a service provided over the PSTN as an alternative to customers having their own Private Branch Exchange (PBX), with the PSTN providing the switching of calls between terminals on the customer's site as well as calls to and from other users of the PSTN
Short for central office exchange, it provides typical PBX functions and services However, the equipment is owned by the phone company and located in their central office; they also administer and maintain the equipment Customers pay a monthly fee for the service Centrex was intended to be an alternative to buying a PBX, although some companies use Centrex in conjunction with their PBX
a telephone business service provided by a local phone company from a local central office and provides features directly to each phone at a business without using an on-site PBX (see PBX)
a business telephone service offered by the local telephone company which typically offers the clients many of the more advanced features of a PBX
Centrex is a generic term used to describe an organization's phone switch system where all the switching functions are provided by the phone company's central office equipment
A type of business telephone service that is provided by the local telephone company from its central office It is a single line service that is delivered to the individual desks with added features
A type of private branch exchange service where incoming calls may be dialed direct to extensions without operator assistance Outgoing and intercom calls may be dialed by extension users
A service provided by a central office that provides a virtual PBX to a set of extensions It offers features such as transfer, conference, and forward within that set of extensions
A multiline business telephone service provided from a central office, whereby business customers can get as many telephone stations as they want
A service offered by a Central Office, providing a virtual PBX to a set of extensions It includes features such as call transfer, conference, and forward within that set of extensions
A service that is functionally similar to a customer-premise PBX, but provided by means of equipment located in a Central Office
A call management service that the local telephone company provides at their site where you get local switching features similar to those an on-site PBX provides
A generic name for a feature offered by some Public Network Operators Users have individual direct exchange lines but calls between users are free of charge and calls can be transferred between users A limited set of features is provided to give something that approximates to a virtual telephone system BT brands for this service are Featureline and Featurenet
A service from local telephone companies in the United States in which up-to-date phone facilities at the phone company's central (local) office are offered to business users so that they don't need to purchase their own facilities The Centrex service effectively partitions part of its own centralized capabilities among its business customers Top of Page
A telephone company service which allows direct dialing to individual seven-digit extension numbers from the outside, and, in most cases, three or four-digit dialing internally between extensions, with typical PBX features
A Telco leased service from the local CO, which typically includes intercom, call forwarding, call transfer, toll restrict, least cost routing and call hold on single lines Centrex is a software package which might also include Extended Service Packages like CompuCALL on the Nortel DMS-100
Telephone service, delivered from a telephone company location, offering features/functionality similar to a private branch exchange (PBX)