Detection of loop-back conditions on faulty digital trunks
    1.
    发明授权
    Detection of loop-back conditions on faulty digital trunks 失效
    检测故障数字干线上的环回条件

    公开(公告)号:US5951701A

    公开(公告)日:1999-09-14

    申请号:US930107

    申请日:1998-02-20

    摘要: A method of detecting loopbacks on trunks in digital networks, comprises the steps of detecting an out-of-service trunk, continually placing a predetermined bit pattern on an outgoing channel of a trunk card, continually monitoring a receive channel of the trunk card to detect said bit pattern, and identifying the presence of a loopback when said bit pattern is persistently detected on the receive channel. This method avoids the need to dedicate a trunk channel for signaling purposes. By detecting the presence of loopbacks, intelligent networks can be prevented from unjustifiably clearing an alarm condition and returning traffic to a fault path.

    摘要翻译: PCT No.PCT / CA96 / 00289 Sec。 371日期:1998年2月20日 102(e)1998年2月20日PCT PCT 1996年5月8日PCT公布。 WO96 / 36147 PCT出版物 日期:1996年11月14日一种在数字网络中检测中继线环路的方法,包括以下步骤:检测出服务中继,将预定比特模式连续地置于中继卡的输出信道上,连续监控接收信道的接收信道 所述中继卡用于检测所述位模式,并且当在所述接收通道上持续检测到所述位模式时,识别存在环回。 该方法避免了将信道用于信令的专用信道。 通过检测环路的存在,可以防止智能网络不合理地清除报警条件并将流量返回到故障路径。