[SIPForum-discussion] contact field in register

[Ian Carpenter]

Hi Raghul,

 

In the case of having multiple Contacts, the “q” value denotes the priority of each particular Contact.  

See RFC3261 section 10.2.1.2: Preferences among Contact Addresses

 

   If more than one Contact is sent in a REGISTER request, the

   registering UA intends to associate all of the URIs in these Contact

   header field values with the address-of-record present in the To

   field.  This list can be prioritized with the "q" parameter in the

   Contact header field.  The "q" parameter indicates a relative

   preference for the particular Contact header field value compared to

   other bindings for this address-of-record.  Section 16.6 describes

   how a proxy server uses this preference indication.

 

 

Ian

----------------------------------------------------------------------
Ian Carpenter / Valid8.com, Inc. - Conform, Perform & Excel(tm)
500 W Cummings Park, Suite #2700, Woburn, MA 01801, USA
i.carpenter at valid8.com / Tel:+1-781-938-0025 / Mob:+1-415-572-7919
http://www.valid8.com <http://www.valid8.com/> 

 

From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of Raghul Prasanna
Sent: Saturday, June 21, 2008 5:40 AM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] contact field in register

 


Hi All,

 

  In register message I have seen contact fields having parameters like

 

contact:sip:aaa at jkhjhj.com

action=proxy;q=0.9

 

contact:mailto:aaa at jkhjhj.com

q=0.1

 

   what do these parameters mean? Can anyone explain?

 

Thanks,

Raghul

 

  _____  

Sent from Yahoo! Mail <http://us.rd.yahoo.com/mailuk/taglines/isp/control/*http:/us.rd.yahoo.com/evt=52418/*http:/uk.docs.yahoo.com/nowyoucan.html> . 
A Smarter Email.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20080622/25ea062e/attachment-0002.html>