Method and apparatus for providing a private communication system in a public switched telephone network
    32.
    发明申请
    Method and apparatus for providing a private communication system in a public switched telephone network 审中-公开
    用于在公共交换电话网络中提供专用通信系统的方法和装置

    公开(公告)号:WO9728658A3

    公开(公告)日:1997-09-18

    申请号:PCT/US9701521

    申请日:1997-01-29

    Applicant: QUALCOMM INC

    CPC classification number: H04W84/16

    Abstract: A private communication network through which a plurality of member users communicate using the public switched telephone network (PSTN) (10) is disclosed herein. Each member user utilizes either a modified land line telephone (48) directly connected to PSTN (10), or uses a modified mobile telephone (22) operatively coupled to the PSTN through a wireless communication system (14). The private communication network includes network call manager (40) having a telephone network interface (92) for establishing a telephone connection with each of a plurality of telephone lines (44) of the PSTN (20). Each of the plurality of telephone lines (44) is associated with one of the plurality of member users. The network call manager (40) further includes a switch matrix (110), coupled to the telephone network interface, for providing an information signal received from an active member user over a selected telephone line to the remaining non-active member users.

    Abstract translation: 本文公开了使用公共交换电话网(PSTN)使多个成员用户进行通信的专用通信网络。 每个成员用户利用直接连接到PSTN的修改的陆线电话,或者使用通过无线通信系统可操作地耦合到PSTN的经修改的移动电话。 专用通信网络包括具有电话网络接口的网络呼叫管理器,用于与PSTN的多个电话线路中的每一个建立电话连接。 多个电话线中的每一个与多个成员用户中的一个相关联。 网络呼叫管理器还包括耦合到电话网络接口的交换矩阵,用于通过所选择的电话线路将活跃成员用户接收的信息信号提供给剩余的非活动成员用户。 网络呼叫管理器控制器通过多条电话线路从成员用户的电话机接收到的即按即说(PTT)请求信号的基础来识别活动成员用户。 每个成员用户的电话机通常能够通过专用通信网络进行标准电话操作以及PTT操作。 PTT专用网络的安全性可以通过配置每个电话机来加强所有这样的反向链路传输的加密,以及来自活动成员用户的前向链路信息的相应解密来增强。

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