log 2 %CALL_CONTROL-6-CALL_LOOP: The incoming call has a global identfier already present in the list of currently handled calls. It is being refused
This message informs you that the AS5400 has received an incoming voip call generated from itself.
In a SIP scenario the unique global identifier is the SIP CALL-ID. When the AS5400 creates a new voip call leg, generates a new and unique CALL-ID. If it receive a call with the same CALL-ID it's a loop.
The loop must be block.
Try to identify and eliminate the loop cause.
Check your telephony routing, dial-peers configuration, hunting and huntstop, decrease max forward numbers, etc.
log 1. SSERTION FAILED: file "../as/if_as_tdm.c", line 2923 -Traceback= 0x601FF08C 0x602E6E44 0x6261DE7C 0x628BE2F8 0x61C8C548 0x61775148 0x61775610 0x61C77690
This sounds like a software crash of if_as_tdm.c program.
This is probably caused by an unmanaged exception.
Try to upgrade your IOS. the last release is 12.4-25d or 12.4-15T14.
Best regards.