How does EPBX differ from PBX ?

EPBX (Electronic private branch exchange) are Phone systems, which traditionally run on proprietary special purpose computers, can run on ordinary servers and workstations, allowing telephones to work just like any other computer application. It is used in communication system. This is a mini exchange in which you can input 2/3/4/more telephone lines and can take out so many outputs. This feature depends upon the model that you choose. Which is used by many organizations to transfer more than two or three lines to various extensions. Primarily it’s a business telephone system, it is related to call handling. Business telephone systems are often called as private branch exchanges. It provides facility of internal phone line, voice mail facility, call barge-in, call recordings facility, Intelligent routing facility.

1. Electronic Private branch exchange.
2. This works on analog technology, Even modern EPBX which claim to be digital are working on analog technology only, THEY DON'T WORK IN ONES AND ZEROES.
3. This is generally present in all small / big offices.
4. Telephone lines from telephone exchange are connected to this EPBX
5. And all the extensions of office (our users) are also connected to this EPBX.
6. Primary usage is that users can call each other and small no. Of telephone lines can be used by many users. (extensions)

PBX?

Short for private branch exchange, a private telephone network used within an enterprise. Users of the PBX share a certain number of outside lines for making telephone calls external to the PBX. Most medium-sized and larger companies use a PBX because it's much less expensive than connecting an external telephone line to every telephone in the organization. PBX systems can be bare bones or feature-rich, depending on what the customer is willing to pay. In addition, it's easier to call someone within a PBX because the number you need to dial is typically just 3 or 4 digits. A new variation on the PBX theme is the Centrex, which is a PBX with all switching occurring at a local telephone office instead of at the company's premises. Voice mail, call forwarding, conferencing, inter coming, and transferring are just some of the options available.


It consists mainly of several branches of telephone systems and it switches connections to and from them, thereby linking phone lines. Companies use a PBX for connecting all their internal phones to an external line. This way, they can lease only one line and have many people using it, with each one having a phone at the desk with different number.  It also provides other services like voice mail, call forwarding, caller ID and so on. For this service the phone company receives a monthly fee. The number is not in the same format as a phone number though, as it depends on the internal numbering. Inside a PBX, you only need to dial three-digit or four-digit numbers to make a call to another phone in the network. We often refer to this number as an extension. A PBX essentially takes the place of the phone company's Central Office within the company by acting as the exchange point, routing calls. With a PBX in place, each phone only needs an extension, not a phone number, and the PBX handles all calls made from desk-to-desk within the company. When an outside call is required, an access number is dialed first, usually a "9" (in the United States). The PBX then transfers the call to the phone company's Central Office. From there the call is routed normally.