Internet protocol for IP private branch exchanges

摘要

An Internet protocol query for Internet protocol private branch exchanges including a private branch exchange that is connected to the public switched telephone network for receiving a call setup request, the private branch exchange not being enabled for receiving calling name delivery information from a telecommunications circuit; at least one of an incumbent local exchange carrier switch and a competitive local exchange carrier switch in communication with the private branch exchange, the at least one of the incumbent local exchange carrier switch and the competitive local exchange carrier switch having the telecommunications circuit not enabled for calling name delivery information retrieval; a network in communication with the private branch exchange; and a calling name delivery database in communication with the network for receiving calling name delivery queries from the private branch exchange based on the call setup request. Methods for routing calls based on ENUM information is also included.

主权项

1. An Internet protocol query system for Internet protocol private branch exchanges, the system comprising:
a private branch exchange that is connected to the public switched telephone network that receives a call setup request, the private branch exchange comprising an internal name delivery database, the private branch exchange and the internal name delivery database being independent from and in communication with a carrier switch, the private branch exchange not being enabled to receive calling name delivery information from the carrier switch; and an external calling name delivery database, independent of the carrier switch and the private branch exchange, that receives calling name delivery queries from the private branch exchange based on the call setup request; wherein the private branch exchange is configured, in response to a determination that an incoming telephone number associated with the call setup request does not require calling name delivery information, to withhold sending calling name delivery queries to both the internal name delivery database and the external name delivery database.