Abstract: Disclosed are a method and bi-directional communication device, such as a cable modem, for iteratively performing the following steps for each of a plurality of communications channels until a downstream data signal is detected. Selecting a communications channel and checking for a downstream signal having a first bandwidth complying with a first system interface standard, and if the downstream signal having said first bandwidth is not detected, then checking the communications channel for a downstream signal having a second bandwidth complying with a second system interface standard.

Abstract: A security system for use in a distributed network includes a service provider selectively accessible via a network by a plurality of end users each having an access device for accessing the network. A control mechanism is included which is disposed at a location of the service provider and accesses and modifies stored information on each access device of the end users to designate portions of the information to prevent access thereof by the end users.

Abstract: A system and method for providing on-demand battery backup to cable telephony devices comprising converting AC main power to DC power 102, charging a battery 104, providing regulated power to the cable modem device 106, detecting the presence of AC main power 108, providing a signal to the cable modem device to indicate that AC main power is not present 110, detecting said signal by said cable modem device 112, entering sleep mode and disabling said telephony interface 114, exiting sleep mode and enabling a telephony interface by said cable modem device upon activation of said cable telephony device 116, and signaling telephony service availability by said cable modem device 118.

Abstract: Disclosed are a method and bidirectional communication device, such as a cable modem, for iteratively performing the following steps for each of a plurality of communications channels until a downstream data signal is detected. Selecting a communications channel and checking for a downstream signal having a first bandwidth complying with a first system interface standard, and if the downstream signal having said first bandwidth is not detected, then checking the communications channel for a downstream signal having a second bandwidth complying with a second system interface standard.