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System and method for communicating with a telco-return cable modem as a single communications device

  • US 6,295,554 B1
  • Filed: 05/27/1998
  • Issued: 09/25/2001
  • Est. Priority Date: 05/27/1998
  • Status: Expired due to Fees
First Claim
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1. A method of providing a program interface to a cable modem with telephony return in a computer comprising a user level, an operating system level comprising a standard interface for communicating with the RF interface and the PSTN interface, and a driver level for communicating hardware that implements the RF interface and the PSTN interface, comprising the steps of:

  • providing a protocol driver for connecting an application to a network and a standard modem service for connecting the protocol driver to a public-switched telephone network (PSTN) interface;

    configuring a PSTN-connected modem driver using the standard modem;

    providing a cable modem driver for communicating with a radio frequency interface for receiving downstream data from a high frequency coaxial cable (HFC) and for receiving upstream data from the application; and

    providing an inner protocol driver at the driver level for receiving upstream data from the cable modem driver and for sending the upstream data to the PSTN-connected modem driver.

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