[SIPForum-discussion] Use of user=param in SIP REQ URI

[Ravi Ranjan Sinha]

Hi,

It is optional parameter only.

Regards,
Ravi
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From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of amin hussain
Sent: Monday, November 24, 2008 12:24 PM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] Use of user=param in SIP REQ URI

Hello All

Is there a standard or ETSI TS which mandates the use of user=param in the REQ URI when sending an INVITE to a IMS. Its my understanding that this is not a mandatory parameter either in RFC 3261 or ETSI TS for IMS and an IMS core should be able to handle all calls (off-net and on-net) without the use of user=param in the REQ URI as most UA (i.e. Xlite) cannot confirm if the Dialed Number is a valid Telephone number (i.e. a PSTN number) since they do not maintain the complete dial plan (prefix plan) for a region.

Regards
Amin Hussain.

________________________________
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