The portion of a private line circuit which is included in the exchange transmission plant. However, common usage of this term usually excludes information origination/termination equipment. [47 CFR Pt.36-A]

A source of timing located in close proximity to an associated facility, such as a communications station, central office, or node.
Note: The same clock might be a remote clock relative to some other facility.

A communication network within a TMN (telecommunications management network) that supports data communication functions (DCFs) normally at [specified] reference points q1 and q
2. LCNs range from the simple to the complex. LCN examples include point-to-point connections and networks based on star and bus topologies. [After T1.210-1993]

Synonym central office.

A local telephone company, i.e., a communications common carrier that provides ordinary local voice-grade telecommunications service under regulation within a specified service area.

An interconnection between customer premises equipment and telephone central office.

See loop.

Synonym loop.

See measured-rate service.

A node which interfaces directly with customer equipment. [T1.101-1999]