Private branch exchange (PBX) system, private branch exchange, and method of communication using the same PBX system

• 1. 连接综合业务数字网专用自动小交换机和市话交换机的方法和装置 [P] . 中国专利： CN1157900C . 2004.07.14
• 2. 连接综合业务数字网专用自动小交换机和市话交换机的方法 [P] . 中国专利： CN1339901A . 2002-03-13
• 3. Private branch exchange (PBX) system, private branch exchange, and method of communication using the same PBX system [P] . 美国专利： US2002064275A1 . 2002-05-30

  机译： 专用小交换机（PBX）系统，专用小交换机以及使用同一PBX系统的通信方法

• 4. Private branch exchange systems, private branch exchange, communication equipment, private branch exchange method, and private branch exchange program [P] . 日本专利： JP5483494B2 . 2014-05-07

  机译： 私人小交换机系统，私人小交换机，通信设备，私人小交换机方法和私人小交换机程序

• 5. PRIVATE BRANCH EXCHANGE SYSTEM, PRIVATE BRANCH EXCHANGE, COMMUNICATION DEVICE, PRIVATE BRANCH EXCHANGE METHOD, AND PRIVATE BRANCH EXCHANGE PROGRAM [P] . 日本专利： JP2014011524A . 2014-01-20

  机译： 私有分支交换系统，私有分支交换，通信设备，私有分支交换方法和私有分支交换程序

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• 2. Constructing a Management System for Private Colleges and Universities in China Based on a Comparative Study of Private Colleges and Universities at Home and Abroad [J] . Chunguang Ding . 当代教育研究(百图) . 2021,第011期
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• 4. 基于FPGA的专用交换机系统 [A] . 刘家男 . 2020