Summary: | ASTERISK-15619: SDP in a session refresh re-INVITE does not contain T.38 when it should | ||
Reporter: | Dmitry Panov (dop251) | Labels: | |
Date Opened: | 2010-02-12 16:22:29.000-0600 | Date Closed: | 2011-07-27 13:40:41 |
Priority: | Major | Regression? | No |
Status: | Closed/Complete | Components: | Channels/chan_sip/General |
Versions: | Frequency of Occurrence | ||
Related Issues: | |||
Environment: | Attachments: | ( 0) extensions.conf ( 1) ngrep.txt ( 2) sip.conf | |
Description: | I tried to send a rather long fax (58 pages) and found that the call is dropped after a while. It looks like it's because the re-INVITE which is sent to refresh the session contains usual audio codecs instead of T.38. [Feb 13 01:02:09] DEBUG[25129] chan_sip.c: Session timer expired: 28 - 8F3E8D271 4B0D9E642B252115B48C3EA-6011229@*********** [Feb 13 01:02:09] DEBUG[25129] chan_sip.c: ** Our capability: 0xc (ulaw|alaw) Vi deo flag: True Text flag: True [Feb 13 01:02:09] DEBUG[25129] chan_sip.c: ** Our prefcodec: 0x0 (nothing) [Feb 13 01:02:09] DEBUG[25129] chan_sip.c: -- Done with adding codecs to SDP [Feb 13 01:02:09] DEBUG[25129] channel.c: Internal timing is disabled (option_in ternal_timing=0 chan->timingfd=35) [Feb 13 01:02:09] DEBUG[25129] chan_sip.c: Done building SDP. Settling with this capability: 0xc (ulaw|alaw) After receiving this reinvite the other end (which in my case was the same instance of asterisk -- the call was handled via an external SIP proxy, but I don't think it matters) tore the call down: [Feb 13 01:02:14] DEBUG[25292] app_fax.c: T38 down, finishing [Feb 13 01:02:14] DEBUG[25292] app_fax.c: Loop finished, res=6 [Feb 13 01:02:14] DEBUG[25292] app_fax.c: Fax phase E handler. result=49 [Feb 13 01:02:14] DEBUG[25292] app_fax.c: FLOW T.30 Changing from state 12 to 32 [Feb 13 01:02:14] DEBUG[25292] app_fax.c: FLOW T.30 Changing from phase T30_PHAS E_C_ECM_RX to T30_PHASE_CALL_FINISHED [Feb 13 01:02:14] DEBUG[25292] app_fax.c: FLOW T.38T Set rx type 8 [Feb 13 01:02:14] DEBUG[25292] app_fax.c: FLOW T.38T Set tx type 8 [Feb 13 01:02:14] DEBUG[25292] app_fax.c: FLOW T.38T FAX exchange complete | ||
Comments: | By: Leif Madsen (lmadsen) 2010-02-17 13:47:35.000-0600 Both sides are Asterisk 1.6.2.2 right? Are you using Fax For Asterisk, or SpanDSP? It may be useful to provide the configuration on both ends, and perhaps a sample of the large fax for reproducing the issue? I think the configuration will be the most important though. Thanks! By: Dmitry Panov (dop251) 2010-02-18 14:24:19.000-0600 Both sides are asterisk 1.6.2.2, moreover, the same instance of asterisk, even though the call was made via an external SIP proxy. The media path was via loopback interface. I don't think it matters though (at least in shouldn't). The configuration is fairly straightforward, I'm attaching sip.conf and extensions.conf Hope this helps. By: Jamuel Starkey (jamuel) 2010-05-01 17:03:23 I see this same issue with a more "traditional" setup: PSTN --> SIP Carrier/Acme Packets SBC --> Asterisk 1.6.1.19-rc3 --> Receive Fax The carrier is requiring sip session-timers (1800 sec) and at the 900-sec refresh interval we see a RE-INVITE from the Acme then Asterisk replies 488 Not Acceptable. Attaching SIP signaling. By: Russell Bryant (russell) 2011-07-27 13:40:35.860-0500 Per the Asterisk maintenance timeline page at http://www.asterisk.org/asterisk-versions maintenance (bug) support for the 1.4 and 1.6.x branches has ended. For continued maintenance support please move to the 1.8 branch which is a long term support (LTS) branch. For more information about branch support, please see https://wiki.asterisk.org/wiki/display/AST/Asterisk+Versions If this is still an issue, please open a new issue so it can be re-triaged appropriately. Thanks! |