Communication apparatus for selecting a communication protocol compatible to a partner station and executing the selected protocol

摘要

A communication apparatus includes a first detection circuit which detects a call signal, and a second detection circuit detects information of a partner station sent between call signals. A memory circuit stores information of a communication system of the partner station in association with the information of the partner station. A reading circuit reads the information of the communication system for the detected information of the partner station from the memory circuit in accordance with the information of the partner station detected by the second detection circuit at the time of the detection of the call signal and executes the communication protocol in accordance with the read information of the communication system.