[asterisk-users] No media being sent in SIP call

[Philipp von Klitzing]

Hi!

> I've turned off t.38 and all of the codecs except ulaw; I still have the
> same problems.  SOMETIMES it works.  Other times, the sniffer clearly
> shows that the media simply isn't being sent.  NOTHING is being sent.
> 
> Anything else I should check?

Look at the firewalls and possible SIP ALGs that are between the devices. 
Check for UDP port forwarding settings, and check that the RTP ports that 
have been negotiated for the call are not conflicting with those of other 
devices/calls/port forwarding settings.

Philipp