AT&T 518-600-016 manual Setting tie line module DIP switches

			Switches
			1 through 5
S2(controls			control Port 4
			(E&M
Ports 3 and 4)			unprotected)
Port	4		Switches
			6 through I o
P o r t	3		control Port 3
			(E&M
			protected)
			Switches
			1 through 5
Port		2	control Port 2
			(simplex)
P o r t		1
S1 (controls			Switches
			6 through 10
Ports 1 and 2)			control Port 1
			(E&M

FIGURE 3-5 Setting tie line module DIP switches.

Table 3-2shows the switch settings you should use to set the signaling mode of each port to E&M protected, E&M unprotected, or Simplex.

WARNING: The protected mode must be used whenever the E&M leads extend out-of-building and are not connected to the network interface. See pages 1-47and 1-48

Administering a New System 3-51