I have gone over the release notes for 2.4.2 to 2.4.6. I will upgrade and 
retest.

Louis

From: Users <users-boun...@lists.opensips.org> On Behalf Of Ben Newlin
Sent: July 31, 2019 10:34 AM
To: OpenSIPS users mailling list <users@lists.opensips.org>
Subject: Re: [OpenSIPS-Users] Functional Difference B2B_Bridge between OpenSIP 
1.8 and 2.4.2


WARNING: External Email: Exercise Caution

I’m not sure about the B2B behavior, but is there a reason you are not 
migrating to 2.4.6, which is the latest supported 2.4 release? It’s possible 
this problem has already been reported and fixed.

Ben Newlin

From: Users 
<users-boun...@lists.opensips.org<mailto:users-boun...@lists.opensips.org>> on 
behalf of Louis Rochon 
<louis.roc...@comtechtel.com<mailto:louis.roc...@comtechtel.com>>
Reply-To: OpenSIPS users mailling list 
<users@lists.opensips.org<mailto:users@lists.opensips.org>>
Date: Wednesday, July 31, 2019 at 10:29 AM
To: "users@lists.opensips.org<mailto:users@lists.opensips.org>" 
<users@lists.opensips.org<mailto:users@lists.opensips.org>>
Subject: [OpenSIPS-Users] Functional Difference B2B_Bridge between OpenSIP 1.8 
and 2.4.2


Trying to upgrade my platform to OpenSIPS 2.4.2 (yea, about time, I know).



We use this to move established calls from one server to another:



/usr/local/sbin/opensipsctl fifo b2b_bridge <tupleID> sip:555@1.2.3.4 0



This works fine with OpenSIPS 1.8. The above causes this:

1. Invite (reinvite) to caller with no sdp.

2. RX of 200 OK with SDP from caller

3. Invite with SDP to 1.2.3.4

4. RX of 200 OK with SDP from 1.2.3.4

5. OpenSIPS send ACK WITH SDP to caller.



Call moved. All good.



With OpenSIPS 2.4.2:

1. Invite (reinvite) to caller with no sdp.

2. RX of 200 OK with SDP from caller

3. Invite with SDP to 1.2.3.4

4. RX of 200 OK with SDP from 1.2.3.4

5. OpenSIPS send ACK WITHOUT SDP to caller.



With 2.4.2, I get one way audio, very likely because of the lack of SDP in the 
ACK in point 5.



My research does not lead me anywhere on how why this behaviour changed between 
1.8 and 2.4.2. I can't find any flags to set to get b2b_bridge command to have 
to old behaviour.



Help!



regards,

Louis
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