[Users] T.38 together with OpenSER+RTPProxy and OpenPBX not working - sr-users

Bogdan-Andrei Iancu

16 Nov 16 Nov

3:12 p.m.

New subject: [Users] T.38 together with OpenSER+RTPProxy and OpenPBX not working

Hi Bastin, probably there is kind of a RTP deadlock between the RTPproxy and OpenPBX - both are waiting for the other party to send the media before sending on its turn. try something like: if (nat_uac_test("8")) { force_rtp_proxy(); } else { force_rtp_proxy("r"); } refer to http://www.openser.org/docs/modules/1.2.x/nathelper.html for more details. regards, bogdan Bastian Schern wrote:

...

Hi everybody, I've got a question: Does anybody get T.38 working between OpenPBX and OpenSER + RTPProxy? The following scenarios are working fine: 1: SIP-FAX1 (pub. IP) <-> OpenPBX <-> SIP-FAX2 (pub. IP) 2: SIP-FAX1 (NAT) <-> RTPProxy+OpenSER <-> SIP-FAX2 (pub. IP) 3: SIP-FAX1 (NAT) <-> RTPProxy+OpenSER <-> SIP-FAX2 (NAT) 4: SIP-FAX1 (pub. IP) <-> OpenSER <-> OpenPBX <-> SIP-FAX2 (pub. IP) But the following scenario is not working: SIP-FAX1 (NAT) <-> RTPProxy+OpenSER <-> OpenPBX <-> SIP-FAX2 (pub. IP) It seems to be that the RTPproxy has a problem with the OpenPBX but no Problem with SIP-FAX-ATAs. Does anybody have an idea what's going wrong??? Cheers Bastian _______________________________________________ Users mailing list Users(a)openser.org http://openser.org/cgi-bin/mailman/listinfo/users

Reply

Bogdan-Andrei Iancu

4:03 p.m.

New subject: [Users] T.38 together with OpenSER+RTPProxy and OpenPBX not working

Hi Olle, nothing additional is required .... RTPproxy forwards the media as a binary stream without looking into....so, it can be RTP or UDPTL or whatever...blind relaying is done.. regards, bogdan Olle E Johansson wrote:

...

16 nov 2006 kl. 13.12 skrev Bogdan-Andrei Iancu:

Hi Bastin, probably there is kind of a RTP deadlock between the RTPproxy and OpenPBX - both are waiting for the other party to send the media before sending on its turn. try something like: if (nat_uac_test("8")) { force_rtp_proxy(); } else { force_rtp_proxy("r"); } refer to http://www.openser.org/docs/modules/1.2.x/nathelper.html for more details.

Does the RTP proxy handle UDPTL too, or do we need an UDPTL proxy? /O

Reply

Bastian Schern

17 Nov 17 Nov

2:13 p.m.

New subject: [Users] T.38 together with OpenSER+RTPProxy and OpenPBX not working

Hi Bogdan, I think it has nothing to do with a deadlock. I see the incoming and outgoing UDPTL traffic on both SIP-FAX devices. Do you got a suggestion for me, what I could do to locate and resolve the problem. Cheers Bastian --On Donnerstag, 16. November 2006 14:12 +0200 Bogdan-Andrei Iancu <bogdan(a)voice-system.ro> wrote:

...

Hi Bastin, probably there is kind of a RTP deadlock between the RTPproxy and OpenPBX - both are waiting for the other party to send the media before sending on its turn. try something like: if (nat_uac_test("8")) { force_rtp_proxy(); } else { force_rtp_proxy("r"); } refer to http://www.openser.org/docs/modules/1.2.x/nathelper.html for more details. regards, bogdan Bastian Schern wrote:

Hi everybody, I've got a question: Does anybody get T.38 working between OpenPBX and OpenSER + RTPProxy? The following scenarios are working fine: 1: SIP-FAX1 (pub. IP) <-> OpenPBX <-> SIP-FAX2 (pub. IP) 2: SIP-FAX1 (NAT) <-> RTPProxy+OpenSER <-> SIP-FAX2 (pub. IP) 3: SIP-FAX1 (NAT) <-> RTPProxy+OpenSER <-> SIP-FAX2 (NAT) 4: SIP-FAX1 (pub. IP) <-> OpenSER <-> OpenPBX <-> SIP-FAX2 (pub. IP) But the following scenario is not working: SIP-FAX1 (NAT) <-> RTPProxy+OpenSER <-> OpenPBX <-> SIP-FAX2 (pub. IP) It seems to be that the RTPproxy has a problem with the OpenPBX but no Problem with SIP-FAX-ATAs. Does anybody have an idea what's going wrong??? Cheers Bastian _______________________________________________ Users mailing list Users(a)openser.org http://openser.org/cgi-bin/mailman/listinfo/users

Reply