[asterisk-users] T.38 negotiation error

[Kevin P. Fleming]

On 02/03/2011 07:30 PM, Marcello Colucci (SIRIO Informatica s.a.s.) wrote:
> Hi, I have asterisk 1.6.2.6 on a Debian Lenny system.

The current version is 1.6.2.16.1, and 1.6.2.17 is on the way (in 
release candidate mode). Is there some reason why you are running an old 
release?

> When I try to send a fax in T.38 mode I receive this error
>
> ERROR[15035]: res_fax.c:795 set_fax_t38_caps: channel
> 'SIP/eutelia-sirio-out-00000000' is in an unsupported T.38 negotiation
> state, cannot continue.

You have not reported the version of res_fax and res_fax_digium that you 
are using.

Given that your Asterisk version is quite old (nearly a year) and you 
may not be running the last FAX modules either, any attempt to help you 
out would be just guessing... because you could easily be experiencing a 
problem that has already been fixed. There have been many fixes to T.38 
negotiation in Asterisk since March of 2010.

If I had to guess, though, I would think that that receiver of this call 
has sent your system a T.38 re-INVITE before you started SendFAX 
running. If that is the case, this problem has already been solved and 
upgrading will take care of it.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kfleming at digium.com
Check us out at www.digium.com & www.asterisk.org