用电话线进行MODEM通信时,最怕家里有人不小心拿起电话分机来拨号,它会破坏MODEM的正常工作。为防止这种情况的发生,这里设计了一种电路可以在MODEM使用期间完全断开家里的所有分机,使MODEM通信正常进行。当开关置于MODEM位置时,电话机线被切断,因此不怕其它人 MODEM communication with the telephone line, the most afraid of someone in the house accidentally picked up the phone extension to dial, it will destroy the normal work MODEM. To prevent this from happening, a circuit was designed here to completely disconnect all extensions in the home during MODEM operation, allowing MODEM communications to proceed properly. When the switch is placed in the MODEM position, the telephone line is cut off and therefore not afraid of others