Recommendation ITU-T H.350 describes a directory services architecture for multimedia conferencing using lightweight directory access protocol (LDAP). Standardized directory services can support the association of persons with endpoints, searchable white pages, and clickable dialling. Directory services can also assist in the configuration of endpoints, and user authentication based on authoritative data sources. This Recommendation describes a standardized LDAP schema to represent endpoints on the network and associate those endpoints with users. It discusses design and implementation considerations for the interrelation of video and voice-specific directories, enterprise directories, call servers and endpoints.

This revised version of Recommendation ITU-T H.350 introduces several enhancements and clarifications to the previous version, primarily the addition of ITU-T X.500 directories support and authentication across multiple directories, and clarifications of commPrivate and commOwner.

This Recommendation includes an electronic attachment containing two schema configuration files for commURIObject and CommObject.