PBX refers to Private Branch Exchange, with a single external number (or some limited external numbers) allotted and this will be shared among the users; this switching system is meant for internal communications, though there will be a number of external lines for making phone calls (being shared among the users) to the outsiders through the PSTN (Public Switched Telephone Network). Each PBX-connected terminal like a telephone or fax or computer modem is considered as an extension, with a particular extension number, as per the organizational numbering plan, allotted to it. In tune with the latest developments in the PBX Phone System setup, Internet Protocol (IP) is used for handling the phone calls, under the name of IP PBX.
There are four branches in the PBX phone system viz., the traditional PBX, Hosted/ Virtual PBX, IP PBX. The main advantage of the PBX systems is the savings in cost of making internal communications. But, with the growth of telephony technology, lots of capabilities and features are being added to cope up with the requirements of the users. To meet the growing demands of the public, there are many companies, offering many facilities in their products, to make them distinctly different from other similar competing products. Some of the common capabilities are auto dialing/ attendants, automatic call distributor/ ring back, Call blocking/ logging/ forwarding (when engaged or unattended)/ pick-up/ transfer/ waiting/ conferencing, customized abbreviated or speed dialing, DND, Follow-me or Find-me, IVR (Interactive Voice Response), CDR/ SMDR, etc., (though each company assigns a different nomenclature for the same facility).
There are many standard interfaces, for establishing connections among the extensions, trunk lines and PBX like DECT (for cordless phones), IP, Plain Old Telephone Service (POTS) or proprietary protocols as defined by the respective manufacturers DPNSS, ISDN, etc.
There are also hosted PBX systems in which all the features are provided by the service provider from the equipments installed at his location, remote from the users’ locations. There are also mobile PBX systems, which is classified under the hosted category.The IP PBX is capable of handling the voice signals through Internet Protocol (IP). PBX Phone System may be a soft PBX (through software systems) or hardware based device.
For home based or small offices (SOHO), self installation (over the professional installation) of the PBX Phone System setup may be tried by the users themselves, by following certain DIY step by step procedures. The PBX systems are designed to accommodate any upgradation of the features at some later stages. As in some systems, the PBX systems are also not without certain disadvantages; but they are minimal, especially when weighed over the benefits, enjoyed by the users of these systems.
There are four branches in the PBX phone system viz., the traditional PBX, Hosted/ Virtual PBX, IP PBX. The main advantage of the PBX systems is the savings in cost of making internal communications. But, with the growth of telephony technology, lots of capabilities and features are being added to cope up with the requirements of the users. To meet the growing demands of the public, there are many companies, offering many facilities in their products, to make them distinctly different from other similar competing products. Some of the common capabilities are auto dialing/ attendants, automatic call distributor/ ring back, Call blocking/ logging/ forwarding (when engaged or unattended)/ pick-up/ transfer/ waiting/ conferencing, customized abbreviated or speed dialing, DND, Follow-me or Find-me, IVR (Interactive Voice Response), CDR/ SMDR, etc., (though each company assigns a different nomenclature for the same facility).
There are many standard interfaces, for establishing connections among the extensions, trunk lines and PBX like DECT (for cordless phones), IP, Plain Old Telephone Service (POTS) or proprietary protocols as defined by the respective manufacturers DPNSS, ISDN, etc.
There are also hosted PBX systems in which all the features are provided by the service provider from the equipments installed at his location, remote from the users’ locations. There are also mobile PBX systems, which is classified under the hosted category.The IP PBX is capable of handling the voice signals through Internet Protocol (IP). PBX Phone System may be a soft PBX (through software systems) or hardware based device.
For home based or small offices (SOHO), self installation (over the professional installation) of the PBX Phone System setup may be tried by the users themselves, by following certain DIY step by step procedures. The PBX systems are designed to accommodate any upgradation of the features at some later stages. As in some systems, the PBX systems are also not without certain disadvantages; but they are minimal, especially when weighed over the benefits, enjoyed by the users of these systems.
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