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| TB/T 1723-1994 Railway Telephone Switching Network - Ringing Current and Signal Tone (English Version) |
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Detail of TB/T 1723-1994
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Introduction of TB/T 1723-1994
本标准规定了铁路电话交换网交换设备的玲流和信号音的种类及技术指标。
本标准适用于铁道数字程控电话交换设备，也适用于铁路纵横电话交换设备等。
Contents of TB/T 1723-1994