Method of distributing tone and alerting signals in a TDM communication system
    1.
    发明授权
    Method of distributing tone and alerting signals in a TDM communication system 失效
    在TDM通信系统中分配音调和告警信号的方法

    公开(公告)号:US3899642A

    公开(公告)日:1975-08-12

    申请号:US34593873

    申请日:1973-03-29

    Applicant: IBM

    CPC classification number: H04Q11/04 H04J3/12

    Abstract: Status and alerting signals are distributed in a TDM communication system in a split-up form in broadcasting mode: the cadencing information of all status/alerting signals is distributed in word format on an existing signaling channel, each bit of such a word representing the scan value of a different status/alerting signal at a given moment. The basic tone common to all status/alerting signals may be distributed in coded form on a special or a common channel like voice signals. Any terminal instructed to do so will regenerate any required tone signal for itself.

    Abstract translation: 状态和告警信号在广播模式下以分割形式分布在TDM通信系统中:所有状态/告警信号的节奏信息以现有信令信道的字格式分布,这样一个字的每一位表示扫描 在给定时刻不同状态/告警信号的值。 所有状态/告警信号共同的基本音调可以以特定或公共信道(如语音信号)的编码形式分布。 任何指定的终端将自动重新生成任何所需的音调信号。

    2.
    发明专利
    未知

    公开(公告)号:DE2229912A1

    公开(公告)日:1973-03-01

    申请号:DE2229912

    申请日:1972-06-20

    Applicant: IBM

    Abstract: A closed loop communication system in which the terminals are grouped into priority classes. Any terminal can seize a free channel if certain priority conditions exist. A channel (frame) is always preceded by a header comprising a priority request field and a priority grant field. The request field has n bits assigned to the n priority classes; a terminal requiring service sets that bit to "1" which corresponds to its class. Thus, the controller receives a compiled overall request and inserts, for the next cycle, into the grant field an indication as to which priority class or classes are now allowed access to the channel. This is accomplished by shifting the contents of the request field to the grant field. A terminal can only seize the channel if its priority class is allowed for that cycle by the grant field, and if the channel is still free.

    4.
    发明专利
    未知

    公开(公告)号:DE2314272A1

    公开(公告)日:1973-10-11

    申请号:DE2314272

    申请日:1973-03-22

    Applicant: IBM

    Abstract: Status and alerting signals are distributed in a TDM communication system in a split-up form in broadcasting mode: the cadencing information of all status/alerting signals is distributed in word format on an existing signaling channel, each bit of such a word representing the scan value of a different status/alerting signal at a given moment. The basic tone common to all status/alerting signals may be distributed in coded form on a special or a common channel like voice signals. Any terminal instructed to do so will regenerate any required tone signal for itself.

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