A pseudoternary signal, representing binary digits, in which (a) successive "marks" are of alternately positive and negative polarity and the absolute values of their amplitudes are normally equal and (b) "spaces" are of zero amplitude. Synonym bipolar signal.

In multilevel precedence and preemption, the call receiver, i.e., the destination user, to which a precedence call will be diverted.
Note 1: Diversion will occur when the response timer expires, when the call receiver is busy on a call of equal or higher precedence, or when the call receiver is busy with access resources that are non-preemptable.
Note 2: Alternate… (Read More →)

A second or subsequent choice path between two points. [T
1. Rpt24-1993]

1. The routing of a call or message over a substitute route when a primary route is unavailable for immediate use.
2. In signaling, the process of allocating substitute routes for a given signaling traffic stream in case of failure(s) affecting the signaling links or routes involved in the normal routing of that signaling traffic stream. [T1.226-1992]
3. In signaling,… (Read More →)

Synonym half-duplex (HDX) operation.

1. In signaling, the process of allocating substitute routes for a given signaling traffic stream in case of failure(s) affecting the signaling links or routes involved in the normal routing of that signaling traffic stream. [T1.226-1992]
2. In signaling, the routing of a given signaling traffic flow in case of failures affecting the signaling link(s), or route(s), involved in the… (Read More →)

The altitude of the apogee or perigee above a specified reference surface serving to represent the surface of the Earth. [NTIA] [RR]
Note: In technical usage, the definite article is not used with the term apogee or perigee alone. A body orbiting the Earth is said simply to be "at apogee" or "at perigee. "It may, however, properly be said… (Read More →)

Abbreviation for arithmetic and logic unit.

Abbreviation for amplitude modulation.

Access Management Functional Entity