Data communication apparatus having bandwidth selection capabilities
AssigneeCanon Kabushiki Kaisha
InventorsTakashi Takeda, Hiroshi Hamada, Haruo Ishizuka, Kanichi Yoshino, Yoshihisa Tadokoro, Naoyuki Matsumoto
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Abstract
A data communication apparatus includes a command receiving unit for receiving a command for setting up a call; a discriminating unit for discriminating a bearer capability included in the command received by the command receiving unit; and a judging unit for judging if a modem is to be used or not, in accordance with a discrimination result by the discriminating unit.
Claims11
A data communication apparatus for communicating data over a line operable at a plurality of bearer capabilities, said apparatus comprising:
- a modem having a bearer capability;
- command receiving means for receiving a command for setting up a call with a transmitter of the command over the line, said command including a bearer capability of the transmitter;
- discriminating means for discriminating the bearer capability included in the command received by said command receiving means to produce a discrimination result indicating whether the included bearer capability corresponds to the bearer capability of said modem;
- and
- selecting means for selecting whether said modem is to be used or not in the call corresponding to the command, in accordance with the discrimination result of said discriminating means.
A data communication apparatus comprising:
- a modem;
- notifying means for notifying a reception terminal that data is to be transmitted in a call thereto without using said modem;
- receiving means for receiving a response signal from the reception terminal in response to the notification;
- discriminating means for discriminating whether the response signal is an enable signal indicating that the reception terminal can receive data transmitted without using the modem;
- and
- data transmitting means for transmitting data to the reception terminal without using said modem when said discriminating means discriminates that the response signal is the enable signal.
A data communication apparatus according to claim, 8, further comprising means for disconnecting the call when said discriminating means discriminates that the response signal is the disable signal, and then notifying the reception terminal that data is being transmitted by using said modem.
Dependencies are inferred from the claim text.