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Meridian Digital Telephone IP Adapter Installation and Administration Guide 209
October 2001 Glossary
position ID
A unique identifier for a phoneset, used by the switch to route calls to the
phoneset.
POST
See power-on self-test.
power-on self-test
Initializes and performs rudimentary tests on baseboard hardware, including
CPU, floating point unit, interrupts, memory, real-time clock, video, and
auto-initializing PCI and EISA bus.
private branch exchange
A telephone switch, typically used by a business to service its internal telephone
needs. A PBX usually offers more advanced features than are generally
available on the public network. Users of the PBX share a certain number of
outside lines for placing telephone calls external to the PBX.
protocol
A standard format used for communication between two devices. The protocol
determines the type of error checking to be used, the data compression method
(if any), how the sending device will indicate that it has finished sending a
message, and how the receiving device will indicate that it has received a
message.
PSTN
See public switched telephone network.
public switched telephone network
Any common carrier network that provides circuit switching between public
users. The term is usually applied to the public telephone network.