Communication system, communication method, and communication adapter

A communication method using a communication system in which a telephone exchange, a telephone communication terminal, and a communication adapter that transmits and receives a signal about a call between the telephone exchange and the telephone communication terminal are connected with each other, the method comprising:

• transmitting information on an event to the telephone communication terminal by first communication with the telephone communication terminal, when detecting the event related to the call, using the communication adapter,
• making a notification of an occurrence of the event, based on the information on the event transmitted from the communication adapter, using the telephone communication terminal;
• and
• transmitting a signal indicating completion of response preparation for the event in the telephone communication terminal, to the telephone exchange, after the notification of the occurrence of the event, using the communication adapter.

A communication system comprising:

• a telephone exchange;
• a telephone communication terminal;
• and
• a communication adapter that transmits and receives a signal about a call between the telephone exchange and the telephone communication terminal,
• wherein the communication adapter performs a process for interconnection with the telephone communication terminal, between the telephone communication terminal and the communication adapter, by using first communication, when detecting an event related to connection with the telephone communication terminal,
• wherein the telephone communication terminal transmits information on the telephone communication terminal to the communication adapter by using second communication, after the process for interconnection with the communication adapter, and
• wherein the communication adapter transmits a signal indicating presence of a telephone communication terminal capable of performing the second communication with the communication adapter to the telephone exchange, based on information on the telephone communication terminal.