2.2.21 Ms-Call-Info Header Field Syntax

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This protocol defines a header field called Ms-Call-Info<15>. The Ms-Call-Info header field is used to communicate a call property to a client endpoint.

The ABNF, as defined in [RFC5234], or the Ms-Call-Info header field is specified as follows:

"Ms-Call-Info" HCOLON "Rgs.Anonymization"

HCOLON is specified in [RFC3261] section 25. If the header field contains a value other than the one specified, the header SHOULD be ignored.

A server endpoint that performs anonymization SHOULD send this header. The anonymization is provided to the recipient of the header. The identity of the originator of the request can still be shown.