96 Glossary TB7300 Installation and Operation Manual
© Tait International Limited December 2022
TDMA
Time Division Multiple Access. In the TB7300 each radio frequency
provides two timeslots, with each timeslot representing one logical
channel.
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.
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.
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.
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