VoLTE SIP BYE message with cause RTP/RTCP timeout

4G LTE
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1

Hi all.
Someone maybe knows, in VoLTE: SIP BYE msg with the cause RTP/RTCP timeout is alway sent from UE or can be sent from the Network?
I don’t have B side to check and always this call release I see on DL side so to be sure that the problem is on UE on the B side or to investigate further on the Network side.

2

Check your timer.

3

This timer is 10-15 seconds.
RTP timeout timer.

4

Is this timer in UE?

5

There is timer set at Core, If there are no RTP been sent with specific timer.
How long do you get the RTP.

6

That is the tricky. I can see normal RTP packet flow until I get BYE msg with the cause RTP timeout
RF good and no HO.
But I don’t have the B side to check.
So this buy msg could be from Network then?

8

Maybe dedicated bearer is not set up at the begining of the call