If you are getting messages such as the one below, chances are big you are trying to connect to a Cirpack/v4.39a (gw_sip) sip gateway or to a Mediatrix 1124 gateway



This is because those 2 devices for some reason decide to send DTMF as a dynamic payload type 96, and asterisk expects the DTMF to have number 101 or 121.

We can easily fix this with a one line patch to rtp.c

Look for:



and change this to:



now recompile asterisk, and everything should work fine.

References:

seems to happen on SPA
http://www.asterisknerds.com/logs/irclogger_log/asterisk?date=2005-05-05,Thu&text=on

I've never seen this one myself, but by googling around this is probably:

1) you are using info for DTMF with xlite. (unconfirmed)

2) you are using an asterisk version older than 12-06-04 and have allow=all (which means you should upgrade)

3) Most probable: something is sending RTCP packets in the RTP datastream to asterisk and asterisk doesn't know what to do with it.


references:

This one seems to be a problem similar to unknown codec 96 received (see above).
It appears when DTMF is being sent on the PSTN phone connected to a cisco as5350, and sent to asterisk over RTP Named Telephone Event (RFC 2833).

The solution is probably a patch as in the unknown codec 96, or reconfiguring the cisco gateway.

(please let us know how you fixed this, if you encounter this problem)

references:

I only found one reference to this problem, possibly a problem where allow=all is used. (don't use that)
If that doesn't fix it, try upgrading your asterisk, chances are big the problem is already fixed.

If you experience this problem and can or cannot fix it, please let us know!!!!

references:

You probably connected some fax to some ATA, and then try to send faxes over t.30 to asterisk, this is not good, this fails in almost all cases.

The real solution is to use a t.38 enabled ATA and patch asterisk to use t.38.

references:

Same as the problem above, you probably tried to connect some fax to an ATA, this is what might happen during the fax training.

ATA's are not made to be connected to faxes unless they are t.38 capable.

If it doesn't work, give up now, its not meant to be used like that.