Installation Instructions

PRELIMINARY
Glossary 69
Revision 0.1, month 2003
Alphabetic List of Terms and Abbreviations
mobile station
N
NAT
Network address translation. A system for converting the IP numbers used on one
network to the IP numbers used in another network. Usually one network is the
inside network and one network is the outside network. Usually the IP numbers on
the inside network form a relatively large set of IP numbers, which must be
compressed into a small set of IP numbers on the outside network.
O
P
PSTN
Public Switched Telephone Network. The usual way of making telephone calls in the
late 20th century, designed around the idea of using wires and switches. Perhaps to
be supplanted by VoIP in the 21st century.
Q
QoS
Quality of Service. A set of technologies for managing and allocating Internet band-
width, often used to ensure timely delivery of multmedia traffic.
R
RADIUS
Remote Authentication Dial-In User Service. A service that authorizes connecting
users and allows them access to requested systems or services. The Microsoft ISA
server is a RADIUS server.
S
SIP
Session Initiation Procotol. SIP is a protocol for finding users, usually human, and
setting up multimedia communication among them, typically a VoIP phone call.
ssh
Secure SHell. A terminal-emulation program that allows users to log onto a remote
device and execute commands. It encrypts the traffic between the client and the host.
subcontroller
T
U
UTC
Abbreviation for Coordinated Universal Time (as defined by the International Tele-
communication Union (ITU). Also known as Greenwich Mean Time. The time is not
adjusted for time zones or for daylight savings time.