DAA Technology Abbreviation

Data Access Arrangement

A Data Access Arrangement (DAA) is an electronic interface within a computer and its modem to a public telephone line. A Data Access Arrangement is also sometimes called a Telephone Line Interface Circuit (or Module). Data Access Arrangement are required in any device that attaches to the public switched telephone network ( PSTN ), including fax machines, private branch exchange , set-top box , and alarm systems. Among other things, the Data Access Arrangement isolates the electronic device from the higher voltage on the telephone line. Data Access Arrangement circuitry requires registration with the telephone system governing authority (such as the Federal Communications Commission in the U. S.). However, most manufacturers of modems and other devices build an already-approved DAA design into the modem.