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    Key telephone system having wideband capability
    2.
    发明授权
    Key telephone system having wideband capability 失效
    具有宽带能力的关键电话系统

    公开(公告)号：US3684833A

    公开(公告)日：1972-08-15

    申请号：US3684833D

    申请日：1969-11-10

    Applicant: BELL TELEPHONE LABOR INC

    Inventor： BUSH STANLEY E ,  CROUSE PARKER E ,  SALTUS GEORGE E

    IPC: H04Q3/58 ,  H04M3/00 ,  H04N7/14 ,  H04Q3/62 ,  H04M11/08 ,  H04M1/00

    CPC classification number: H04Q3/625

    Abstract: A key telephone system is arranged to provide wideband service to any number of stations served by the system. Wideband switches are associated with each station on a per-line basis and are arranged to function in conjunction with the associated station and with a line circuit common to all the stations to establish wideband connections selectively to any station. The switches on each line are connected such that wideband capability for that line is available only to one station at a time on a priority basis. The system is arranged such that a wideband connection may be made to a line only when at least one station associated with that line is available for such service.

    Abstract translation: 一个关键的电话系统被安排为系统服务的任何数量的电台提供宽带服务。 宽带交换机在每个线路上与每个站相关联，并且被布置为与相关联的站并且与所有站共用的线路电路一起工作，以选择性地建立到任何站的宽带连接。 连接每条线路上的开关，使得该线路的宽带能力在优先的基础上一次只可用于一个电台。 该系统被布置成使得仅当与该线路相关联的至少一个站可用于这种服务时，可以对线路进行宽带连接。

    Dial selective wideband intercommunication system
    4.
    发明授权
    Dial selective wideband intercommunication system 失效
    拨号选择宽带通信系统

    公开(公告)号：US3649761A

    公开(公告)日：1972-03-14

    申请号：US3649761D

    申请日：1970-01-23

    Applicant: BELL TELEPHONE LABOR INC

    Inventor： BUSH STANLEY E ,  OLSON DAVID T ,  SALTUS GEORGE E

    IPC: H04M9/00 ,  H04N7/14 ,  H04N7/15 ,  H04Q3/00 ,  H04M11/00

    CPC classification number: H04N7/141 ,  H04M9/002 ,  H04N7/15 ,  H04Q3/0016

    Abstract: A key telephone system is arranged with a selective intercommunication link to provide wideband service between any two stations served by the system. A station lockout circuit controls access to the link to insure that only two stations, calling station and a called station, may be connected to the link at one time. A selector circuit operates in conjunction with the lockout circuit to match the transmit-receive lead pairs of a called station with the proper lead pairs of the calling station. The system is arranged such that a three-party wideband conference may be established between a line, a first station and a second station connected to the first station via the link. All the parties to the conference are connected together for continuous audio transmission while wideband transmission is maintained only between two of the parties under selective control of the first station.

    Abstract translation: 一个关键的电话系统被配置有选择性的通信链路，以在系统服务的任何两个站之间提供宽带业务。 站锁定电路控制对链路的访问，以确保只有两个站，呼叫站和被叫站可以一次连接到链路。 选择器电路与锁定电路一起工作，以将被叫站的发送接收引线对与呼叫站的正确引线对匹配。 该系统被布置成使得可以经由链路在线，第一站和连接到第一站的第二站之间建立三方宽带会议。 会议的所有各方连接在一起，用于连续音频传输，而宽带传输仅在第一台选择性控制下的两方之间保持。

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