[SIPForum-techwg] Comment on example in 10.2.1

[Francois Audet]

I agree, IF the service provider imposes the same prefixes to all it's
customers (which may not be the case).

That being said, I still believe that the use of dialsting instead
on user=phone is problematic and will create issues. I'd rather
we use user=phone, and have the PBX remove the prefixes, and use
fully-qualified phone numbers. 

In other words, something like this:
sip:+66612128901234;user=phone
 

> -----Original Message-----
> From: techwg-bounces at sipforum.org 
> [mailto:techwg-bounces at sipforum.org] On Behalf Of Elwell, John
> Sent: Thursday, April 09, 2009 06:23
> To: techwg at sipforum.org
> Subject: [SIPForum-techwg] Comment on example in 10.2.1
> 
> In 10.2.1 there is an example of a dialstring sent to the 
> SP-SSE in the Request-URI of an INVITE request:
> "SIP:101066612128901234;phone-context=[Enterprise Domain 
> Name]@ [Service Provider Domain Name];user=dialstring"
> 
> (Ignoring the incorrect capitalization of sip:), this uses 
> Enterprise Domain Name in phone-context, implying it is the 
> domain name of the enterprise. If it is a dial string 
> relating to the enterprise domain, the enterprise should be 
> able to resolve it and convert to a
> (non-dialstring) URI.
> 
> In my opinion, if the SIP-PBX is going to send dial strings 
> to the SP-SSE, it should only send dial strings in the 
> context of the SP's domain. I would propose changing it to:
> "SIP:101066612128901234;phone-context=[Service Provider 
> Domain Name]@ [Service Provider Domain Name];user=dialstring"
> 
> John
> 
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