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1.发明授权Arrangements for producing and recognizing information identifying non-occupied transmission paths in a digital transmission system 失效用于生成和识别识别数字传输系统中非占用传输路径的信息的安排
公开(公告)号：US4947391A
公开(公告)日：1990-08-07
申请号：US406983
申请日：1989-09-13
摘要： Arrangement for producing and recognizing information identifying non-occupied transmission paths in a digital transmission system.It is known in the art to characterize, by means of special bits in the time-division multiplex signal frame, transmission paths in a PCM transmission system which do not convey a useful signal, or to refrain from transmitting a signal through a non-occupied transmission path. To prevent the necessity of resolving the frame structure down to the bit plane for enabling recognition of the identification of non-occupied and undisturbed transmission paths, a digital signal pattern is used which is periodical, is distributed over the time-division multiplex frames and cannot be simulated by frame alignment of system alarm words nor by the useful information. If more specifically the inverted version of the standardized alarm-indication-signal AIS is used as the digital signal pattern, then the additional circuit cost and design effort in realizing arrangement for producing and recognizing this pattern is very low because of the fact that AIS-generators and AIS-recognition circuits already present in existing equipment can be utilized very efficiently in such a realization.
摘要翻译： 用于产生和识别识别数字传输系统中的非占用传输路径的信息的装置。 在本领域中已知的是，通过时分多路复用信号帧中的特殊位来表征PCM传输系统中不传送有用信号的传输路径，或者不通过未占用的信号发送信号 传输路径。 为了防止将帧结构解析到位平面以便能够识别非占用和未受干扰的传输路径的必要性，使用周期性的数字信号模式，分布在时分复用帧上，并且不能 通过系统报警字的帧对齐或有用信息进行模拟。 如果更具体地将标准化报警指示信号AIS的反转版本用作数字信号模式，则由于以下事实，附加电路成本和实现用于生成和识别该模式的布置的设计努力非常低， 已经存在于现有设备中的发电机和AIS识别电路在这种实现中可以被非常有效地利用。
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2.发明授权Arrangements for producing and recognizing information identifying non-occupied transmission paths in a digital transmission system 失效用于生成和识别识别数字传输系统中非占用传输路径的信息的安排
公开(公告)号：US4961180A
公开(公告)日：1990-10-02
申请号：US275643
申请日：1988-11-22
摘要： It is known in the art to characterize, by means of special bits in the time-division multiplex signal frame, transmission paths in a PCM transmission system which do not convey a useful signal, or to refrain from transmitting a signal through a non-occupied transmission path. To prevent the necessity of resolving the frame structure down to the bit plane for enabling recognition of the identification of non-occupied and undisturbed transmission paths, a digital signal pattern is used which is periodical, is distributed over the time-division multiplex frames and cannot be simulated by frame alignment of system alarm words nor by the useful information. If more specifically the inverted version of the standardized alarm-indication-signal AIS is used as the digital signal pattern, then the additional circuit cost and design effort in realizing arrangements for producing and recognizing this pattern is very low because of the fact that AIS-generators and AIS-recognition circuits already present in existing equipment can be utilized very efficiently in such a realization.
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