Other Definitions
centrex (dict)
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CentrexCentrex is a contraction of central exchange, a kind of telephone exchange. A PBX service providing switching at the central office instead of at the company premises. Typically, the telephone company owns and manages all the communications equipment necessary to implement the PBX and then sells various services to the company. However no switching equipment resides on the customer premise as the service is supplied and managed directly from the phone company's exchange site, with lines being delivered to the premises either as individual lines over traditional copper pairs, or delivering many lines multiplexed to the premises over fibre optic or copper links, eliminating the need to bring many individual pairs from the exchange to the premises. Centrex obviates the need to use separate exchange lines delivered to a site for use with a Key System or PBX. Instead, telephone extensions, called Centrex lines, are delivered directly from the local exchange to the user. Unlike with a conventional PBX, it is a simple matter to have extensions at different locations, yet allow them to function as if they were within the same building. Facilities such as Direct Inward Dial (DID), where individual extensions are offered a direct and unique telephone number for incoming calls, become standard features in a Centrex environment. Stations may also be part of a hunt group, allowing for automatic distribution of incoming calls to two or more extensions. Example Applications - Small business start-ups (growth and costs)
- Banks and financial institutions (branch offices/multi-departmental branches)
- Professional offices (reliability, connectivity and customer service)
- Local government (reliability, cost, multi-location)
- Hotels and guest houses (customer service)
- Colleges and Universities (reliability, cost, multi-location, growth)
Services - Call Transfer
- Call Divert on no reply /on busy
- Call Waiting
- Three Party Conference
- Call Pick Up (Group)
- Ring Back
- Reminder / Alarm Call
- Last Number Redial
- Centrex Hotline (non-dialled connection)
- Centrex Warm Line (delayed Hotline)
- Centrex Hunt Groups, with optional bypass numbers
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