A stored program electronic system associated with one or more toll switching systems which provides centralized traffic service position functions for several local offices at one location. [47 CFR Pt.36-A]

A general term, ordinarily applied to trunks between manually operated switchboard positions and local dial central offices in the same wire center. [47 CFR Pt.36-A]

Open Pluggable Edge Services

Operational Expenditure

Acronym for operations security.

See fiber amplifier, optical repeater.

In optical communications, a device used to reduce the power level of an optical signal.
Note 1: Optical attenuators used in fiber optic communications systems may use a variety of principles for their functioning. Those using the gap-loss principle are sensitive to the modal distribution ahead of the attenuator, and should be used at or near the transmitting end, or… (Read More →)

1. Of a refractive or reflective optical element, the straight line that is coincident with the axis of symmetry of the surfaces.
Note: The optical axis of a system is often coincident with its mechanical axis, but it need not be, e.g., in the case of an off-axis parabolic reflector used to transmit signals to, or receive signals from, a… (Read More →)

See beamsplitter.

See fiber optic cable.