AT&T 3.0 manual 400EM Tie Trunk Module DIP Switches, Simplex Mode

Installing the Modules

E&M Mode

—Type 1 Standard (default factory setting). This setting is used to connect two systems through telephone company facilities.

—Type 1 Compatible. This setting connects two systems directly (without using telephone company facilities).

Simplex Mode

—Type 5. This setting is used on 4-wire (2-pair) circuits.

400EM (Tie Trunk) Module DIP Switches

During installation of 400EM (Tie Trunk) modules, refer to Table 2-4 and Table 2-5,and to Figure 2-11for the correct DIP switch settings for varying signaling protocols.

Table 2-4. Setting the 400EM (Tie Trunk) Module DIP Switches

		Ports		D I P	Signaling Type
	(as numbered in
				Switch	1S (Default)
	Figure 2-11)			Position	and 1C	1C and 1S	5
					Unprotected	Protected	Simplex
					E&M Mode	E&M Mode	Mode
				1	ON	OFF	OFF or ON
2			4	2	ON	OFF	OFF or ON
				3	OFF	OFF	ON
				4	OFF	OFF	ON
				5	OFF	OFF	ON
				6	ON	OFF	OFF or ON
1			3	7	ON	OFF	OFF or ON
				8	OFF	OFF	ON
				9	OFF	OFF	ON
				10	OFF	OFF	ON

Installing the Control Unit 2-35