Patent ID: 6683548
Filing Date: 2004-01-27
Classification: H04B,H04L,H04M

Abstract:
Phone line direct access arrangement circuitry configured to isolate a system side integrated circuit device from a phone line through a plurality of isolation elements, comprising:a system side integrated circuit device configured to communicate a first digital differential signal to at least two of the plurality of isolation elements, the at least two isolation elements comprising at least a first isolation capacitor and a second isolation capacitor, wherein the system side integrated circuit device is further configured to be isolated from the phone line in order to satisfy phone line isolation regulatory standards; a line side integrated circuit device configured to communicate a second digital differential signal to the first isolation capacitor and the second isolation capacitor so that the first and second digital differential signals are communicated across the same first and second isolation capacitors and so that the first and second isolation capacitors bidirectionally transfer the first and second digital differential signals, the line side integrated circuit device further configured to provide an output signal for sending data to a phone line; wherein the system side integrated circuit device is further configured to provide a clock signal to the line side integrated circuit device through at least one of the plurality of isolation elements; and wherein the system side integrated circuit device and the line side integrated circuit device are configured so that power is capable of being provided from the system side integrated circuit device to the line side integrated circuit device while still maintaining the isolation required by the phone line isolation regulatory standards.