IAX Configuration

Asterisk
1

I’ve been using flynumber to redirect to an asterisk sip account but recently my internet provider made some changes to their infrastructure that is not allowing to get the calls thru SIP. I’m trying to use IAX account using this configuration sample: http://www.flynumber.com/iax-sample-configuration but I’m not getting audio both ways.

I already tested other provider and got audio and also IAX clients are getting audio both ways so it narrow to just flynumber.

Any help will be very appreciated.

2

Hi there

This sounds like a codec issue, can you check the configuration and make sure you’re using codecs we support

3

Thanks for your quick response.

I was trying to use GSM (to preserve bandwidth) and it appears on Flynumber side was requesting ulaw (G711).

-- Accepting UNAUTHENTICATED call from 46.19.209.77:
   > requested format = ulaw,
   > requested prefs = (),
   > actual format = gsm,
   > host prefs = (gsm),
   > priority = mine

With these settings I got no audio (my other IAX clients are currently using GSM without any issue). If I force IAX to use ulaw, my flynumber actually works.

-- Accepting UNAUTHENTICATED call from 46.19.209.77:
   > requested format = ulaw,
   > requested prefs = (),
   > actual format = ulaw,
   > host prefs = (ulaw),
   > priority = mine

Could there be an issue with Flynumber GSM codec using IAX?

Thanks.

4

Yes we support GSM codec when using the IAX protocol.

There should be no audio issues as long as the following IP range is enabled on clients firewall
side for RTP audio stream - 46.19.209.0/25 and 46.19.210.0/25.

Let us know if we can be of any further assistance.