Cisco Technology, Inc.

Michael A Issaa

Steven Chow

A method and apparatus for enabling multiple protocol communication over a network are disclosed. A first circuit communicates first signals in a first frequency band using a first data protocol and attenuates second signals in a second frequency band using a second data protocol. The first data protocol supports a first modulation technique and a second modulation technique. A second circuit communicates the second signals in the second frequency band using the second data protocol.

Method and apparatus for enabling multiple protocol communication over a network

A filtering device ( ) for active filtering at a customer premises includes an input interface that receives telephone signals and digital data signals communicated from a central office ( ) using a telephone line ( ). The filtering device ( ) further includes an active low-pass filter ( ) that receives the telephone signals, the digital data signals, and electrical power from a power source. The active low-pass filter ( ) attenuates the digital data signals and passes the telephone signals using the electrical power. The filtering device ( ) also includes an output interface that receives the telephone signals from the active low-pass filter ( ) and communicates the telephone signals to a telephone ( ).

System and method for active filtering in a telecommunications network

A line card or other telephone or communications interface provided with a ringing SLIC outputs relatively high voltage, such as in excess of about 90 volts, and/or relatively high current such as in excess of about 20 milliamps during normal use, but decreases the voltage or current of a ringing signal or other signal upon occurrence of a tip and/or ring line fault or other abnormal condition. The abnormal condition is detected by measuring voltage and/or current on the tip line and/or ring line. In response to an excess voltage or current, the ringing current or other output current is reduced to achieve desired safety and/or compliance with standards.

Ringing SLIC fault handling

An improved PC/ connector includes a pin by pin isolation mechanism to allow a standard PC/ connector pin to transmit non-PC, vendor-specific I/O signals between stacked PC/ modules.

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Campbell, CA, United States of America

Michael A Issaa