Power Supply Fuse; Mounting Two To Five G650 Media Gateways - Avaya G650 Installing

10. If you are installing one G650 Media Gateway, replace the fan assembly and tighten the 7
screws (all knurled screws must be tightened securely so that they cannot be loosened
without the use of a tool) and proceed to
11. If you are installing multiple G650 Media Gateways, proceed to
Media Gateways

Power supply fuse

The fuse protects the DC input from reverse voltage on the -48 VDC input. If reverse voltage is
applied to the G650 Media Gateway and the 655A power supply, the 655A fuse will blow open
protecting the 655A power supply from damage. The fuse is located on each end of the rear
surface of the 655A power supply as shown in
switch on page 42. The DC input protection fuse and a spare are located in the two fuse
positions.
If the G650 Media Gateway will not operate on DC input (only), the fuse should be inspected by
removing the 655A power supply from the G650 Media Gateway and inspecting the protection
fuse.
A spare fuse (Comcode 700290158) is shipped with the power supply.

Mounting two to five G650 Media Gateways

Note:
In a multiple G650 Media Gateway configuration, put the G650s in the rack with
Note:
no vertical space between them. If the G650 Media Gateways are not mounted
adjacent with their fronts in the same vertical plane, the TDM/LAN cable(s)
cannot connect them.
When mounting more than one G650 Media Gateway in a rack, put:
1. A in the bottom of the rack
2. B directly above A
3. C directly above B
4. D directly above C
5. E directly above D
EMI gaskets provide Electro Magnetic Interference (EMI) to or from the TDM cable with the
outside environment. You must install the EMI gaskets before putting cabinets B, C, D, or E in
the rack.
To install the EMI gaskets:
1. Peel the paper backing from the gasket
2. Locate the unpainted outlined area on top of the G650 Media Gateway
3. With the gasket opening facing the rear of the rack, place the gasket on the:
on page 43.
Installing the TN2312BP IPSI adapter
Figure 7: 655A power supply fuse and ringer
on page 44.
Mounting two to five G650
Issue 2 January 2005 43