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SalamPK86263
Beginner

Problems with sound quality Jabber

Hi All,

We are facing audio packet loss issue while making or receiving Jabber PSTN calls Via VPN .We are unable to properly hear the person on the other end .This is happening only for PSTN calls  .At the moment we don't have  option to check calls from office LAN or Physical phone as all are WFH

 

Below scenarios tested .

 

Jabber to Jabber :: Audio works fine.
Jabber to another internal phone(Jabber & CIPC) ::Audio Works fine
CIPC VPN to PSTN calls (Inbound and Outbound) :: Audio Works fine
Jabber VPN to PSTN calls (inbound and outbound) ::Audio issue Receive (25 % to 96% packet loss) PFA
Jabber VPN to other branch office PSTN( i.e.: if i route call via any other location PSTN by changing DP and CSS ) :: Audio works fine.it looks like have issue only with single branch office


In packet capture observed Wrong sequence number in voice gateway to jabber RTP stream and lost pack count is 96%
jabber to voice gateway RTP stream looks good and 0 % packet loss

 

 

Call flow:-

Jabber VPN - CUCM 10.5- H323 -Gateway -T1 PRI

 

Any idea Where to check

Any difference SCCP and SIP device protocol here ?

1 REPLY 1
Nithin Eluvathingal
VIP Advocate

You should check the connectivity from the gateway to the network where you face packet drops.

 

 

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