Hello Experts,
What can be possible reasons for “SIP Cancel” during call setup failure cases?
This reason is coming as call failure cause!
Is it pegged on VoLTE MO/MT few times?
If it is I think it may be a temp reason.
This cancel generally comes in where call hangs up.
I think this below picture you can refer.
In short A party the caller hangs before the B Party recieves the call so instead of BYE A party recieves cancel request followed by 487 trigger.
Experts what can be the reason of SIP cancel message: “Sip cancel 481 call: Transaction does not exist”
Can you kindly enable LTE/NR events in XCAP to check reason for release by network?