PBX


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PBX

(communications)

private branch exchange (PBX)

A private telephone switching system located on the customer’s premises, usually serving an organization (such as a business or government agency). It switches telephone calls within a building and also to an outside telephone network.

PBX

PBX

(Private Branch eXchange) An inhouse telephone switching system that interconnects telephone extensions to each other as well as to the outside telephone network (PSTN). A PBX enables a single-line telephone set to gain access to one of a group of pooled (shared) trunks by dialing an 8 or 9 prefix. PBXs also include functions such as least cost routing for outside calls, call forwarding, conference calling and call accounting. Modern PBXs use all-digital methods for switching, but may support both analog and digital telephones and telephone lines. See IP PBX and WPBX.


An Early PBX
This PBX began operation in Bangor, Maine in 1883. (Image courtesy of AT&T.)









A Field Switchboard
This portable commutator was a one-wire telegraphic switchboard for military field service in 1914. Made by Northern Electric (now Nortel Networks), it was one of the first communications products built for the battlefields of World War I. (Image courtesy of Nortel Networks.)
References in periodicals archive ?
Not only is it less expensive, but compared with proprietary PBX solutions, because it is open, the Denphone platform is fully programmable and expandable.
Another solution, although it could be costly for some companies, is to add passwords and coding to their PBX system, he added.
In addition to the new international calling plan, Virtual PBX also updated its affiliate program.
The company operates the largest Open Source PBX market research practice in the world.
It's a great fit for businesses already using or considering the use of a next generation IP PBX.
Sphere Communications is the first to deliver IP PBX technology as a business application for Service Oriented Architecture.
Providing PBX functionality to users' mobile phones can provide businesses the power to simplify management of voice services.
As VoIP gateways become critical components of new unified communications systems and solutions, complementing and potentially replacing traditional PBX infrastructure altogether, the ability to provide secure and reliable voice signaling and transport increases in importance.
The Dialogic gateway portfolio includes the T1/E1-IP Media Gateway providing single, dual and quad density T1/E1 PBX connections and a series of PBX-IP Media Gateways providing 8 ports of specific PBX station protocol emulation or analog FXO connectivity.
The report also reveals that enterprise PBX market revenues climbed 9 percent over the same quarter a year ago partly on strong sales in Europe.
The IP PBX market in China is entering a fast-growth phase, reports In-Stat (http://www.