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 ?
Still, council members and principals expressed frustrations that were common to all: that the councils lacked any kind of defined authority and that the central office rarely supported their activities and ideas.
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.
Textbooks and supplies, all routed through the central office, routinely take 90 days to be delivered to teachers--who sometimes give up waiting and buy the stuff themselves.
Corning was able to provide a solution that gave us the fiber management we required from the central office," said Steven Meadows, sales manager at Telepak.
Those wishing to comment on the service should contact the ADAA President, Karen Waide at Central Office (Suite 1730, 35 East Wacker Drive, Chicago, IL 60601) or by e-mail at adaa1@aol.
The Hi-FOCuS MiniShelf family provides operators the ability to bring the full Central Office capabilities much closer to the customer, thereby providing improved delivery of cutting edge broadband and video services, including streaming HDTV and personalized IPTV services.
Soon before the move to a brand new central office facility large enough to hold everyone, Superintendent Kathleen Klink said that being together for idea-sharing was what the team looked forward to most.
affiliated to the group of HF Company (Eurolist group C), conceives, develops and markets xDSL filters for Central Office and Customer Premise as well as gateways and PLC modems (Power Line Connection) for the distribution of the services "Triple Play" high speed internet access (Internet, VOIP, Broadband TV) in a premise.
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.
As equipment was acquired from various sources, Phillips began restoring and reselling the decommissioned central office and transmission equipment.
s new Manhattan Central Office (CO) is now fully interconnected with its Montreal Network and as a result, the popular teliPhone(TM) service will now be available in New York, Newark, Boston, Los Angeles, San Francisco, Miami and Chicago.

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