Patent ID: 8036369
Filing Date: 2011-10-11
Classification: H04M,H04Q

Abstract:
1. A method for realizing direct dialing to an extension across Private Branch Exchanges (PBXs), comprising the following steps: seizing, by a calling terminal of a PBX, a PBX circuit, and initiating a call to a called extension terminal in a PBX cluster by dialing the number of the called extension terminal directly; resolving by a exchange system the number of the PBX switchboard to which the calling terminal belongs according to the number of the calling terminal, and obtaining the number of the PBX switchboard to which the called extension terminal belongs according to information of the number of the called extension terminal; initiating by the exchange system a call to the PBX switchboard to which the called extension terminal belongs, and, when receiving an answer to the call from the PBX switchboard, sending the called extension terminal number, to connect the calling terminal with the called extension terminal.