system communication modem

A device which connects the communications multiplexor from the remote outlet to the interface device in the computer center.On the transmission end, the modulator converts the signals or pulses to the right codes and readies them for transmission over a communication line in alternating current. On the receiving end a demodulator reconverts the signals to direct current for communication to the computer via the computer interface device.; 把通信多路復用器從遠程出口連接到計算機中心的接口設備上的一種設備 ［裝置］。在發送端, 調制器把信號或脈沖轉換成適當的代碼,并為在通信線路上以電流發送這些代碼作好準備。在接收端,解調器再把這些信號轉換成數字電流,以便通過計算機接口設備向計算機通信。