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    • 97. 发明公开
    • Parallel operation of telephone equipment on a digital loop
    • 平行电话电话电话
    • EP0059543A1
    • 1982-09-08
    • EP82300675.4
    • 1982-02-11
    • NORTHERN TELECOM LIMITED
    • Retallack, Laurence JamesReedyk, Cornelis Wilfred
    • H04Q11/04H04Q5/00H04M1/72
    • H04Q5/02H04M9/022H04M9/025
    • Disclosed is a digital station apparatus, such as a digital telephone set, capable of being operated in parallel on a subscriber's digital loop (e.g. in an extension mode) without the need to route all the PCM signals to commom equipment. Only one of the parallel sets is active at a time; all the others are passive. In the passive state the telephone set receives only, and does not transmit. It monitors its own signal magnitude relative to the signal magnitude produced by the active "extension" on the same digital loop. When its own signal magnitude has satisfied a comparison criterion, then that passive set becomes active and both transmits and receives, while all other sets on the loop are passive.
    • 公开了一种能够在用户的数字环路(例如在扩展模式中)并行操作的数字电台设备,例如数字电话机,而不需要将所有PCM信号路由到普通设备。 一次只有一个并行集合是活动的; 所有其他的都是被动的。 在被动状态下,电话机只接收,不发送。 它相对于由相同数字环路上的有效“扩展”产生的信号幅度监视其自身的信号幅度。 当其自身的信号幅度满足比较标准时,该被动集合变为有效并且发送和接收,而环路上的所有其他集合都是被动的。