[asterisk-bugs] [Asterisk 0014800]: 183 response although progressinband=never when routed to PRI

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=14800 
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Reported By:                festr
Assigned To:                
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Project:                    Asterisk
Issue ID:                   14800
Category:                   Channels/chan_sip/Interoperability
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           SVN 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases):  1.4  
SVN Revision (number only!): 184842 
Request Review:              
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Date Submitted:             2009-04-01 02:27 CDT
Last Modified:              2009-09-10 14:20 CDT
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Summary:                    183 response although progressinband=never when
routed to PRI
Description: 
hi, I've a similiar problem as bug https://issues.asterisk.org/view.php?id=13034

Incoming call - SIP/SDP Request: INVITE sip:xx at yy, with session
description and asterisk responds with 183 with SDP although there is
progressinabnd=never

This call (INVITE) is routed to Zap/g1 PRI euroISDN

on pri debug:
Message type: CALL PROCEEDING (2)
(after 2 seconds)
Message type: ALERTING (1)

after received ALERTING, asterisk sends 180 RING but asterisk is not
generating alert inside RTP SDP although it sends RTP (with silence) so the
far end is not generating alert although 180 RING was sended by us. Thats
because right after INVITE asterisk sended early 183 with SDP and RFC says
that if we are sending 183 with SDP, far and is not generating RING. 

I'm not sure that i've explain it clear. If any question, logs or so, tell
me.

(I've made small hacks inside channel_sip.c to not send 183 with SDP in
any situation) and it works for me in this installation. But it should be
fixed somehow. 

and the question - asterisk does not can generate its own alert (tones)
when ALERT without PROGRESS INBAND is received on the PRI?

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Relationships       ID      Summary
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related to          0013034 [patch] 183 response although progressi...
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 (0110501) oej (manager) - 2009-09-10 14:20
 https://issues.asterisk.org/view.php?id=14800#c110501 
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Can you still try with the latest version of 1.4 in SVN. I just committed
some fixes related to these issues. Check the prematuremedia option in
sip.conf,sample - where you can turn off the ghost 183's.

THanks for testing this! 

Issue History 
Date Modified    Username       Field                    Change               
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2009-09-10 14:20 oej            Note Added: 0110501                          
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