Xcap 1.2.1 -

: Works with conditional queries (ETags) to ensure that updates don't overwrite other changes. Typical Environment Setup

: It provides an interface for managing user data such as presence authorization rules, resource lists (contact lists), and service configurations. XCap 1.2.1

: Like Kamailio or OpenSIPS , which utilizes the library to authorize SIP requests based on the XML rules. XCAP Module - openSIPS : Works with conditional queries (ETags) to ensure