Centrex - A host of IP-PBX service
Centrex, also called "hosted PBX" is a telephone exchange (telephone switch) remotely hosted VoIP service provider (or ITSP) who offers a service for companies.Centrex service existed as a remote for conventional telephone lines, and was now suitable for VoIP communications. Centrex software is part of the ITSP's SIP server. Asterisk, an open source freeware for IP-PBX allows the partition of the server to host multiple companies / users.
Each company that hires the service receives a partition of the SIP server and is assigned to a group of numbers that serve as extensions. Extensions are communicating with each other as if they were within a company and receive a corresponding numbered typical short extensions. CENTREK with the services offered are identical to those of a telephone / telephone switch, including all services as normal preatendedor, call waiting, ACD, IVR, among others.
A user of a Centrex service might think that using a central / switch convention. The same applies to a person outside the company, which does not notice the difference by calling from abroad.
Makes sense for Centrex:
- Short-term business projects or
- Companies that want to migrate to VoIP, but want to experience its benefits and disadvantages
- Companies that can not afford the investment of an IP-PBX
- Companies that suffer strong fluctuations in number of users
A list of firms offering Centrex can be found here below:
Centrex provider charges a base rate per month extension. Additional services are charged as options. The customer can configure all your configuration via a web interface. Companies that use Centrex should have a good Internet connection. The ITSP recommended connections for voice and data separate. The hardware you need is a user of Centrex
- A multi FXS Gateway (if you use conventional phones)
- A switch (if you use IP phones)
