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The Digital Line Detection program monitors the modem to make sure that the phone line is a standard analog phone line. Plugging into a digital phone line could cause damage to the modem.
The purpose of this application is to provide a warning before damage occurs.
簡單的說，就是保護你的Thinkpad的Modem，在被插入數位電話線時會提出警告以避免Modem損毀(可能數位電話線的電壓脈衝較高容易造成Modem損傷，詳細我也不清楚是否真的如此)
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數位電話指的應該像是ISDN這類的線路，因為他的電壓較高，誤接確實會導致設備燒毀。
敝人的USB轉RS232轉接線就因為誤接ISDN孔已經燒掉兩條.....
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