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电压测量
如果检测到任何针脚上的电压大于约 2 伏,则无法进行线缆测试和长度测量。 VDV II Pro
转而显示有关存在的电压及这些电压所指示的服务类型的信息(如果适用)
显示屏上显示检测到的电压和存在电压的针脚及极性。 取决于端口和针脚上的电压,显示
屏上也会显示在线缆上检测到的服务类型…
端口
电压
针脚
语音
PBX
>30v.
3-4 2-5
数据
PoE
(参阅随后部分)
PBX
>30v.
4-5
ISDN
>30v.
3/6 4/5
实例 1 语音端口上的 PBX 服务
实例 2 数据端口上的 ISDN 服务
实例 3 数据端口上的未知服务
显示模拟电话服 (PBX)
显示针脚 2 为正 48 伏(相
对于针脚 5
显示综合业务数据网服务
(ISDN)
显示针脚 3 针脚 6 为正 38
正(相对于针脚 4 针脚 5
警告指示
显示针脚 1 为正 23 伏(相
对于针脚 7
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