Method and system for achieving improved data transmission through the public switched telephone network

A subscriber line interface card for providing full duplex 64 Kbps data communication across the public switched telephone network, comprising:

• a data receiver coupled to receive a user output signal from a user and adapted to generate a data receiver output therefrom;
• an ADC (analog to digital converter) coupled to receive the user output signal and adapted to generate an ADC output therefrom;
• a data transmitter adapted to generate a data transmitter output from a received digital network signal and couple the data transmitter output to the user;
• a DAC (digital to analog converter) adapted to generate a DAC output from the received digital network signal and couple the DAC output to the user;
• and
• a controller circuit, the controller circuit adapted to configure the data receiver and data transmitter for efficient data transmission and reception by transmitting the user output signal via the data receiver and coupling the data transmitter output to the user, the controller circuit further adapted to configure the ADC and the DAC for conventional communication by transmitting the user output signal via the ADC and coupling the DAC output to the user.

A method for providing full duplex 64 Kbps data communication across the public switched telephone network by using a subscriber line interface card, the method comprising the steps of:

• a) replacing a conventional subscriber line interface card from first user's local exchange with a subscriber line interface card;
• b) establishing conventional communication between the first user and a second user via the subscriber line interface card;
• c) receiving a configuration instruction in the subscriber line interface card from the first user;
• and receiving a configuration instruction in the subscriber line interface card from the second user;
• d) configuring the subscriber line interface card for efficient data transmission;
• and
• e) transmitting and receiving data between the first user and the second user at an efficient data transmission rate of approximately 64 Kbps.

A method for providing full duplex 64 Kbps data communication across the public switched telephone network by using a subscriber line interface card, the method comprising the steps of:

• a) replacing a conventional subscriber line interface card from first user's local exchange with a subscriber line interface card;
• b) establishing conventional communication between the first user and a second user via the subscriber line interface card;
• c) receiving a configuration instruction in the subscriber line interface card from the first user;
• d) configuring the subscriber line interface card for efficient data transmission, and switching an A law analog to digital converter and an A law digital to analog converter, included in the subscriber line interface card, out of the transmitting and receiving path between the first user and the second user;
• and
• e) Transmitting and receiving data between the first user and the second user at an efficient data transmission rate of approximately 64 Kbps.

A method for providing full duplex 64 Kbps data communication across the public switched telephone network by using a subscriber line interface card, the method comprising the steps of:

• a) replacing a conventional subscriber line interface card from first user's local exchange with a subscriber line interface card;
• b) establishing conventional communication between the first user and a second user via the subscriber line interface card;
• c) receiving a configuration instruction in the subscriber line interface card from the first user;
• d) configuring the subscriber line interface card for efficient data transmission, and switching a μ law analog to digital converter and a μ law digital to analog converter, included in the subscriber line interface card, out of the transmitting and receiving path between the first user and the second user;
• and
• e) transmitting and receiving data between the first user and the second user at an efficient data transmission rate of approximately 64 Kbps.