Glossary
222
N
NAT Network Address Translation, handles the conversion of the
public WAN IP to 253 private LAN IPs.
P
PAST Person Activated Self Test
PBX Private branch exchange, a telephone exchange that serves a
particular business or office.
P-Channel A channel which provides a unidirectional dedicated
communications channel from a GES to all aircraft. Data
packets are broadcast over this channel and addressed to a
specific aircraft.
PIN Personal Identification Number
POR Pacific Ocean Region (Satellite coverage)
POST Power On Self Test
POTS Plain Old Telephony System. Traditional 2-wire system.
PS Packet-Switched. Packet-switched networks move data in
separate, small blocks (packets) based on the destination
address in each packet.
R
RDI Restricted Digital Information
RTCA Radio Technical Commission for Aeronautics
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