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Issue 6
5 - 118
6.6.5
Connectors
The VRS(4)-U( ) ETU has one connector:
CN1
6.6.6
Pins
Two pins, SP1 and SP2, are located on the top right of the
VRS ETU. These short pins are for maintenance. Do not
change the factory default settings on these pins. Pins 2
and 3 are short-circuited.
Connects to the backboard
Installing Electronic Telephone Units
Electra Elite
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