Trouble wiht external extension

[hoosier1077]

Hello,
I have a 3cx server all setup in my office with a voip provider, and everything is working great. I tried to test out the external extension with a Linksys SPA921. I have configured my office firewall that sit in front of the 3cx server exactly as instructed, and have a static public ip and port mapping completed as well as instructed. I am not using a stun server because I believe I read in many posts that if you have a static public ip, you should turn stun off. So I take the external extension home and set it up on the sip manger with my public ip. My router at home is a simple dlink router that has not firewall, nothing else using the viop/sip ports that are required for 3cx to function. At home I do not have a static public ip, so ive tried configuring the phone with and without stun server. Both ways I am able to call out and receive, however I have not outbound audio. Anything I say into my spa921, cannot be heard on the other end. I can hear them just fine though. The router also has a simple “sip” check box within the setup, not sure what its for, but it is checked. I have also tried unchecking it but got same result. Any help would really be appreciated. Thanks.

 

[mfm]

Hi,

Firs things first, i have set up a lot of these phones externally and i find that they do work quite often, however from 3cx perspective we recommend using the 3CX sip proxy tunnel releaving you of any grief.

First things first, I realise you been trough most of these steps but I will go trough them again.

1. Ensure you have done all the correct port fowarding on your router. Any SIP alg on your router must be disabled.
http://portforward.com/english/applications/port_forwarding/3CX/3CXindex.htm

2. Run the firewall checker and ensure there are no warnings.

3. Paste screenshots of the setting of your device blanking out your ips and usernames please or i will delete your post immediatley for your own safety.

4. If all else failes, wireshark is your friend, pm me with a link to a capture and I will help you, DO not publicy display this link or again I will delete your post for your own safety.

 

[hoosier1077]

Thanks for the reply. I have no problem using the tunnel application, and was able to get it working fully functional on the 3cx softphone. However when I tired to use the tunneling software along with the spa921, I have audio problems as well. I followed the setup config for the tunneling but had no luck. As the video said Im using the private ip of the 3cx server in the proxy field, and the private ip:5080 of the pc running tunneling software at the remote location. Tunnel looks like its up and running, and can even get to register, but just no luck fully functional audio.

 

[hoosier1077]

Just thought I would update you guys since its up and working now. I just used the 3cx tunneling application on my pc at the remote location. I had everything setup on the phone istelf exepct there is an option to "use outbound proxy." I had the information put in correctly, however I also had to change that field from no to yes. Seems to be getting two way audio now, ive given up on trying without the tunneling service. Thanks for helping me out yesterday.

 

[mfm]

Hi,

Your welcome, I am happy to hear you've got it set up properly now.

 

[badsushi]

Go to extensions/other tab and check PBX Delivers Audio for that remote extension.

Try again without the tunnel proxy.

Should work.