AT&T 3.0 manual Signaling Formats for the 400EM Tie Trunk Module, Merlin

Installing the Modules

NOTE:

DIP switches 1, 2, 6 and 7 determine whether the tie trunks are protected or unprotected. DIP switches 3, 4, 5, 8, 9, and 10 determine the mode. Simplex mode is always protected. Therefore the Protected/Unprotected settings for DIP switches 1, 2, 6 and 7 have no effect.

The successful implementation of a tie trunk format is dependent upon matching the characteristics of both the PBX systems it connects. The preferred signaling formats for a tie trunk originating in the system are shown in Table 2–5 below.

Table 2-5. Signaling Formats for the 400EM (Tie Trunk) Module

		Installation	Situation		Preferred Signaling Format
		From System		System		Distant Location
			Distant	Signaling	Protected or	Signaling	Protected or
To			Location	Mode/Type	Unprotected	Mode/Type	Unprotected
MERLIN II			Same site	Type 5 Simplex	N/A	Type 5 Simplex	N/A
			co-located
System			Same site	Type 5 Simplex	N/A	Type 5 Simplex	N/A
25/75/85			co-located
or DEFINITY
System			Inter-office	Type 5 Simplex	N/A	Type 5 Simplex	N/A
25/75/85
or DEFINITY
	Dimension PBX		Same site	E&M Type 1 C	Unprotected	E&M Type 1 S	Unprotected
			co-located	(Compatible)		(Standard)
	Dimension PBX		Inter-office	E&M Type 1C	Protected	E&M Type 1 S	Protected
				(Compatible)		(Standard)
Other Systems			Same site	E&M Type 1 C	Unprotected	E&M Type 1S	Unprotected
			co-located	(Compatible)		(Standard)
Other Systems			Inter-office	E&M Type 1 C	Unprotected	E&M Type 1 S	Requires a
				(Compatible)		(Standard)	protection unit
	MERLIN		Same site	Type 5 Simplex	N/A	Type 5 Simplex	N/A
	LEGEND		co-located
			or inter-office

2-36Installing the Control Unit