150 TB9400/TN9275 Installation and Operation
© Tait International Limited May 2023
host name
The unique name by which a network element is known on the network. 
I
2
C A bi-directional two-wire serial bus which is used to connect integrated 
circuits (ICs). I
2
C is a multi-master bus, which means that multiple chips 
can be connected to the same bus, and each one can act as a master by 
initiating a data transfer. Used in the TB9400 for communications between 
reciter 1 and the PMU.
IP Internet Protocol is a protocol for sending data packets between hosts.
isolator A passive two-port device which transmits power in one direction, and 
absorbs power in the other direction. It is used in a PA to prevent damage 
to the RF circuitry from high reverse power.
LAN Local Area Network. A computer network that interconnects computers in 
a limited area, such as a single building or group of buildings.
LED Light Emitting Diode. Also the screen representation of a physical LED.
licence Some operational functions of the base station are controlled by licences. 
Purchasing a licence from Tait allows you to enable the feature set which 
includes the required functionality.
logical channel One of the two timeslots provided in each TB9400 radio frequency. Each 
timeslot can function as a separate logical channel, independent of the other 
timeslot. One radio frequency can therefore carry two separate voice or 
data streams, one in each timeslot.
LSM Linear Simulcast Modulation is a proprietary modulation scheme designed 
to give optimal performance in simulcast systems, compared to that 
obtainable using C4FM.
marshaling 
duration
The length of time that the voice stream needs to travel from the central 
voter to the furthest channel group member. The fixed marshaling duration 
parameter includes the time needed to fill the transmit buffer to the required 
level.
master The channel group master is the member with the control connection to the 
trunking site controller.
monitor The Monitor function unmutes the receiver, so that the user can hear all 
traffic on a channel.
multicast group The group of hosts associated with a specific IP multicast address.