1.6 Applicability Statement
This protocol is applicable when both the SIP protocol clients and the server support SIP and intend to use one or more of the enhancements offered by this protocol.
This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
This protocol is applicable when both the SIP protocol clients and the server support SIP and intend to use one or more of the enhancements offered by this protocol.