Yealink T33G Phones Show “No Service” via 3CX SBC While Grandstream Phones Work

[Alphabetic]

Nevermind, i dont think it would make a difference.

Are you able to enable wireshark on the SBC and confirm you see the registration attempt from the phone?

 

[Aldakheeloud]

Nevermind, i dont think it would make a difference.

Are you able to enable wireshark on the SBC and confirm you see the registration attempt from the phone?

we have Debian SBC Server..Here i can,t see registration attempt.only show phone which already registration

 

[Alphabetic]

You'd need to stick your SBC into verbose logging and probably have to restart it. Try the phone registration, pull the logs off the SBC and then use Wireshark to check if the traffic from the phone is hitting it. If it isnt, then you have a routing issue.

you could also first try a capture from the 3CX mgmt console but if it doesnt hit it, you'll need to troubleshoot back from the SBC.

https://www.3cx.com/docs/capture-network-traffic/

 

[Aldakheeloud]

i Attact the pcap file.

 

[Aldakheeloud]

Wireshark

 

[Alphabetic]

Wireshark

Maybe pcaps are blocked you might have to change the extension to .txt first

 

[Aldakheeloud]

Txt File

 

[Aldakheeloud]

Zip

 

[Alphabetic]

Run the capture again and zip it up, this file is corrupt.

Are you running this off the SBC or 3CX?

 

[Alejandro_3CX]

Hi @Aldakheeloud just a quick question, if you provision the same user extension but using the 3CX application on your smartphone, does it register or not? try it using Mobile Data and another test with the WiFi connection using the same LAN as the phone.