note: IMM = Immediate start

DDL = Delayed dial

WNK = Wink start

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

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-AAA1154

553-3001-211 Standard 2.00 September 2004