Rules for authorization of SIP requests A container for a set of rules Contains a set of match specifiers for the host part of a SIP address and then other rules to be applied to any address that matches at least one of the specified hostPattern elements. A (perl-compatible) regular expression used to match the host part of a SIP URL. The pattern is implicitly anchored at both ends. Contains a set of userPattern specifiers for the user part of a SIP address and then other rules (permissionMatch) to be applied to any address that matches at least one of the specified user patterns. A pattern expression used to match the user part of a SIP URL. The pattern is implicitly anchored at both ends. Contains a set of permission specifiers; the caller must have at least one of the named permssions in order to use the SIP address in the request. A permission name required to use this SIP address. Used to describe the rule in the user interface.