[Serusers] Header and To changing.

[Greg Fausak]

Keith,

If I'm not mistaken, the From and To form part of the request's dialog
'key' along with the callid.  To cannot be changed.  If you did change 
To
in the Level3 direction, when the request comes back you would have to 
replace the
original 'To' from the UAC.  I think this is, in effect, a psuedo b2bua.

I agree with Jiri, the request uri is what is important.  However, you
know what they say about the 1000 pound gorilla :-)

-g


On Sep 24, 2004, at 11:13 AM, TSS Support wrote:

>
> From: "Jiri Kuthan" <jiri at iptel.org>
>> Then the provider is using VERY questionnable policy and ought to 
>> look only
>> at request-uri.
>> * is a B2BUA -- it does not rewrite, it generates everything on its 
>> own.
>> I personally think B2BUA is in most cases very suboptimal technology.
>> Scalability is an example, even if it does not matter in baby-sized 
>> setups.
>> B2BUa security model is questionnable too.
>
>
> See, this is the problem. The provider is Level3. We are trying to use 
> their Enhanced Local service rather than provide all of the toll 
> calling over our trunks. They insist that there must be e.164 
> formatted addresses in all header fields: From, To, and Request-URI. 
> The first and last are easy. It seems the only solution to fix the 
> middle one is to add a B2BUA or go in and patch SER. We don't want to 
> add another point of failure, so it's likely we'll end up adding 
> t_relay_to_level3() or something like that.
>
> -Keith, TSS
> _______________________________________________
> Serusers mailing list
> serusers at lists.iptel.org
> http://lists.iptel.org/mailman/listinfo/serusers
>
>
Greg Fausak
www.AddaBrand.com
(US) 469-546-1265