Call failed, unknown log

someone could help me with this, I had never seen it and I do not quite understand what it refers to.

thanks for your help.

[Sep 15 07:32:34] – Executing [0+53v||||||||||||||||||1023@admin:1] NoOp(“SIP/8567-0005b730”, “”) in new stack
[Sep 15 07:32:34] – Executing [0+53v||||||||||||||||||1023@admin:2] VoiceMail(“SIP/8567-0005b730”, “0+53v||||||||||||||||||1023@default”) in new stack
[Sep 15 07:32:34] – Executing [0+53v||||||||||||||||||1023@admin:3] Hangup(“SIP/8567-0005b730”, “”) in new stack
[Sep 15 07:32:34] == Spawn extension (admin, 0+53v||||||||||||||||||1023, 3) exited non-zero on ‘SIP/8567-0005b730’

It is a trace of the execution of the dialplan. You need to ask the person who wrote the dialplan, as this represents end user customisation.

Reverse engineering a complete dialplan is beyond the scope of a peer support forum.

The fragment you have shows a call from a SIP device (phone or “trunk”) being successfully directed to voice mail.