Hi Marek, The answering party is responsible for reinviting a call from audio to T.38. This should happen whether or not the calling party offers T.38 as an option in the SDP of the INVITE. A T.38 capable box should attempt a re-invite to T.38, and fall back to the current codec if that doesn't work out. We never received a reinvite, so we kept working in VoIP mode.
It is actually pretty useless to enable T.38 over RTP. I've yet to find a box which supports it, and currently we don't support it will proper error correction (there is, of course, some connection between those two things :-) ). T.38 over UDPTL seems to be a dead end, as it will never support encryption the way RTP will. However, right now RTP just isn't supported by very many things. Regards, Steve Marek Zelem wrote: > Hi > > My yesterday's message is waiting for moderator because I attached logs. > I am sending it again without logs. Originally attached files can be found > at: > http://marek.terminus.sk/cw/callweaver_incoming_fax.tcpdump.gz > http://marek.terminus.sk/cw/full.gz > > Here is text of the message: > > Hi again > > I am sending requested logs and tcpdump. > > I did exactly following: > 1. Start Callweaver with full loging > 2. Via CLI I set everything stated on the wiki > 3. Start tcpdump > 4. I sent fax from outside to ISDN number. > fax machine outside ---> ISDN ---> USB ISDN adapter ---> chan_capi ---> > ---> T38Gateway(SIP/oldfax) ---> SIP ATA with T38 ---> Faxmodem > 5. Stop tcpdump > 6. Stop Callweaver > > Fax transmission was not successful. > > If anything else is needed, please tell me what can I do. > > BTW, I have asterisk installed on the same machine (not running during > this test) with almost same configuration. I observe that callweaver seems > to me somehow maybe slower. When I do voice call through asterisk it is > smooth and clear but the same call through callweaver is not so clear, it > seems like not all packets arived on time or so. It is just subjective > feeling. I will try to measure it more exactly. Just wondering whether it > can be related to reliability of t38 fax. > > Please let me know if you need me to test anything. > > Thanks in advance > > Marek > > On Thu, 27 Mar 2008, Max CtRiX wrote: > > >> Marek Zelem ha scritto: >> >> >>> Can you please tell me what I am doing wrong? >>> >>> >> No, >> not without any log. >> Info on what's needed is in the wiki. >> >> Max >> _______________________________________________ >> Callweaver-users mailing list >> [email protected] >> http://lists.callweaver.org/mailman/listinfo/callweaver-users >> >> >> > > > Marek Zelem > -- > e-mail: [EMAIL PROTECTED] > web: http://marek.terminus.sk/ > pgp key: http://marek.terminus.sk/gpg.txt > _______________________________________________ > Callweaver-users mailing list > [email protected] > http://lists.callweaver.org/mailman/listinfo/callweaver-users > > _______________________________________________ Callweaver-users mailing list [email protected] http://lists.callweaver.org/mailman/listinfo/callweaver-users
