DAA
Short for Data Access Arrangement, part of a modem��s system for interfacing with a telephone network. The DAA provides the analog circuits that electrically isolate the modem from the phone line, separating the modem from the telephone line��s higher voltage. The FCC requires this feature of any device that connects to the PSTN, including fax machines and set-top boxes, and most manufacturers build modems around an FCC-approved DAA design.
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- DAC
(1) Short for digital-to-analog converter. (2) Short for Discretionary Access Control.
- DACS
Short for digital access and cross-connect system.
- DAFS
Short for Direct Access File System.
- DAL
Short for dedicated access line, a telecommunications line that reserves its data transmission capability for a specific user. The DAL typically is supplied by the local telephone company, but the local company does not switch calls on the line.
- DAMA
Short for Demand-Assigned Multiple Access, DAMA is a satellite channel access protocol that provides a highly efficient means of instantaneously assigning channels in a transponder according to immediate traffic demands. DAMA essentially matches user demands to available satellite capacity.