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PCM接口定义
PCM设备已被广泛应用于各行各业，对于PCM接口定义，其中PCM设备接口类型有很多，比较常用的有：环路中继接口（FXO接交换机用户线）；用户线接口（FXS直接接电话机）；二线音频接口；四线音频接口；二线EM接口；四线EM接口；异步RS232/V.24接口；同步RS232；RS422接口；RS…
2024-5-26 4:23:54[未知IP0801]网友
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2024-5-2 12:54:32[未知IP0801]网友
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2024-5-2 8:24:37[未知IP0801]网友
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2024-5-2 3:54:45[未知IP0801]网友
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2024-5-1 23:25:01[未知IP0801]网友
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2024-4-27 6:24:02[未知IP0801]网友
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2024-4-27 1:54:28[未知IP0801]网友
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2024-4-26 21:24:50[未知IP0801]网友
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