Answer Posted / rafi
Hi,
Private branch exchange is nothing but communication
between the switch board and associated equipment
A telephone exchange serving a single organization, having
a switchboard and associated equipment, usually located on
the customer's premises; provides for switching calls
between any two extensions served by the exchange or
between any extension and the national telephone system via
a trunk to a central office.
Mainly used for telecom testing
Correct me if iam wrong Rafi CTS 9841733045
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