The channel used on ISDN to communicate signaling and other related information. Use of the D channel leaves the B channels free for data communication.
A connectors that is shaped like a letter D and uses pins and sockets to establish connections between peripheral devices, using serial or parallel ports. The number that follows DB in the name of a D connector is the number of pins used for connectivity; for example, a DB-9 connector has 9 pins and a DB-25 connector has 25 pins.
A service or process that runs on a Unix or Linux server.
A device on an FDDI network that is connected to both rings. Compare with SAS.
A tape recording ...