89
Installing an Avaya MCC1 Media Gateway
October 2002
5 Connect the -48 volt DC wire to the -48VDC terminal on the J58890CF Power
Distribution Unit.
6 Connect the -48 volt RTN wire to the -48RTN terminal on the J58890CF Power
Distribution Unit terminal block.
7 Repeat Steps 2 through 6 for each cabinet and auxiliary cabinet in the system.
Connect DC Battery Cabinet to DC Power Cabinet
NOTE:
The wire in the next step must be sized for a maximum voltage drop of 0.5 VDC in each
leg of the DC distribution. In this example 1 AWG is used.
1 Turn off the main circuit breaker on the DC battery cabinet.
2 Turn off the main circuit breaker on the DC power cabinet.
3 Measure and cut a 6 AWG (#40) (16 mm
2
) wire long enough to reach from the DC
battery cabinet’s -48 Volt DC terminal to a DC OUTPUT distribution bus on the DC
power cabinet.
4 At the DC battery cabinet, connect the -48 volt DC wire to the -48 VDC connector.
5 Route the wire out of the cabinet through the hole in the lower rear cover and to the DC
power cabinet.
6 At the DC power cabinet, terminate the -48 volt DC wire on a DC OUTPUT distribution
bus.
Connect Mixed AC/DC Power and Ground
‘‘Typical Power and Ground for a Mixed AC/DC-Powered Media Gateway’’ on page 90
shows
a power and ground layout for a mixed AC/DC power cabinet configuration in the same
equipment room with the first media gateway being DC powered and the next media gateway
being AC powered. If a third media gateway is part of the S8700 Multi-Connect configuration,
use the same basic connections.
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