SYSTEM FOR AND METHOD OF EXTENDING A PBX PHONE PORT TO A REMOTE PHONE DEVICE

摘要

A system (100) for establishing a voice and signaling link through a PBX system (102) from a remote telephone device (106) includes a PBX system (102), a setless gateway (104), and an remote telephone device (106). The PBX system (102) is coupled to a public switched telephone network (PSTN) (110) via a trunk connection (112). The PBX system (102) is also coupled to the setless gateway (104) via a digital phone port, which includes a first bearer channel B1 (114) and a second bearer channel B2 (116). DTMF tone sequences from the remote telephone device (106) are decoded by the setless gateway (104), which acts as a proxy to the PBX system (102). The setless gateway (104) routes voice and signaling from the second bearer channel B2 (116) to the first bearer channel B1 (114), so as to exend the remote telephone device (106) from the PBX system (102).