[Serusers] on hold problem

[Greger V. Teigre]

- Make sure nat=yes is found in the Route set of the reINVITE.
- Look at the mediaproxy messages in /var/log/messages, you should get 
one for the INVITE and then one for the OK, but not '' empty response.
g-)



Shaun Hofer wrote:
> Hi,
>
> I've been having a problem, where audio is lost either in one or both
> directions when conversaion is taken off 'hold'. The parties are both behind
> NAT and depending UA as whether one or both loose audio. From what I can tell
> its to do with my loose route and nathelper, and how my ser.cfg deals with
> the take off hold INVITE from the phones. When the call is taken off hold the
> rtp streams aren't setup properly again (eg not using mediaproxy correctly).
> What is the best way to solve this problem?
>
> I've seen similarly posts to the mailing list about this problem with no
> solution posted.
> http://lists.iptel.org/pipermail/serusers/2006-March/027424.html
> http://lists.iptel.org/pipermail/serusers/2006-April/027885.html
> http://lists.iptel.org/pipermail/serusers/2006-May/028407.html
>
> Thanks
> Shaun
>
>
> I have a similarly config to getting started guides ser.cfg
>
> # -----------------------------------------------------------------
> # Loose Route Section
> # -----------------------------------------------------------------
>
>         if (loose_route()) {
>                 if (!has_totag()) {
>                         sl_send_reply("403", "Forbidden");
>                         break;
>                 };
>                 if (method=="INVITE") {
>                         if ((method=="INVITE" || method=="REFER")
> && !has_totag()) {
>                                 if (!proxy_authorize("","subscriber")) {
>                                         proxy_challenge("","0");
>                                         break;
>                                 } else if (!check_from()) {
>                                         sl_send_reply("403", "Use From=ID");
>                                         break;
>                                 };
>                                 consume_credentials();
>                         };
>                         if
>  (client_nat_test("3")||search("^Route:.*;nat=yes")) {
>                                 setflag(6);
>                                 use_media_proxy();
>                         };
>                 };
>                 route(1);
>                 break;
>         };
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>