ER

equipment ready (signal)
(データ通信での)データ端末レディ(信号). モデム制御信号名.
equipment ready (signal); or DTR(data terminal ready); a modem control signalin a data communication protocol; #20 pin of DB25S connector of a computer; ref. FG(frame ground), SD(send data) orTxD(transmit data), RD(rece

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