119
Installing an Avaya SCC1 Media Gateway Stack
October 2002
Set the Ringer Frequency
!
CAUTION:
When adding or replacing any hardware, be sure to ground yourself against electrostatic
discharge (ESD) by wearing a grounded wrist strap.
The default ringer frequency setting on the 1217A power supply for North America is 20 Hz
and the international setting can be either 20 Hz or 25 Hz. To set the ringer frequency on the
1217A power supply:
1 Power down AUDIX and any other circuit pack that might be running an application.
2 Power down the media gateway.
3 Release both latches on the power supply and slide the unit out of the media gateway.
4 Observe the ring frequency switch label on the side of the power supply and locate the
switch on the bottom.
5 Set the ring frequency select switch to the appropriate frequency setting.
6 Slide the power supply back into the slot and ensure that both latches snap closed.
Connect the Power Cord into the Power
Receptacle
1
Provide one receptacle per media gateway.
2 Verify that the circuit breakers are OFF.
3 Plug the media gateway AC power cord into the AC power receptacle on the rear of each
media gateway.
4 Plug the opposite end of each AC power cord into the appropriate AC power receptacle
in the equipment room.
NOTE:
Loop the excess cord and tie wrap it to the back cover to prevent accidental unplugging.
Connect Time Division Multiplexing Bus Cables
1 Locate the white fabric-covered Time Division Multiplexing (TDM) bus cable on the
rear of the media gateways.
2 Remove the TDM Bus Terminator from Slot 18 of the expansion control media gateway
A (J58890N) and move it to Slot 17 on port media gateway B (J58890H). See
‘‘Connections for Media Gateway Stacks’’ on page 120
.
3 Connect the supplied TDM Bus Cables (WP-91716 L3) as shown.
4 Repeat for each port media gateway in the stack.
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