Hi, 

>>Again, that is what I have proposed as an alternative. I have said 
>>that the UA should be allowed, when it sees the "ob" 
>>parameter in the Path, to use keep-alive even if the registrar does
not 
>>support outbound.
> 
>What's there to stop it from doing just that?

Nothing, as far as I know.

I am only asking for some clarification text.

The draft currently says:

"The UAC examines successful registration responses for the presence
of an 'outbound' option-tag in a Require header field value.
Presence of this option-tag indicates that the registrar is compliant
with this specification, and that any edge proxies which needed to
participate are also compliant."

So, I think it would be good to add something like:

"If the registrar did not support outbound, but there was a path header
with the edge proxy URI
present in the 200 OK response to the REGISTER message, the UAC may
check 
whether the URI-parametyer "ob" is included in the URI. If so, then the
UAC knows that
outbound keepalives can be used even though the registrar does not
support outbound."

So, it's just a clarification...

Regards,

Christer
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