One Way Audio

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BADhills

New Member
Feb 2, 2018
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Hi there,

i setup fusionpbx and the extensions and got the isdn gateway to work.

Now i have the problem, that the audio is only one way. Directly after setup everything, the audio works two ways and i don't know what changed sinced them.

I saw into sngrep, but i found nothing false there. Any hints, how the output should be for normal activities and one-way Audio NAT problems?

The only firewall, that could be interfering ist the one on the fusionpbx

Output of IPTABLES -L
https://pastebin.freeswitch.org/view/0f166a41

What more infos should i provide?

kind regards,
Markus
 

BADhills

New Member
Feb 2, 2018
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40
Hi there.

i get further into the problem.

I've setup everything new. One-way Audio problem still remains. But now sngrep shows it. The Audio stream got only in one direction on outbound calls.
On inbound calls, there is no problem.

Here are some pictures of sngrep.
First inbound calls with no problem:
https://ibb.co/j5kY0x
https://ibb.co/gmXVfx
https://ibb.co/mrKXtH

And here outbound calls, with one-way Audio

https://ibb.co/fyoxSc
https://ibb.co/n5Mj7c
https://ibb.co/b45oYH

How can i figure out, if there is a codec problem, or a NAT problem?
Any Ideas?

greetings,
Markus
 

DigitalDaz

Administrator
Staff member
Sep 29, 2016
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try using tcpdump and paste the capture file, change the interface to suit:
Code:
tcpdump -i eth0 -n -s 0 port 5060 -vvv -w /home/capture_file_name.pcap
 

BADhills

New Member
Feb 2, 2018
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Thanks DAZ, troffaski in the IRC Channel gaves the deciding hint.

Because of the one-way audio, i changed the ext-sip ip and ext rtp ip to the settings suggested as in the fusionpbx documentation... autonat:xxx.xxx.xxx.xxx I changed here now the public ip, to internal ip and now i've audio in both ways.

Because i use my own Gateway and no external VoIP-Provider.

This solutions works for me, but when in the future comes an external voip provider comes along, i've to figure out a new solution. But now it works.
 
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