Summary:	ASTERISK-25858: [patch]Early media not processed when received ACM with some conditions
Reporter:	Igor Nikolaev (microlana)	Labels:	patch
Date Opened:	2016-03-21 07:44:44	Date Closed:
Priority:	Major	Regression?	No
Status:	Open/New	Components:	Channels/chan_dahdi/SS7
Versions:	13.0.0 13.0.1 13.0.2 13.1.0 13.1.1 13.2.0 13.2.1 13.3.0 13.3.1 13.3.2 13.4.0 13.5.0 13.6.0 13.7.0 13.7.1 13.7.2	Frequency of Occurrence	Constant
Related Issues:
Environment:	libss7-2.0.0 SS7 digital trunk environment	Attachments:	( 0) bad.pcap ( 1) isup.c.patch ( 2) isup.h.patch ( 3) libss7.h.patch ( 4) sig_ss7.c.patch
Description:	If we making outbound call via SS7 and after sending ISUP IAM we got ACM with following conditions: Backward call indicators contain called party's status indicator "no indication" (i.e. == 0); Optional backward call indicators contain in-band information indicator (i.e. == 0x01); we must do a PROGRESS SIP message and start early media channel. Required procedure described at the ETSI ES 283 027 V1.4.0 (2007-09) in section 7.2.3.1.4a Sending of 183 Session Progress for early media scenarios.
Comments:	By: Asterisk Team (asteriskteam) 2016-03-21 07:44:45.193-0500 Thanks for creating a report! The issue has entered the triage process. That means the issue will wait in this status until a Bug Marshal has an opportunity to review the issue. Once the issue has been reviewed you will receive comments regarding the next steps towards resolution. A good first step is for you to review the [Asterisk Issue Guidelines|https://wiki.asterisk.org/wiki/display/AST/Asterisk+Issue+Guidelines] if you haven't already. The guidelines detail what is expected from an Asterisk issue report. Then, if you are submitting a patch, please review the [Patch Contribution Process|https://wiki.asterisk.org/wiki/display/AST/Patch+Contribution+Process]. By: Igor Nikolaev (microlana) 2016-03-21 07:49:20.483-0500 Example trace with ACM message on which we need to start early media, but really we don't do it. By: Igor Nikolaev (microlana) 2016-03-21 08:09:53.930-0500 In this patches we do: - implement processing optional backward call indicators in libss7 module; - implement processing called party's indicator 'no indication' value with set inband ready indication on the optional backward call indicators. By: Rusty Newton (rnewton) 2016-03-22 09:13:13.761-0500 Thanks! The next step will be to get your patches up on Gerrit. Here is a [linked to the Patch Contribution Process|https://wiki.asterisk.org/wiki/display/AST/Patch+Contribution+Process]