166
Installing and Wiring Telephones
October 2002
5 Make cross-connections for each emergency trunk/emergency station pair.
The 808A is connected to the Main Distribution Frame (MDF) by means of a B25A
cable. ‘‘Connections for Telephone Used for Emergency Transfer’’ on page 169
shows
the connections at the trunk/auxiliary field for a telephone used only for emergency
transfer.
‘‘Connections for Telephone Used for Emergency Transfer and as Normal Extension’’ on
page 170 shows the connections at the trunk/auxiliary field for a telephone used for
emergency transfer as well as a normal extension.
6 On the trunk identification label at the bottom of the panel, record the trunk line,
extension, and location for each circuit.
7 To each telephone designated as an emergency terminal, attach a label identifying it as
such. The labels are provided with the unit.
8 Check for normal operation as follows:
• Place the test switch (switch 12) in NORMAL OPERATION.
• Ensure the power supply is providing -48 VDC at 80 mA maximum. The power
LED should be ON.
• Check wiring connections.
• Verify there is dial tone on all emergency transfer sets.
If all of the above conditions are not met, remove the panel from service and replace it
with a new panel.
9 Check for transfer operation as follows:
• Place the test switch (switch 12) in the ACTIVATED position.
• The power LED should be OFF.
• Verify there is dial tone on all emergency transfer sets.
If all of the above conditions are not met, remove the panel from service and replace it
with a new panel.
.
Trunk/Test Switches
Switch Number Circuit Number
11
2 1
32
4 2
53
6 3
74
8 4
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