16 Description TB7300 Installation and Operation Manual
© Tait International Limited December 2022
■ Encryption and decryption are performed in the hardware. You need
reciter hardware version 6.01 to use encryption.
■ The Tait Key Fill Device (KFD) can create and export keystore files.
The technician can upload a keystore file containing the encryption key
for encrypted operation. The KFD users guide (MNE-00010-xx) has
more detail.
■ The gateway can store an active key and an inactive key to allow for key
change-over
For a complete introduction to key management refer to the KMF Key
Management Manual (MBA-00048-xx).
The base station WebUI help also provides more detailed information.
1.4.3 DMR/MPT
The TB7300 is designed for operation in a Tait TN9300 DMR conventional
radio network, a Tait TN9300 DMR trunked radio network, an MPT
network, or as an analog conventional repeater.
In a DMR conventional network, the TB7300 can operate as a stand-alone
repeater, or as a member of a multi-site system (under the supervision of a
DMR conventional channel controller). Since DMR provides two logical
channels (timeslots) simultaneously for each radio frequency (physical
channel), two users can alternately access the same frequency, one in each
timeslot. Base stations on different sites can be linked together to form
channel groups. A base station can support two channel groups, one in each
timeslot.
In a DMR/MPT trunked network the TB7300 can operate as a control
channel or as a traffic channel. With two logical channels for each radio
frequency, a single TB7300 base station can provide two traffic channels,
two control channels, or both a traffic channel and a control channel.
In an MPT network, the TB7300 operates as a control channel or as a traffic
channel.
The TB7300 operates with a trunking node, or in fallback
operation it can operate in either trunked or conventional mode.
In analog operation it can operate as a conventional repeater with CTCSS
subaudible signaling and DCS subaudible signaling.
For more information, refer to the DMR/MPT/MPT-IP System Manuals.
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