Tait TB9300, Installation And Operation Manual, Page: 131 / 138

TB9300 Installation and Operation Manual
Glossary 131
© Tait Limited March 2016
TDMA
Time Division Multiple Access. In the TB9300 each radio frequency
provides two timeslots, with each timeslot representing one logical
channel.
TELCO
Telephone company.
TIA
Telecommunications Industry Association
toggle
Describes the switching between two states. If something is on, toggling it
turns it off. If it is off, toggling it turns it on.
tone
A sound wave of a particular frequency.
Tx
Transmitter.
UDP
User Datagram Protocol. A simple protocol on top of IP for sending
streams of data.
uplink
The transmission path from mobile stations to fixed equipment.
UTC
Coordinated Universal Time (word order from French). An international
time standard that has replaced Greenwich Mean Time.
valid signal
A signal that the receiver unmutes to. A signal is valid, for example, when
it is strong enough to be decoded and when it has the specified NAC.
VDP
Voice Data Protocol. A proprietary protocol operating over IP for the
exchange of voice and data between a base station and a trunking node
controller.
voice stream
A digitized voice signal that passes through the main switch.
VoIP
Voice over IP. The name for the technology that puts speech signals in
packets and then routes them over an IP backbone network.
VPN
Virtual Private Network. A private communications network used to
communicate confidentially over a non-private network.
VSWR
Voltage Standing Wave Ratio is the ratio of the maximum peak voltage
anywhere on the transmission line to the minimum value anywhere on the
transmission line. A perfectly matched line has a VSWR of 1:1. A high
ratio indicates that the antenna subsystem is poorly matched.