Off-line data transmission is simply the use of a telephone or similar link to transmit data without involving a computer system.
脱机数据传输是简单地利用电话或类似的链路来传输数据，不包括计算机系统。
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Employers fret that skivers can easily get time off work by faking symptoms to a computer screen, or to a hastily trained voice on the other end of a phone line.
The solution is to check the computer and test machine communication line is off; check the online selection of sensor is correct; check the last test or operation keys.