Specifications

84 MDS Orbit MCR-4G Technical Manual MDS 05-6628A01, Rev. A
PLC (Programmable Logic Controller): A dedicated microprocessor configured for a specific applica-
tion with discrete inputs and outputs. It can serve as a host or as an RTU.
PPM: Parts per Million
Programmable Logic Controller: See PLC.
Remote Terminal Unit: See RTU.
RTS: Request-to-send
RTU: Remote Terminal Unit. A data collection device installed at a Remote unit site.
RX: Abbreviation for “Receive.”
Signal-to-Noise Ratio: See SNR.
SCADA (Supervisory Control And Data Acquisition): An overall term for the functions commonly pro-
vided through an MAS radio system.
SCEP: Simple Certificate Enrollment Protocol. A scalable protocol for networks based on digital certifi-
cates, which can be requested by users without the need for assistance or manual intervention from a system
administrator.
SNR (Signal-to-Noise ratio): A measure of how well the signal is being received at a radio relative to noise
on the channel.
SSH: Secure Shell protocol for a network that allows users to open a window on a local PC and connect to
a remote PC as if they were present at the remote.
SSID (Service Set Identifier): A name that identifies a particular 802.11wireless LAN.
Supervisory Control And Data Acquisition: See SCADA.
Telnet: A terminal emulation protocol that enables an Internet user to communicate with a Remote device
for management activities as if it were locally connected to a PC.
TX: Abbreviation for “Transmit.”
WAN: Wide Area Network