Voice cutting issue .

[Skgroup]

Dear ,

I got 3cx v16 on cloud and am using sbc v16 too
sometimes i face voice cutting in some calls but the problem come and go alot
so how can i trace it ?

Best Regards

 

[AWS2P]

Hi ,
pbx and SBC are in latest version ? V16.0.2.910 and 16.0.386 for SBC
Do you have confortable bandwith on your internet link ?

Is firewall checker passes green?

What audio codec do you use ?
Call is from deskphone ? DECT? smartphone? WIFI connected?

 

[eddv123]

There was an issue in v15 SBC regarding RTP ports not being available, so please outline your version as above.

Do you have PBX delivers audio enabled/disabled on the extensions in question ?

Also check Windows Firewall is off (if using the Windows based SBC) and ensure the local adapter is in Private mode and not Public (as this will reject requests for unknown sources).

 

[Skgroup]

Hi ,
pbx and SBC are in latest version ? V16.0.2.910 and 16.0.386 for SBC
Do you have confortable bandwith on your internet link ?

Is firewall checker passes green?

What audio codec do you use ?
Call is from deskphone ? DECT? smartphone? WIFI connected?

- Yes i got latest version for both sbc and pbx

- yes i got 6 mega upload/download

- Yes and its hosted on cloud

- i make pbx deliver audio , codec for sip trunk is G.711 U-law

- Am using deskphone and 3cx softphone

 

[Skgroup]

There was an issue in v15 SBC regarding RTP ports not being available, so please outline your version as above.

Do you have PBX delivers audio enabled/disabled on the extensions in question ?

Also check Windows Firewall is off (if using the Windows based SBC) and ensure the local adapter is in Private mode and not Public (as this will reject requests for unknown sources).

- Am using version 16 with latest update

- Yes its enabled in extensions

- Am using sbc debian version

 

[eddv123]

PBX delivers audio on the extensions should not be required when using the SBC, only in remote STUN mode or when call recording (recording funnels traffic through the PBX as standard).

 

[AWS2P]

Is your data link dedicated to VOIP ? Your bandwith 6Mb/s is stable all day long or may decrease depending use and hours of day?
How many Phones do you have behind SBC ?

 

[Skgroup]

PBX delivers audio on the extensions should not be required when using the SBC, only in remote STUN mode or when call recording (recording funnels traffic through the PBX as standard).

okay i will disable it and test

Thank you

 

[Skgroup]

Is your data link dedicated to VOIP ? Your bandwith 6Mb/s is stable all day long or may decrease depending use and hours of day?
How many Phones do you have behind SBC ?

what does you mean by dedicated to voip ?
-Yes it stable
-12 phone

 

[AWS2P]

what does you mean by dedicated to voip ?

is the link used exclusively for IP telephony? or is it also used for all other uses of the company?

 

[JohnS_3CX]

Since you are using the new SBC you can also set the logging to verbose and check your logs during the times of the issue and see if anything shows up. https://www.3cx.com/docs/3cx-tunnel-session-border-controller/

 

[Skgroup]

is the link used exclusively for IP telephony? or is it also used for all other uses of the company?

No its dedicated for voip only .

 

[Skgroup]

Since you are using the new SBC you can also set the logging to verbose and check your logs during the times of the issue and see if anything shows up. https://www.3cx.com/docs/3cx-tunnel-session-border-controller/

is there any guide to understand sbc logs or not ?

 

[AWS2P]

I don't think so, logs to verbose are 3CX related not only SBC

 

[Skgroup]

I active network capture on pbx and i get this log and i want to know what does it mean

6181 5.429813 41.xx.xx.xx 104.xx.xx.xx SIP 960 Unknown request: x\003\207\374Sip0REGISTER sip:xxxxx.my3cx.ca:5060 |

 

[AWS2P]

Your trunk is not registred ? It seems you send something wrong to your sip provider?