AT&T Release 2.0 Telephone User Manual


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Installing the Control Unit
Switches
1 through 5
control
Port 4
(E&M
unprotected)
Switches
6 through 10
control
Port 3
(E&M
protected)
Switches
1 through 5
control
Port 2
(E&M
simplex)
Switches
6 through 10
control
Port 1
(E&M
protected)
Figure 2-16. Setting the 400EM Module DIP Switches for E&M Signaling
Types 1C and 5
2-54
Installing the Modules
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