central office


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Related to central office: Telephone switching

central office

[′sen·trəl ′ȯ·fəs]
(communications)
A switching unit, installed in a telephone system serving the general public, having the necessary equipment and operating arrangements for terminating and interconnecting lines and trunks. Also known as telephone central office.

central office

(communications)
The place where telephone companies terminate customer lines and locate switching equipment to interconnect those lines with other networks.

central office

A local telephone company switching center. There are two types of central offices (COs). The first is called an "end office" (EO) or "local exchange" (LE) and connects directly to the outside plant, which is the feeder and distribution system to homes and offices. The end office (often called a "Class 5 office") provides customer services such as call waiting and call forwarding.

Tandem/Toll Office
The second type is the tandem office (also toll office or tandem/toll office), which is a central office that does not connect directly to the customer. Toll call record generation and accounting used to be handled in the tandem offices. Today, the billing is mostly done in the end offices. There are more than 25,000 central offices in the U.S. See LEC, IXC and LATA.



Central Offices
End offices provide the local loops directly to customers, while tandem offices carry traffic between end offices. The PSTN is made up of local exchange carriers (LECs) and interexchange carriers (IXCs) that are governed by LATA boundaries.


Central Offices
End offices provide the local loops directly to customers, while tandem offices carry traffic between end offices. The PSTN is made up of local exchange carriers (LECs) and interexchange carriers (IXCs) that are governed by LATA boundaries.






Central Offices
End offices provide the local loops directly to customers, while tandem offices carry traffic between end offices. The PSTN is made up of local exchange carriers (LECs) and interexchange carriers (IXCs) that are governed by LATA boundaries.








High-Tech Switching in the 19th Century
This "central office" was used to switch phone calls between all the lawyers in Richmond, Virginia in 1882. (Image courtesy of AT&T.)
References in periodicals archive ?
Field staff come to the Central Office early each Monday and leave on Friday at noon.
Consider the number-one decentralization "strategy" issued by the administration: "Disassemble the Central Service Center" at the central office.
Baker's council also initiated a plan to change the school's hours, measured support for the plan in the school community, and petitioned the central office to put the plan into practice.
But work performed in the central office is essential to operations in the branches, said Kit Willis, children's librarian at the Ojai branch library.
Eight hundred unnecessary central office staff members should go--and the tens of millions recovered should be immediately infused into the needy, crumbling schools.
The deployment consisted of a central office switch homerun architecture with all the fibers terminated within the central office, along with the 1x32 splitters.
The ADAA Board of Trustees will consider the reactivation of a toll free number for Central Office.
PETAH TIKVA, Israel -- ECI Telecom (NASDAQ: ECIL) today announced its new family of Hi-FOCuS(TM) MiniShelf(TM) solutions, which brings to any remote location advanced broadband capabilities previously available only in the central office, thus creating the first Virtual Central Office solution.
Such is life when your daytime home is a portable structure next to a central office that holds only about one-third of the district's administrative staff.
This first integration of an analog xDSL filter (ADSL/ADSL2+/VDSL2) in silicon translates into significant operational savings with more efficient use of available remote terminal and central office space.
Further Enhances ADC's Growth Strategy To Become The Global Communications Network Infrastructure Leader By Building Scale In Fiber Connectivity From The Central Office, Through The Outside Plant To Customer Premises
Huawei has selected BroadLight for both its central office and customer premise equipment which consists of ITU-T PON controllers, transceivers and software and is expected to deploy its new PON products in volume throughout the world.

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