Voice delay VoLTE only in outgoing call

4G LTE
1

Hi,
I have a problem with sound delay during outgoing calls. My voice reaches the other person with a noticeable delay. This issue does not occur when my conversation partner calls back. When I hold both phones to my ears, the delay is only noticeable during outgoing calls. What could this be?

obraz
obraz575×675 120 KB

2

Hi @mati5000 Can you please clarify some points;

  • Do you have the problem with always the same UE?
  • Are both UE’s are being served by same PGW and same P-CSCF?
  • If no have you tried switching the PGW and P-CSCF?
  • Does P-CSCF and PGW located on the same data center?
3

Not enough information to answer the question.
Are you and your partner in the same country same operator?
How long is the delay 1 second 2 second?
Have you heard the rings before B party answer the call? I need few of those questions ansewered to give ahint.