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Chapter 4 Replacing Components
Avaya M770 User’s Guide 17
Replacing a Supervisor Module (M-SPV/M-SPX)
Caution: The M-SPV/M-SPX is essential to the correct functioning of the Avaya
M770. It is therefore recommended to have two modules installed at all times.
However, you cannot install both an M-SPV and an M-SPX module in the same hub.
Either of the two M-SPV/M-SPX modules can be replaced without powering down
the Avaya M770 hub. If one slot is empty, insert the new module into the empty slot
and wait one minute before removing the module you wish to replace. The new M-
SPV/M-SPX automatically inherits the configuration of the main M-SPV/M-SPX
within one minute.
For more detailed information about the M-SPV/M-SPX please refer to the M-SPV
and M-SPX Installation Guides.
Inserting the M-SPV/M-SPX in the Hub
At the back of the Avaya M770 hub there are two slots for two M-SPX modules.
The M-SPX can be installed or removed while power is applied to the enclosure.
1 Insert the M-SPX into an available slot in the back of the hub. Plug in the
module by pressing firmly on the mid-section of the front panel.
2 Secure the module by folding the modules handles, and fastening the two
retaining screws. Do not over-tighten the screws.
3 If you intend to install two M-SPX modules into the hub, first insert one of them
and configure it completely as detailed in Chapter 3 of the M-SPX Installation
Guide. Next insert the second M-SPX, and it will auto-configure itself
identically to the first M-SPX (within 5 minutes).
Connecting the Console Terminal
Initial software configuration of the M-SPX is done using a console terminal
connected to the Console connector on the front of the Avaya M770 hub. Refer to the
Appendix for connector pin assignments.
To connect the Avaya M770 to a console terminal:
1 Turn on the VT100 terminal (or PC terminal emulator in VT100 or VT52 mode)
and set its communication parameters to:
Baud rate: 9600 bps
Start bit: 1
Data bits: 8
Stop bit: 1
Parity: None