PSTN Public Switched Telephone Network
PSTN Gateway A device that provides connectivity from a TETRA user to a PSTN subscriber and the other way
around. Additionally, for the duration of the call, the PSTN gateway allows TETRA signaling information to be passed from
TETRA Switching and Management Infrastructure to the external network user and from the external network user to the
TETRA SwMI in accordance with the TETRA Call Control (CC) procedures.
See also: Public Switched Telephone Network, Switching and Management Infrastructure
PTPC Point-to-Point Call
See also: Private Call
PTT Button Push-to-Talk button
Public Switched Telephone Network (PSTN) Traditional telephone network.
Push-to-Talk Pressing this button on a radio allows the subscriber to transmit.
Radio A two-way communication device used for voice and data.
Radio User Assignment/Radio User Identity (RUA/RUI) This feature allows to assign alphanumeric
user names to radio users, and to authenticate the radio users in a logon process.
Radio User Assignment (RUA) Part of RUA/RUI feature.
See also: Radio User Assignment/Radio User Identity
Radio User Identity (RUI) Part of RUA/RUI feature
See also: Radio User Assignment/Radio User Identity
RCU Remote Control Unit
Remote Control Unit (RCU) A small device attached to a covert radio over a thin wire, used for operating the
radio.
Remote flashing Programming the transceiver via the control head.
RSM Remote Speaker Microphone
RSSI Radio Signal Strength Indicator
RUA Radio User Assignment
RUA/RUI Radio User Assignment/Radio User Identity
RUI Radio User Identity
SCK Static Cipher Key
SDMO KAG Secure Direct Mode Operation Key Association Group
SDS Short Data Service
Selling Feature Requires a USB dongle with purchased licenses.
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