Synonym certificate.

A means for conveying information from one point to another in digital form. A digital channel may be implemented on a network composed of digital communications components. [T1.80
1. 04-1997]

A combination of two digital transmission channels permitting bidirectional digital transmission in both directions between two points, to support a single communication. [T1.206-1988]

A patch bay in which low-level digital data circuits can be patched, monitored, and tested.
Note: A digital circuit patch bay can be either "D" type (unbalanced) or "K" type (balanced).

A method of interfacing digital data signals, in either synchronous or asynchronous mode, without converting the data into a quasi-analog signal.

A computer that consists of one or more central processing units (CPUs), that is controlled by internally stored programs, and that stores and processes data in digital form.

A network element that is used to arrange lower level digital signals among higher level digital bit streams. For example, DS0s among DS1s, DS1s among DS3s, or DS3s among OC3s, etc. [After T1.217-1991]

1. Data represented by discrete values or conditions, as opposed to analog data.
2. Discrete representations of quantized values of variables, e.g., the representation of numbers by digits, perhaps with special characters and the "yyspace" character.

A generic description for synchronous digital transmission operating up to 64 kb/s. [T
1. Rpt39-1995]

1. A synchronous system providing for full-duplex, end-to-end transmission of digital data at the subrate data channel rates of
2. 4,
4. 8,
9. 6,
1
9. 2, 56 and 64 kb/s rates on dedicated private line and multipoint circuits. [After T
1. Rpt25-1993]