A modem utilizing a DAA having line side circuitry including a telephone network interface and system side circuitry including a host system interface. The line side circuitry and the system side circuitry are separated by a high voltage isolation barrier. In accordance with the invention, the high voltage...http://www.google.de/patents/US6359973?utm_source=gb-gplus-sharePatent US6359973 - Data access arrangement utilizing a serialized digital data path across an isolation barrier
