Abbreviation. dB in reference to 1 mW at 600 ohms, equal to
0. 775 V, mainly used in audio systems (e.g., to measure audio levels in broadcasting as an audio reference) and in analog telephony. Also used in reference to
0. 775 V from low-impedance outputs and high impedance inputs.
Note: These are measurements of an audio voltage, not power.

Abbreviation. dB relative to 1 volt peak-to-peak.
Note: The dBv is usually used for television video signal level measurements. [From Weik '89]

Abbreviation. dB referenced to one watt.

Abbreviation. dB above reference coupling.
Note: dBx is used to express the amount of crosstalk coupling in telephone circuits. dBx is measured with a noise measuring set. [From Weik '89]

Abbreviation for direct current.

A patch bay in which dc circuits are grouped.

Abbreviation for Defense Communications Agency. Now DISA (Defense Information Systems Agency).

1. Abbreviation for data circuit-terminating equipment.
1. In a data station, the equipment that (a) performs functions, such as signal conversion and coding, at the network end of the line between the data terminal equipment (DTE) and the line, and (b) may be a separate or an integral part of the DTE or of intermediate equipment.
2. The interfacing equipment… (Read More →)

A call control signal transmitted by data circuit-terminating equipment (DCE) to indicate that it is clearing the associated circuit after a call is finished.

A call control signal at the data-circuit-terminating-equipment/data-terminal-equipment (DCE/DTE) interface that indicates that the DCE is ready for another event in the call establishment procedure.