noun
automatic calling and answering unit
A computing device that automatically places and receives calls; used in telephony and modem contexts.
この自動発着信装置は、夜間のデータ転送に使われている。
This automatic calling and answering unit is used for nighttime data transfers.
Compound of 自動 (automatic), 発信 (outgoing call/transmission), 着信 (incoming call/reception), and 装置 (device).