Specifications

ELMo 120 Multiplexer installation and testin
g
2-9
Revision 2.01 ELMo 120 Multiplexer Installation and Maintenance Guide 08-01023-01
Connecting power to the ELMo 120 Multiplexer modem shelf (continued)
Step Action
6
Turn ON the -48 V dc power supply.
7
Usin
g
an appropriate volt-ohm meter, test the power feed at the shelf
backplane connection. Verify that the red power feed at the shelf is the -48 V
dc supply. The meter should read between -46 and -56 V dc.
8
Check and ensure that the to
gg
le switch on the Power card is in the OFF
position.
9
Re-seat the cards into their shelf backplane connectors.
10
Secure the power harness cable in accordance with local office procedures.
STOP
You have completed this task.