DIGITAL PRIVATE BRANCH EXCHANGE, DIGITAL EXCLUSIVE TELEPHONE AND DIGITAL PRIVATE BRANCH EXCHANGE SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a digital private branch exchange that eliminates the need for a wiring work in a new distributing board for building up a LAN for a Home PNA (Home Phone line Networking Alliance).;SOLUTION: A main control board 20 has a system side Home PNA interface section 203, a packet switch section 202, extension telephone containing boards 18, 19, and an exchange control section 201. The extension phone containing boards 18, 19 have a plurality of extension ports 181a to 181h provided with an analog pone interface section 184 and a digital exclusive telephone interface section 185, a plurality of extension side Home PNA interface sections 186, a system side Home PNA interface section 183, a packet switch section 182, and a channel control section 181. A LAN interface board 21 has a system side Home PNA interface section 214, a LAN interface section 212, a packet switch section 213, and a LAN control section 211.;COPYRIGHT: (C)2003,JPO