| 摘要 |
The present invention provides a self-contained device for using a single telephone line to receive telephone calls while being simultaneously connectable to the Internet that avoids the disadvantages of the prior art, and a self-contained device for using a single telephone line to receive telephone calls while being simultaneously connectable to the Internet that is simple to use and yet may function in telephone systems which require DTMF codes in order to activate "call waiting" features. The present invention further provides a self-contained device using a single telephone line to receive telephone calls while being simultaneously connectable to the Internet. The device includes a single housing, a telephone/answering machine jack connected to a telephone/answering machine, a modem jack connected to a computer, a telephone line jack connected to a telephone outlet, a micro-processor and tone detectors communicating with the micro-processor, a DTMF tone generator operatively conn ected to and under the control of the micro-processor, telephone line isolation and input amplification and filtration communicating with, and between, the tone detectors and the telephone line jack, a tone select communicating with tone detectors, display and ring buzzer communicating with the micro-processor, control relays communicating with the status detect (on/off hook), and output drivers communicating with the micro-processor. In a method embodiment, the invention teaches that DTMF tones may be used to activate call waiting and thus avoid interruption of Internet access on a single telephone line when an incoming call arrives.
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