This Recommendation 1 describes a lightweight directory access protocol (LDAP) schema to represent ITU-T H.323 endpoints. It is an auxiliary class related to [ITU-T H.350] and derives much of its functionality from that architecture. Implementers should review [ITU-T H.350] in detail before proceeding with this Recommendation. Its attributes include all ITU-T H.323 alias types. These aliases can be downloaded to an endpoint for automatic configuration, accessed by a gatekeeper for call signalling and authorization, and published to white pages to create user dialing directories.