Call suddenly dropped

Hello all
This is the thing, few calls during the day are suddenly dropped in the middle of the conversation. I know that it could be because of a bunch of reasons.
I grabbed these messages from CLI that might give a clue to expert eyes.
Call established:
and then for no apparent reason the call was dropped after 223 seconds of dialed
is this helpful to identify what happened?
Thanks
This is the thing, few calls during the day are suddenly dropped in the middle of the conversation. I know that it could be because of a bunch of reasons.
I grabbed these messages from CLI that might give a clue to expert eyes.
Call established:
55328 [Nov 18 20:03:47] VERBOSE[24586] logger.c: [Nov 18 20:03:47] -- Executing [8600052@default:1] MeetMe("Local/8600052 @default-1c40,2", "8600052|F") in new stack
55329 [Nov 18 20:03:47] VERBOSE[24585] logger.c: [Nov 18 20:03:47] > Channel Local/8600052@default-1c40,1 was answered .
55330 [Nov 18 20:03:47] DEBUG[24586] app_meetme.c: Placed channel Local/8600052@default-1c40,2 in ZAP conf 1022
55331 [Nov 18 20:03:47] VERBOSE[24587] logger.c: [Nov 18 20:03:47] -- Executing [852018717210757@default:1] AGI("Local/86 00052@default-1c40,1", "agi://127.0.0.1:4577/call_log") in new stack
55332 [Nov 18 20:03:47] VERBOSE[24587] logger.c: [Nov 18 20:03:47] -- AGI Script agi://127.0.0.1:4577/call_log completed, returning 0
55333 [Nov 18 20:03:47] VERBOSE[24587] logger.c: [Nov 18 20:03:47] -- Executing [852018717210757@default:2] Dial("Local/8 600052@default-1c40,1", "SIP/sip_iVoice/528717210757||tTor") in new stack
55334 [Nov 18 20:03:47] VERBOSE[24587] logger.c: [Nov 18 20:03:47] -- Called sip_iVoice/528717210757
55335 [Nov 18 20:03:50] VERBOSE[24587] logger.c: [Nov 18 20:03:50] -- SIP/sip_iVoice-0835e928 is making progress passing it to Local/8600052@default-1c40,1
55361 [Nov 18 20:03:54] VERBOSE[24587] logger.c: [Nov 18 20:03:54] -- SIP/sip_iVoice-0835e928 answered Local/8600052@defa ult-1c40,1
and then for no apparent reason the call was dropped after 223 seconds of dialed
55756 [Nov 18 20:07:30] VERBOSE[24587] logger.c: [Nov 18 20:07:30] == Spawn extension (default, 852018717210757, 2) exited non-zero on 'Local/8600052@default-1c40,1'
55757 [Nov 18 20:07:30] VERBOSE[24587] logger.c: [Nov 18 20:07:30] -- Executing [h@default:1] DeadAGI("Local/8600052@defa ult-1c40,1", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----16-----ANSWER-----223-----216") in new stack
55759 [Nov 18 20:07:30] VERBOSE[24586] logger.c: [Nov 18 20:07:30] == Spawn extension (default, 8600052, 1) exited non-zero on 'Local/8600052@default-1c40,2'
55760 [Nov 18 20:07:30] VERBOSE[24586] logger.c: [Nov 18 20:07:30] -- Executing [h@default:1] DeadAGI("Local/8600052@defa ult-1c40,2", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----0---------------") in new stack
is this helpful to identify what happened?
Thanks