[Users] 183 early media and NATed clients

[Ovidiu Sas]

Hi Jeff,

You can do an ugly hack.
For those broken clients (and only for those), as soon as you receive
the INVITE send back a 180 Ringing and later on drop the upstream 183.
This will generate local ring to the subscriber until the 200ok is received.

Note: If the called party is busy, the caller will hear ring-back
followed by busy.


Hope this helps,
Ovidiu Sas

On 2/12/07, Jeff Williams <jeffw at globaldial.com> wrote:
> Ovidiu Sas wrote:
> > Hi Jeff,
> >
> >
> > Why don't you try to fix the client?
> Ideally that would be great, but I don't control all of the clients who
> access our service. I was hoping that there would be a way to
> transparently support these clients, but there doesn't appear to be. I'm
> not going to sacrifice real early media for the sake of these clients.
> > If you mess with 180/183 you will have issues with real early media
> > scenarios.  For instance, if a subscriber is making a call into an IVR
> > that is using early media (let's say a 1-800 number for a bank), the
> > subscriber will not be able hear the IVR and therefore the call will
> > always fail.
> I had wondering whether a 180 with stuff up legitimate 183 early media.
> I guess the answer is a resounding yes.
>
> Thanks,
> Jeff
>