Hello,

the way tm module is constructed does not allow to add a new branch from config before all branches of the previous forwarding step are not completed. I do not know what would RFC say in this case, because you have a parallel forking from which proxy has to choose a wining reply.

With some coding in C, that should be made possible, though.

Cheers, Daniel

On 2/8/13 11:16 AM, Mark Boyce wrote:

Hi All

Got a problem handling redirects when more than one phone is ringing. The setup is this;

Phone1 - Extension 100 Phone 2 - Extension 101 Phone 3 - Extension 102 & 101

When Phone 1 rings Extension 101 Phones 2 & 3 ring correctly as you would expect.

If Phone 2 now sets the on phone forward/redirect we see the following;

Phone 1 - Invite sent to 101 Phone 2 & 3 Receive Invites Phone 2 responds with a 302 Redirect Phone 3 Rings.

Which again is as you would expect.

The problem is that the 302 Message we're getting back is being seen in onreply_route where I cannot add a new branch to handle it. (Error - misused command append_branch / Command cannot be used in the block)

If Phone 3 is unavailable / times out / busy / or otherwise does not take the call we then see the 302 from Phone 2 arrive in failure_route where it is handled as expected.

The call flow we're trying to achieve is that the redirect is followed whilst the other available phone carries on ringing.

I've tried with failure_reply_mode as the default 0 and as 3, both do the same thing.

Currently working with kamailio version 3.4.0-dev6

Can anyone spot what I'm doing wrong ?

Thanks

Mark _______________________________________________ SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users