Re: [asterisk-users] Asterisk translates 200 OK + SDP into 488 not acceptable here after both side agreed on codec.
On Fri, Apr 28, 2023 at 10:43 AM Benoît Panizzon wrote: > Hi List > > Asterisk 16.28.0 in use. > > PJSIP in use > Two endpoints > Both using IPv6 > > One Endpoint on UDP, the other via TLS. > > Both with: > > t38_udptl=yes > ;fax_detect=yes > ;fax_detect_timeout=30 > rtp_ipv6=yes > > Both sides are T.38 capable and detect fax tone so no need for fax > detection on asterisk. > > Voice calls between the two work fine. > > But on a Fax call, I see this situation: > > A <=> Asterisk <=> B > > A: INVITE + Audio SDP => Asterisk => (same SDP) => B > > B: 200 OK + Audio SDP => Asterisk => (same SDP) => A > > * B Detects Fax-Tone! > > B: Re-Invite + UDPTL => Asterisk => (same SDP) => A > > A: 200 OK + UDPTL => Asterisk => 488 => B > > I tweakted the udptl setting in various ways, but I am unable to figure > out, why Asterisk is sending a 488 to B, after it first happily > forwarded the SDP to A and got confirmation from A it was happy to > accept that DSP. > > You could enable core debug and see if there's any insight, otherwise you'd have to actually provide the full traces. Asterisk also doesn't forward SDPs between sides so they're not the same SDP. -- Joshua C. Colp Asterisk Project Lead Sangoma Technologies Check us out at www.sangoma.com and www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- Check out the new Asterisk community forum at: https://community.asterisk.org/ New to Asterisk? Start here: https://wiki.asterisk.org/wiki/display/AST/Getting+Started asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[asterisk-users] Asterisk translates 200 OK + SDP into 488 not acceptable here after both side agreed on codec.
Hi List Asterisk 16.28.0 in use. PJSIP in use Two endpoints Both using IPv6 One Endpoint on UDP, the other via TLS. Both with: t38_udptl=yes ;fax_detect=yes ;fax_detect_timeout=30 rtp_ipv6=yes Both sides are T.38 capable and detect fax tone so no need for fax detection on asterisk. Voice calls between the two work fine. But on a Fax call, I see this situation: A <=> Asterisk <=> B A: INVITE + Audio SDP => Asterisk => (same SDP) => B B: 200 OK + Audio SDP => Asterisk => (same SDP) => A * B Detects Fax-Tone! B: Re-Invite + UDPTL => Asterisk => (same SDP) => A A: 200 OK + UDPTL => Asterisk => 488 => B I tweakted the udptl setting in various ways, but I am unable to figure out, why Asterisk is sending a 488 to B, after it first happily forwarded the SDP to A and got confirmation from A it was happy to accept that DSP. Any hint? -- Mit freundlichen Grüssen -Benoît Panizzon- @ HomeOffice und normal erreichbar -- I m p r o W a r e A G-Leiter Commerce Kunden __ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 PrattelnFax +41 61 826 93 01 Schweiz Web http://www.imp.ch __ -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- Check out the new Asterisk community forum at: https://community.asterisk.org/ New to Asterisk? Start here: https://wiki.asterisk.org/wiki/display/AST/Getting+Started asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
