No Outgoing Audio

[Bert1]

I had some problems with my installation when I moved my office and most have been resolved. However, there is still no outgoing audio. I can make calls without a problem but the recipient cannot hear what I am saying. I did run the firewall checker and it doesn't report a single problem. Any other suggestions?

Bert

 

[leejor]

I assume that you now have a fibre to Ethernet "box" from your ISP. Can you (have you) confirm(ed), with them, that there is no internal firewall, router, or other settings, that may require changing.
What steps did you go through to change your public IP?

 

[Bert1]

I assume that you now have a fibre to Ethernet "box" from your ISP. Can you (have you) confirm(ed), with them, that there is no internal firewall, router, or other settings, that may require changing.
What steps did you go through to change your public IP?

No, their equipment - whether cable or fiber - is simply a modem with no intelligence built in aside from throttling software to set the data rate.

All I had to do was to change the external ip address listed in the 3CX-specific rules. That's it.

Bert

 

[Bert1]

Hi Bert,

Just so things dont get confusing, you will need to eliminate the following suspects starting top-down during outgoing calls

1. PBX - do the audio packets leave from its NIC?
2. Firewall - do the packets leave from its WAN port?
3. Provider - do they receive audio from you?

Each of the above step, needs a capture on its own interface. Wireshark will not show you if something was blocked. It will show you if something was sent. If it wasnt sent, then you know which suspect to focus on.

I just heard back from IXICA. They monitored a test call and they are getting no rtp traffic from my site during a call. So, it appears that it is either the firewall or something in 3CX.

Bert

 

[leejor]

So...now , using Wireshark, check traffic on either side of the firewall.

 

[JohnS_3CX]

@Bert1 great, you did step 3, now you need step 1 to see if the PBX tries to send audio