A frame that is not delivered to the destination user within an agreed-upon measurement period, and the network is responsible. The procedure used to reach agreement on the measurement period should allow for the possibility that more than one network may be involved in the connection. [After T1.615-1992]

See LEO.

Any frequency in the band from 30 kHz to 300 kHz. See electromagnetic spectrum.

Synonym low-level signaling.

Synonym computer-oriented language.

Modulation of a signal, e.g., a carrier, at a point in a system or device, such as a radio transmitter, where the power level is low compared to the final output power.

The use on signal lines of voltage levels that are between the limits of positive and negative 6 volts. Synonym low-level keying.

A filter network that passes all frequencies below a specified frequency with little or no loss, but strongly attenuates higher frequencies.

1. Equipment that has imprecise characteristics that do not meet system reliability requirements.
2. In military communications, equipment that has insufficiently exacting characteristics to permit its use in trunks or links.
Note: Low-performance equipment may be used in loops if it meets loop performance requirements.
3. Tactical ground and airborne equipment that (a) has size, weight, and complexity characteristics that… (Read More →)

A restricted radiation device, exclusive of those employing conducted or guided radio frequency techniques, used for the transmission of signs, signals (including control signals), writing, images and sounds or intelligence of any nature by radiation of electromagnetic energy. Examples: Wireless microphone, phonograph oscillator, radio-controlled garage door opener, and radio-controlled models. [NTIA]