Patent ID: 6285672
Filing Date: 2001-09-04
Classification: H04M

Abstract:
A subscriber line interface card for enhanced point to point communication across the public switched telephone network, comprising:a first switch adapted to receive a user output signal and couple the user output signal to a first output or a second output;a data receiver coupled to the first output of the first switch to receive the user output signal, the data receiver adapted to generate a data receiver output from the user output signal when the user output signal is coupled to the data receiver by the first switch;an ADC (analog to digital converter) coupled to the second output of the first switch to receive the user output signal, the ADC adapted to generate an ADC output from the user output signal when the user output signal is coupled to the ADC by the first switch;a second switch adapted to transmit a user input signal, the user input signal received via a first input or a second input;a data transmitter coupled to the first input to the second switch, the data transmitter adapted to generate a data transmitter output from a received digital network signal and couple the data transmitter output to the first input of the second switch;a DAC (digital to analog converter) coupled to the second input of the second switch, the DAC adapted to generate a DAC output from the received digital network signal and couple the DAC output to the second input of the second switch; anda controller circuit coupled to the first switch and the second switch, the controller circuit adapted to configure the first switch and second switch for efficient data transmission and reception via the data receiver and data transmitter, or configure the first switch and second switch for conventional communication via the ADC and the DAC.