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IP Softphone and KX-TDA30 - no audio

IP Softphone and KX-TDA30 - no audio

IP Softphone and KX-TDA30 - no audio


I have KX-TDA30 and IP-EXT4. I used it with KX-NT136 IP phone and it worked flawlessly. But when I installed IP Softphone on a PC in the same network it didn't work. It connected to the PBX and I could dial an external number, but there was no audio (even after pressing 'SP-PHONE' button). I checked IP traffic and there are only packets sent between ports 9300-9301 and 2427-2727 when I pick up the phone. No other traffic comes out of the PBX (the router doesn't filter it anyway, because KX-NT136 works). What could be the reason?

Best regards,


RE: IP Softphone and KX-TDA30 - no audio

TDA30 has to be ver. 4.0000 or later

Can you connect and speak to an analog extension? Is there any problems in this case?

Telephone communication like an air: you do not notice it until you spoil it.

RE: IP Softphone and KX-TDA30 - no audio

It is 4.0, because earlier versions didn't support IP-EXT4, so I had to upgrade.

I can connect from the softphone to analog extension or to external number - everything on the "signaling" level works. I have messages displayed on the LCD in the softphone, etc. But there is no audio in both directions.

A regular IP phone (KX-NT136) works in the same place, so it's surely not a network or firewall issue.

Best regards,

P.S. To be clear: I mean the IP softphone, the software run on a PC to "emulate" a regular phone, I think it's product code is KX-NCS8100. I'm testing it in 60-days test mode without license.

RE: IP Softphone and KX-TDA30 - no audio

Well, I think you have a Panasonic Unified PC Maintenance Console (UPCMC) to maintaine your PBX, don't you?
If yes, you can try the following:
1) connect your PC (with UPCMC installed on it) instead of PBX,
2) install UPCMC onto PC with IP-Softphone KX-NS8101,
3) start VoIP Test Tool (that is built in UPCMC) at both PCs to check your network conditions

Also it can be a problem of software installation, try to re-install IP-softphone under Administrator permissions.

You should to choose an option "IP-Extension card installed in KX-TDA/KX-TDE (License is required in this PC)" in "IP Extension type selection" dialogue window when starting up the application.

One more point of problem appearance could be at your PC-audio (it is just an assumption).

Telephone communication like an air: you do not notice it until you spoil it.

RE: IP Softphone and KX-TDA30 - no audio

What version KX-NCS8100 do you use?

RE: IP Softphone and KX-TDA30 - no audio

Panasonic IP Softphone Version


RE: IP Softphone and KX-TDA30 - no audio

I installed older version - - and it works :)

Perhaps v5.0 requires 5.0 firmware in the PBX?


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