Cisco Technology, Inc.

Datum, Inc.

Christopher C Ott

G Wayne Brush

Michael F Biskobing

Richard E Funderburk

An optical line interface assembly for insertion in a slot of a communications equipment rack includes a board having serial interfaces formed to couple to optical interface modules. The interface assembly also includes optical interface modules removably coupled to the serial interfaces to permit replacement of selected optical interface modules while the remaining optical interface modules remain coupled to optical signal lines.

Removable optical interface modules

A method for training a modem includes selecting a transmission rate from one of a plurality of bauds, each baud identifying at least one transmission rate. The method also includes attempting to train the modem at the transmission rate and measuring the signal quality after the modem trains. The method further includes accessing a table of acceptable signal qualities, the table corresponding to the baud of the first transmission rate. In addition, the method includes comparing the measured signal quality to at least one acceptable signal quality identified by a provisioned margin in the table to determine if the measured signal quality is acceptable.

Method and system for training a modem

An apparatus for generating a precision frequency includes a receiver that tracks a CDMA pilot signal and extracts frequency and phase information. This information is then used by a processor to control a precision oscillator. The precision oscillator generates a precise frequency based on the CDMA pilot signal. Time of day information is also extracted by the receiver and processor.

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Briarcliff, TX, United States of America

Christopher C Ott