This content is no longer actively maintained.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 Microsoft SIP Processing Language (MSPL) is a scripting language used specifically for filtering and routing SIP messages. Known as "message filters", such scripts are embedded in the application manifests of Office Communications Server applications.
MSPL does not support arithmetic, type declarations, or loops outside of the foreach statement.
Describes the basic syntax of MSPL.
Describes the built-in constants of MSPL.
Describes the built-in variables of MSPL, including the predefined request and response variables.
Describes the basic datatypes supported by MSPL and the results of implicit conversion between them.
Describes the predefined types for MSPL.
Provides a comprehensive reference for all built-in MSPL functions.
Provides a guide to writing a simple message filter for use in an Office Communications Server application manifest.