A transmission line in a long-distance communications network.
Note: Examples of long lines are TDM and FDM carrier systems, microwave radio links, geosynchronous satellite links, underground cables, aerial cables and open wire, and submarine cables.

A silent interval during a ringing cycle or pattern that lasts at least 1200 ms. [T1.401-1998]

In fiber optic communications, pertaining to optical wavelengths greater than 1 m.

Any telephone call to a destination outside the local service area of the calling station, whether inter-LATA or intra-LATA, and for which there is a charge beyond that for basic service. Synonym toll call.

1. In public switched networks, pertaining to circuits that span large distances, such as the circuits in inter-LATA, interstate, and international communications.
2. In the military community, communications among users on a national or worldwide basis.
Note 1: Compared to tactical communications, long-haul communications are characterized by (a) higher levels of users, such as the National Command Authority, (b) more… (Read More →)

See loran.

See loran.

Bit error rate measured over a sufficiently long period, for example, one month. [T1.226-1992]

Of an oscillator, the degree of uniformity of frequency over time, when the frequency is measured under identical environmental conditions, such as supply voltage, load, and temperature.
Note: Long-term frequency changes are caused by changes in the oscillator elements that determine frequency, such as crystal drift, inductance changes, and capacitance changes.

1. The electrical symmetry, with respect to ground, of the two wires of a pair
2. An expression of the difference in impedance of the two sides of a circuit.