Avaya/Nortel 11x0 SIP Phones

sip.conf:
---------

[5000]
...
mailbox=5000@default
vmexten=5000

;; note: The vmail extension may be different from the phone exten.
...

1140eSIP.cfg:
----------------

[DEVICE_CONFIG]
DOWNLOAD_MODE   FORCED
VERSION         000092
FILENAME        1140DeviceConfig.dat

1140DeviceConfig.dat:
-------------------------
VMAIL 7000
VMAIL_DELAY 1000

## When un-commented, the next line will clear the admin password for phone configuration
## ADMIN_PASSWORD