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MSPL Built-in Classes

This content is no longer actively maintained. It is provided as is, for anyone who may still be using these technologies, with no warranties or claims of accuracy with regard to the most recent product version or service release.

The object model space roughly parallels the object model in the Microsoft SIP Class Library as described under the Microsoft.Rtc.Sip reference topic.

Built-in object


Message (MSPL)

Defines a basic SIP message type, and contains the parsed To and From headers along with the content block and the associated transaction. This object serves as the base parent object for the Request and Response objects.


Defines a SIP endpoint stored in the registrar database of the Office Communications Server.


Inherits from Message.

Defines a SIP request, and includes the method type as well as the request URI.


Inherits from Message.

Defines a SIP response message, and includes the status code, status class, and reason phrase.


Defines the target user information.


Defines basic information about a SIP transaction.