Hi all,

I am interested in setting up a test call whereby the Userpart of the URI
has a comma (‘,’) included; however looking at the ABNF syntax I cannot
fathom out an example SIP header line that would be syntactically correct.

I have also tried a few clients and they all seem to behaviour differently
(some removed it, others simply kept a comma and did not escape it).



I am looking at a From Header: where Alice,Smith of example.com is sending
a message.



E.g.

From: <sip:Alice\,sm...@example.com:5060>;tag=fmTag-1234567890-0



As you can see I am thinking the comma is to be escaped using the backslash
character but is that correct?



========================

Extract of ABNF site

Userinfo                              Top

userinfo               =              ( user   /   telephone-subscriber )
[ ":" password ]   "@"

                                ; examples:

;    sip:al...@atlanta.com

;    sip:alice:secretw...@atlanta.com;transport=tcp

;    sip:+1-212-555-1212:1...@gateway.com;user=phone



user       =              1*( unreserved   /   escaped   /
user-unreserved )

user-unreserved              =              "&"   /   "="   /   "+"   /
"$"   /   ","   /   ";"   /   "?"   /   "/"



password            =              *( unreserved   /   escaped   /   "&"
/   "="   /   "+"   /   "$"   /   "," )


Thanks for any assistance



Paul
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