Calls makes phone restart

[happydj]

Hi everyone,

After purchasing 2 of the excellent T48G units and setting them up to communicate with out local Asterisk server - one 1 of the phones, when I dial an external number (like my mobile/cell) my mobile/cell rings, but the Yealink phones screen turns black and it restarts - my mobile/cell continues to ring for a few seconds before stopping.

When I receive a call from an internal or external number, the phone crashes and restarts.

The Yealink then re-registers without any issues.

1 of the phones is working without any problems at all. However it is the other phone (same config just different extension number) which I'm having the issues.

Has anyone has any issues with this? The phone has been updated to the latest software.