Write a note on EPABX

An electronic private automatic branch exchange or EPABX
is used by most businesses. These are systems which provide connectivity between members
of the same organization as well as to entities outside the
organization.

In the absence of an EPABX, each member of an
organization required a separate telephone number given by a telephone services
provider. This made internal communication expensive as the telephone service provider's
network had to be used. With an EPABX, internal numbers are routed through the system
and do not need the telephone service provider's infrastructure. Numbers are also
shorter, making them easier to remember and dial.

The EPABX
also has several external connections that allow communication outside the organization.
The EPABX can automatically link the external caller to the appropriate internal number.
Modern EPABX provide many additional services like call waiting, conference calls, call
metering, welcome calls, etc.

It has proved to be a very
valuable tool in providing inexpensive communication options within organizations as
well as improved communication options outside the organization.