jotron TR-910, Руководство оператора и инструкция по установке, Страница: 9 / 48

ppm Parts Per Million
PTT Push-to-Talk
RCMS Remote Control and Management System, usually an IP-based network to monitor
and control radios and accessories (=RACS).
RF Radio Frequency
RSSI Received Signal Strength Indicator is a measurement of the power present or level
of a received radio signal.
Rx Receiver, Recep on
RTP Real- me Transport Protocol. Used for Voice Over IP (VoIP).
SDR So ware-De fi ned Radio is a system where components that tradi onally have been
implemented in hardware (e.g. mixers, fi lters, ampli fi ers, modulators/demodulators,
detectors, etc.) now are implemented by means of so ware on an embedded
compu ng devices, i.e. a Digital Signal Processor (DSP).
SIP Session Ini a on Protocol is an IETF-de fi ned signaling protocol, widely used for
controlling mul media communica on sessions such as voice and video calls over
the Internet Protocol (IP). The protocol can be used for crea ng, modifying and
termina ng two-party (unicast) or mul party (mul cast) communica on sessions
consis ng of one or several media streams.
S/N Signal-to-Noise Ra o
SNMP Simple Network Management Protocol is a UDP-based network protocol. It is used
mostly in network management systems to monitor and control network connected
devices like the Jotron radios. SNMP is a component of the Internet Protocol
Suite as de
fi ned by the Internet Engineering Task Force (IETF). It consists of a set
of standards for network management, including an applica on layer protocol, a
database schema, and a set of data objects.
SQ Squelch
SW So ware
TCP Transmission Control Protocol
TCXO Temperature Compensated Crystal Oscillator.
TRx Transceiver
Tx Transmi er, transmission
UDP User Datagram Protocol
VCO Voltage-controlled Oscillator
VHF Very High Frequency (VHF is de fi ned by the band 30-300 MHz). In the content of this
book, it refers to the interna onal communica on band for air tra ffi c control (118-
137 MHz)
VOGAD Voice Operated Gain-Adjus ng Device is a type of automa c gain control for
microphone/TX line ampli
fi ca on. It is used in radio transmi ers to ensure correct
modula on and to prevent clipping caused by overmodula on.
VoIP Voice over IP (VoIP) is a general term for a family of transmission technologies for
delivery of voice communica ons over IP networks such as the intranet/Internet or
other packet-switched networks.
VSWR Voltage Standing Wave Ra o
Doc. No.: 103614 TR-910 Operator Rev. AB
jotron.com
9