[SIPForum-discussion] Request URI in case of tel uri registration

[sunil singh]

You must either use a global phone number, or else you must include a phone-context parameter:

	tel:+1-555-987-1234
or tel:1234;phone-context=abc.com

 

In your case, You are not using a phone number and basicaly tel uri is for phonenumber.

 

- Request-Line: REGISTER tel:ims118.aaa.net SIP/2.0
OR
- Request-Line: REGISTER ims118.aaa.net SIP/2.0
 
so both are incorrect.  now take a case study.
 
Say my ua's IP address is: 172.16.0.200, proxy is at 172.16.0.100, it sends the REGISTER request to registrar with these fields:
  
         From: <sip:user at 172.16.0.200 <mailto:user at 172.16.0.200> >
         To: <sip:user at 172.16.0.100 <mailto:user at 172.16.0.100> >
         Contact: <tel:1234>
No, its not correct:
First, tel:1234 is a syntactically invalid tel uri. You must either use 
a global phone number, or else you must include a phone-context parameter:
 tel:+1-555-987-1234
    or tel:1234;phone-context=abc.com
Lets assume you are using the former.
As noted above, you can't use this as the To address in your register. 
Lets give you sip AOR:
 sip:xyz at abc.com
And lets assume that there is an ENUM translation from
 tel:+1-555-987-1234
    to sip:xyz at abc.com
Then you want your REGISTER to be more like:
 REGISTER sip:abc.com
 To: sip:xyz at abc.com
 From: sip:xyz at abc.com
 Contact: sip:user at 172.16.0.200

If you want to avoid ENUM, then you should probably avoid tel: as well. 
Instead, use sip uris with the user=phone parameter:
 REGISTER: sip:abc.com
 To: <sip:+1-555-987-1234 at abc.com;user=phone>
 From: <sip:+1-555-987-1234 at abc.com;user=phone>
 Contact: sip:user at 172.16.0.200

I think the proxy will resolve the To-uri to a correct sip uri, that the proxy should forward the INVITE to <sip:user at 172.16.0.200 
but it doesn't.The proxy can not resolve the tel:1234 to my phone, the the transaction is terminated due to resolve failure.
  

 I hope this can be useful for you.
 
 
Regards,
Sunil

 


From: guitar.zen2006 at gmail.com
Date: Tue, 6 Jul 2010 07:34:00 -0700
To: ashubdk at gmail.com
CC: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] Request URI in case of tel uri registration

As far as the hosted platform that my company provides which uses Broadsoft doesn't require tel:URI in the Request URI. Also off hand I don't believe RFC 3261 requires that the register Request URI needs to have "tel:URI" in it. This is part of the register request-line from the invite packet from my soft phone to my sip account.



REGISTER sip:commpartners.us SIP/2.0


Perhaps, it depends on the platform you are on. Hope that helps a little.


Barry





On Tue, Jul 6, 2010 at 6:41 AM, Ashutosh Panda <ashubdk at gmail.com> wrote:

Hi All,

This is a question regarding implementation of tel uri in a REGISTER message. 
Whether the uri should contain only the 'URI' in SIP REGISTER or it should contain "tel:URI" as the Request URI.
Please confirm which of these two syntax are correct.

- Request-Line: REGISTER tel:ims118.aaa.net SIP/2.0
OR
- Request-Line: REGISTER ims118.aaa.net SIP/2.0


Thanks
Ashutosh


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