PBX

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Related to PBXs: telephone system, Private branch exchange, EPABX

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 ?
Other features not found in ordinary PBXs include remote or cell phone access to the company PBX via login and PIN (this way, internal company extensions and long-distance calling can be made from outside in the field), as well as a variety of integrated Internet / Database / Telephony applications.
This stretches the life of their PBXs and puts off spending hard-to- get capital dollars.
Overall, companies with two or more Open Source PBXs install systems averaging 62 telephones, twice that of all businesses.
According to a recent report by Dell'Oro Group, the trusted source for information about the telecommunications and networking industries, total PBX revenues are projected to exceed $7.
CEDAR RAPIDS, Iowa -- McLeodUSA Incorporated, one of the nation's largest competitive providers of integrated voice and data communication services, announced today that it has introduced an advanced solution for business customers by providing voice and data services that includes direct VoIP (Voice over Internet Protocol) peering between a customer's IP PBX and the McLeodUSA network.
Dialogic gateways provide the audio and signaling link between legacy PBX voice systems and the IP based Exchange Server.
The IP PBX market in China is entering a fast-growth phase, reports In-Stat (http://www.
A wide variety of Asterisk PBXs, premium PBXs developed by such companies as Trixbox, SwitchVox, Epigy, webFones, and other SIP-based PBXs are supported by Gizmo Project.
SAN DIEGO -- Switchvox, a leading provider of IP PBX phone systems for SMBs, today announced that Arreva Communications has joined the Switchvox reseller program, adding to the number of resellers that have come from reselling enterprise PBX systems to the SMB market.
IP Telephony is currently driving PBX market sales as a result of enterprises increasingly adopting Voice over Internet Protocol (VoIP) and retiring their traditional PBX systems," commented Steve Raab, Director of IP Telephony Research at Dell'Oro Group.
Hybrid IP/TDM PBXs are currently a majority of sales during the transition to IP telephony, because they are able to support both a business's legacy TDM equipment and the new IP technology.