Patent ID: 6647101
Filing Date: 2003-11-11
Classification: H04M

Abstract:
A data access arrangement, comprising:a high voltage isolation barrier having a first side and a second side, and a first capacitor and a second capacitor; system side circuitry coupled to the first side of the high voltage isolation barrier, the system side circuitry configurable to communicate with host system circuitry and comprises a first transceiver circuit for bidirectional communications with the high voltage isolation barrier; and line side circuitry coupled to the second side of the high voltage isolation barrier, the line side configurable to communicate with a telephone network and comprises a second transceiver circuit for bidirectional communications with the high voltage isolation barrier, the first and second transceiver circuits configured to transmit/receive differential signals across the first and second capacitors to communicate the serialized digital information, wherein data and control information are communicated between the system side circuitry and the line side circuitry across the high voltage isolation barrier in a serialized digital format, wherein the high voltage isolation barrier further comprises circuitry configurable to provide a clock signal from the system side circuitry to the line side circuitry, and wherein the serialized digital information is communicated at approximately one half of the frequency of the clock signal.