[SIPForum-discussion] Contact header field in REGISTER request

[Keyur Amin]

RFC3261 does talk about construction of the contact header in section 25.1.

Contact        =  ("Contact" / "m" ) HCOLON ( STAR / (contact-param *(COMMA contact-param)))
contact-param  =  (name-addr / addr-spec) *(SEMI contact-params)
name-addr      =  [ display-name ] LAQUOT addr-spec RAQUOT
addr-spec      =  SIP-URI / SIPS-URI / absoluteURI
contact-params     =  c-p-q / c-p-expires / contact-extension
contact-extension  =  generic-param


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Thanks,
Keyur Amin

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On Sunday, January 5, 2014 12:40 PM, AOEKING <aoeking at gmail.com> wrote:
 
According to http://www.in2eps.com/y30/tk-ietf-rfc-3261.html#e-19-1-1 userpart is optional.

Nuwan

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