Hi david,
I am very interested by what you do.
How did you configure fax over IP using T.38 with
callweaver?
I work on the fax over IP with T.38 project with
callweaver but i don't know how to do? how to
configure sip clients and extensions.conf file for
switching between fax and call.
how to detect fax or call with callweaver?
how to send and receive fax?
How did you configure your extensions.conf?
could you help me.
Thanks
Hermann KANGA
--- David <[EMAIL PROTECTED]> a écrit :
> Hi,
>
> OK, So by disabling all the FEC related fields in
> the udptl.conf file and activating the redundancy,
> it works. I wonder if there's a manual that explains
> the content of this file and which SDP fields can be
> modified by it. Right now, I'm sending this, but
> only very few of the fields are configurable through
> the file:
> Session Description Protocol Version (v): 0
> Owner/Creator, Session Id (o): root 4042 4043 IN IP4
> 192.168.1.6
> Session Name (s): session
> Connection Information (c): IN IP4 192.168.1.6
> Time Description, active time (t): 0 0
> Media Description, name and address (m): image 17636
> udptl t38
> Media Attribute (a): T38FaxVersion:0
> Media Attribute (a): T38MaxBitRate:14400
> Media Attribute (a): T38FaxFillBitRemoval:0
> Media Attribute (a): T38FaxTranscodingMMR:0
> Media Attribute (a): T38FaxTranscodingJBIG:0
> Media Attribute (a):
> T38FaxRateManagement:transferredTCF
> Media Attribute (a): T38FaxMaxBuffer:400
> Media Attribute (a): T38FaxMaxDatagram:400
> Media Attribute (a): T38FaxUdpEC:t38UDPRedundancy
>
>
> Now, I have another problem. Some faxes are not
> received. I made several calls and in the log trace,
> the only difference I found between successful calls
> and failed ones is the order of these tasks:
>
> Good Call:
> -- Executing SipT38SwitchOver("SIP/WS00-bae7",
> "")
> Sep 10 21:35:16 NOTICE[966670]: channel.c:669
> opbx_channel_perform_set_t38_status: Setting t38
> status to 1 at chan_sip.c:16741
> -- Executing RxFAX("SIP/WS6500-bae7",
>
"/usr/local/var/spool/callweaver/fax/1/1189452914.10.tif,debug,ecm")
> Sep 10 21:35:16 NOTICE[163848]: channel.c:669
> opbx_channel_perform_set_t38_status: Setting t38
> status to 2 at chan_sip.c:4783
> -- Executing Hangup("SIP/WS6500-bae7", "")
>
> Another Good Call:
> -- Executing SipT38SwitchOver("SIP/WS00-12cd",
> "")
> Sep 10 22:41:58 NOTICE[1114126]: channel.c:669
> opbx_channel_perform_set_t38_status: Setting t38
> status to 1 at chan_sip.c:16741
> -- Executing RxFAX("SIP/WS6500-12cd",
>
"/usr/local/var/spool/callweaver/fax/4/1189456917.12.tif,debug,ecm")
> Sep 10 22:41:58 NOTICE[163848]: channel.c:669
> opbx_channel_perform_set_t38_status: Setting t38
> status to 2 at chan_sip.c:4783
>
> Failed Call:
> -- Executing SipT38SwitchOver("SIP/WS00-28a3",
> "")
> Sep 10 21:32:00 NOTICE[901134]: channel.c:669
> opbx_channel_perform_set_t38_status: Setting t38
> status to 1 at chan_sip.c:16741
> Sep 10 21:32:01 NOTICE[163848]: channel.c:669
> opbx_channel_perform_set_t38_status: Setting t38
> status to 2 at chan_sip.c:4783
> -- Executing RxFAX("SIP/WS6500-28a3",
>
"/usr/local/var/spool/callweaver/fax/4/1189452719.9.tif,debug,ecm")
> -- Executing Hangup("SIP/WS6500-28a3", "")
>
> Another Failed Call:
> -- Executing SipT38SwitchOver("SIP/WS00-b752",
> "")
> -- Executing RxFAX("SIP/WS6500-b752",
>
"/usr/local/var/spool/callweaver/fax/4/1189456681.11.tif,debug,ecm")
> Sep 10 22:38:03 NOTICE[1032206]: app_rxfax.c:499
> rxfax_audio: Switching to generator mode
>
> Questions:
> 1. What are t38 status values 1 & 2 representing?
> 2. Is there a problem in the code that causes the
> application not to run the tasks in the proper
> order?
> 3. What's "generator mode"?
>
> Thanks,
>
> David
>
> ----- Original Message ----
> From: Max CtRiX <[EMAIL PROTECTED]>
> To: Users Mailing List - Non-Commercial Discussion
> <[email protected]>
> Sent: Monday, September 10, 2007 5:40:45 PM
> Subject: Re: [Callweaver-users] T.38 FEC
>
> Max CtRiX ha scritto:
> > Steve Underwood ha scritto:
> >> David wrote:
> >>> Hello list,
> >>>
> >>> Does anyone know if it's possible to disable
> FEC, when sending T.38
> >>> reINVITE and if yes, how?
> >>>
> >>> A carrier we're working with doesn't support it
> (only redundancy).
> >> The should not be an option for this. This is
> something which is
> >> negotiated, and should sort itself out
> automatically. If you have found
> >> a case where the negotiation isn't working,
> please file an error report,
> >> with a log file showing what happens.
> >>
> >
> > Particularly, on incoming calls it's automatic.
> > On outgoing calls, the preferred behaviour is
> managed in udptl.conf.
> >
>
> i should shut up today.
> It's the opposite of what i wrote.
>
> Max
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