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A central office is defined as the telephone switch controlling connections for one or more central office prefixes. However, it also often denotes the building used to house the inside plant equipment for multiple telephone exchange areas. In North America, the term wire center may be used to denote a central office location, indicating a ...
DMS-10M (prepackaged DMS-10, a Community Dial Office in a pre-packaged container/"box") DMS-100 FAMILY of Digital Exchanges DMS-100 (large local digital Class 5) (also known as an SL-100 when used as CPE (Customer Provided Equipment or PBX service)also known as Centrex.
In the next few years Siemens slowly phased out the DCO as a line side central office switch. The DCO-CS was continued through the 1990s to support regional LD companies. The DCO-CS was small on port capacity (just under 10,000), but was robust on features, more than most other carrier switches.
The two phrases, "customer-premises equipment" and "customer-provided equipment", reflect the history of this equipment.Under the Bell System monopoly in the United States (post Communications Act of 1934), the Bell System owned the telephones, and one could not attach privately owned or supplied devices to the network, or to the station apparatus.
NEBS (Network Equipment-Building System) describes the environment of a typical United States RBOC Central Office. NEBS is the most common set of safety, spatial and environmental design guidelines applied to telecommunications equipment in the United States. It is an industry requirement, but not a legal requirement.
In telecommunications, the term inside plant has the following meanings: . All the cabling and equipment installed in a telecommunications facility, including the main distribution frame (MDF) and all the equipment extending inward therefrom, such as PABX or central office equipment, MDF heat coil protectors, and grounding systems.