Circuit arrangement for PCM telecommunication facilities
    1.
    发明授权
    Circuit arrangement for PCM telecommunication facilities 失效
    PCM电讯设施的电路安排

    公开(公告)号:US4786899A

    公开(公告)日:1988-11-22

    申请号:US16159

    申请日:1987-02-18

    摘要: In a circuit arrangement for PCM telecommunication facilities, especially PCM long distance exchange facilities with several synchronous pulse clock controlled transmitters for common transmitting chanel, information from different transmission processes flows over a transmitting channel common to all transmitters. In addition to the transmitting channel, a test channel is provided. For the prevention of simultaneous transmission and a co-mingling together of information, each transmitter transmits its own binary coded address to the transmitting channel always before a message as well as to the test channel and receives back the total information after combining on the test channel for comparison, bit-by-bit with the actual address information transmitted by it. In the event of accidental simultaneous transmission start by a transmitter, in case of character inequality on the test channel between two simultaneously transmitted bits, the binary character of the one type always asserts itself against the binary character of the other type. A transmitter interrupts its transmission in the event of character inequality. The assertion principle is limited to test channels while the transmission of both types of binary characters to the transmitting channel is relatively low ohmicly.

    摘要翻译: 在用于PCM电信设备的电路装置中,特别是具有用于公共发送通道的多个同步脉冲时钟控制发射机的PCM长距离交换设施,来自不同传输过程的信息在所有发射机共同的发射信道上流动。 除了发送信道之外,还提供了测试信道。 为了防止同时传输和信息的共同混合,每个发射机始终在消息之前向发送信道发送自己的二进制编码地址以及测试信道,并且在测试信道上组合之后接收返回的总信息 用于比较它与其发送的实际地址信息的比特。 在发射机发生意外的同时发送的情况下,在两个同时发送的比特之间的测试信道上的字符不等式的情况下,一种类型的二进制字符总是针对另一种类型的二进制字符。 发射机在字符不平等的情况下中断其传输。 断言原理仅限于测试通道,而两种类型的二进制字符向传输通道的传输相对较低。

    Circuit arrangement for telecommunication exchange systems, particularly
telephone exchange systems with switch facilities for emitting signals

    公开(公告)号:US4605824A

    公开(公告)日:1986-08-12

    申请号:US480321

    申请日:1983-03-30

    IPC分类号: H04M19/02 H04Q3/545 H04M3/02

    CPC分类号: H04Q3/545 H04M19/02

    摘要: A telecommunication exchange system has a plurality of switch facilities over which signals are emitted on an average only during a part of their respective occupation. A signal current source for emission of the signals is provided having a call-handling capability limited by signal current load. A signalling system is provided for serving a distribution of the load and provides pulse sequences having respectively identical pulse spacings. Pulses of different pulse sequences simultaneously transmitted over different switch facilities have chronologically different phase relations and a chronological offset from switch facility to switch facility. The offset is such that the pulses of the different pulse sequences connect chronologically to one another with respect to pulse termination and pulse beginning. The switch facilities are allocated for receiving the pulse sequences from the signalling system to a respective one of the pulse sequences of a specific phase relation. The allocation is executable upon consideration of allocations already existing and affecting signalling events. No more than a given number of switch facilities is allocated with respect to the pulse sequences having a respective specific phase relationship. This given number is determined by the signalling current loadability of the current source. With a given allocation of this given number of switch facilities to each of the plurality of phase relations, one or more additional switch facilities request an allocation to a phase relation for signalling, they either receive a signal to abort a setup of the calls or are only allocated a respective phase relation after a given limited delay time if the switch facilities allocated to the phase relation have become fewer than said given number, or if all allocations remain filled at the end of the given delay time, receive the signal to abort setup of the call.

    Switching arrangement for monitoring polarity reversal on lines in
telecommunication systems
    3.
    发明授权
    Switching arrangement for monitoring polarity reversal on lines in telecommunication systems 失效
    用于监测电信系统中线路极性反转的开关装置

    公开(公告)号:US4092489A

    公开(公告)日:1978-05-30

    申请号:US782772

    申请日:1977-03-30

    申请人: Josef Birlmeier

    发明人: Josef Birlmeier

    CPC分类号: H04Q3/00

    摘要: Apparatus is described for monitoring the state, e.g., with regard to polarity, of signal lines in a telecommunication system. An input circuit, by means of high resistances relative to the line resistance, connects the lines to a differential amplifier having a predetermined threshold of response. A component of the amplifier output is applied to the input so as to have a polarity opposite to that of a bias voltage coupled to the amplifier. A capacitive protective circuit connected between the signal lines provides a time delay thereby protecting against interference pulses.

    摘要翻译: 描述了用于监测电信系统中的信号线的状态,例如关于极性的装置。 输入电路通过相对于线路电阻的高电阻将线路连接到具有预定的响应阈值的差分放大器。 放大器输出的分量被施加到输入端,以便具有与耦合到放大器的偏置电压的极性相反的极性。 连接在信号线之间的电容性保护电路提供时间延迟,从而防止干扰脉冲。