T46g crash/freeze and reboot

[blistovmhz]

Our receptionist uses a T46G (firmware SIP-T46G 28.72.0.1)
The phone has 5x EXP40 modules attached with roughly 70 or 80 BLF's.

The problem is that the phone is crashing and rebooting every day. My receptionist says the crash/reboot occurs under the following conditions:

Phone call in progress, another call comes into the phone, first call is ended or parked, incoming call shows up on screen like normal, and then the phone crashes and reboots. The screen apparently freezes for about 30 seconds but the phone continues to ring. After 30 seconds, the phone reboots.

I've included the log that I downloaded immediately after the last crash.