Be aware if you go to 7.0 you MUST stop at 6.1 first to retain your configuration, system ID and keycodes. Otherwise you will lose it.

If they are using a NAM voice mail it will need to be 4.1 and yuo MUST upgrade the NAM first.


Marv CCNA, CTUB
TeleMarv Services (Retired)
Providing telecommunication solutions in Ottawa Canada since 1990