Tait TB9100, Инструкция по установке и эксплуатации

Страница: 137 / 144

TB9100 Installation and Operation Manual
Glossary137
© Tait Electronics Limited May 2006
G
G. 711
The name of the ITU standard that defines how speech is
digitally encoded (64 kbit, A-law or u-law). When the base
station is in analog mode, G. 711 speech is sent and received on
the digital line interface.
gating
Gating is the process of opening and closing the receiver gate.
When a valid signal is received, the receiver gate opens.
group call
A group call is a call that involves more than two radios
simultaneously.
H
hiccup mode
Many power supplies switch off in the event of a short-circuit
and try to start again after a short time (usually after a few
seconds). This “hiccup”-type of switching off and on is repeated
until the problem is eliminated.
hub
A unit for connecting hosts together. It sends all incoming
ethernet packets to all the other hosts.
hysteresis
Hysteresis is the difference between the upper and lower trigger
points. For example, the receiver unmutes when the upper
trigger point is reached, but will mute again until the level falls
to the lower trigger point. An adequate hysteresis prevents the
receiver gate from repeatedly muting and unmuting when the
level varies around the trigger point.
I
IMBE
Improved Multiband Excitation. A voice compression
technology patented by Digital Voice Systems, Inc and used in
the vocoders of P25 radios.
inbound
Inbound describes the direction of a signal: from a subscriber unit
over the air interface to the fixed station.
inhibit
A control command that can be sent across the CAI to inhibit a
radio. An inhibited radio appears to the user as if it is powered
off.