Tait TB9300, Инструкция по установке и эксплуатации, Страница: 128 / 138

128 Glossary
TB9300 Installation and Operation Manual
© Tait Limited March 2016
the network it serves, and works by rewriting IP addresses and port
numbers in IP headers on the fly so the packets all appear to be coming
from (or going to) the single public IP address of the NAT device instead
of the actual source or destination.
network element
Any device that is network-connected. A TaitNet digital network consists
of a number of network elements. The TB9300 base station is a network
element designed and manufactured by Tait.
NTP
Network Time Protocol is a protocol and software implementation for
synchronizing the clocks of computer systems across a network. An NTP
server obtains the correct time from a time source and sets the local time in
each connected computer.
octet
A set of 8 bits.
Offline mode
A mode of operation in which active service is suspended so that special
operations can be carried out, such as programming in a new configuration
or carrying out certain diagnostic tests.
Online mode
The normal operating mode of the base station.
outbound
Describes the direction of a signal: from a fixed station over the air
interface to an MS.
over
A single transmission, which begins when a user presses PTT and ends
when the user stops pressing.
PA
The Power Amplifier is a base station module that boosts the exciter output
to the required transmit level.
PCB
Printed Circuit Board.
PMU
The Power Management Unit is a module in the base station that provides
power to the subrack and monitors power conditions.
privileges
A set of access rights to the web interface functions. There are
Administrator, Maintainer and Monitor privileges.
PSTN
Public Switched Telephone Network: the public telephone network.
PTT
Push To Talk. The button on an MS that keys the transmitter.