Just commenting on one thing:
[EMAIL PROTECTED] wrote:
> Hello Paul,
>
> Please see inline:
>
>
> -----Original Message-----
> From: ext Paul Kyzivat [mailto:[EMAIL PROTECTED]
> Sent: 04 September, 2008 17:15
> I don't think it is at all good to start interpreting various
> *sequences* of responses as having specific meanings. (180 and 182 have
> their own meanings alone, 182/180 means something else, 180/182 means
> something different. How about 180/182/180? 180/180?) Among other
> things, these responses are often sent unreliably, so they may not all
> be received.
>
> [Jari] 182 alone should be sufficient to signal the CW condition. But,
> the PSTN GW still needs to wait for 180, due the fact how CW service was
> designed in PSTN.
I don't understand what you are saying.
If the GW is *originating* the call, then it will get whatever it gets.
There is no guarantee it will *ever* get a 180. It may get a 183 and
then a 200, or a 182 and 200, or ...
Are you saying that the pstn phone, calling through a gw to a sip phone
will only get the CW ringback if the sip phone sends both 182 and then
180? If so, then I think that solution is broken.
Thanks,
Paul
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