Technical data

156 Theoretical and general applications www.westermo.com
Ring network A series connected network where all units are connected in a
closed ring and all communications pass through all units.
RJ-45 8-pos. modular connector according to ISO standard 8877.
RLP Radio Link Protocol. Error correction protocol used in GSM.
RMON Remote Monitoring. Is a standard MIB that provides diagnostic
data for networks.
Roaming Possibility to use GSM equipment on several different
operators’ network.
Router A Router is a device (normally a PC) that is connected to at least
two networks and determines the next network point that a
packet should be sent to.Typically, a packet may be sent via a
number of routers before arriving at the correct destination.
More complex routers have look-up tables that enable them to
determine the quickest or most cost effective route to send the
packet.
RS-232 American standard, serial communication.
Segment Delimited part of a network.
Serial transfer Signifies that data characters are sent one by one on a single line,
unlike parallel transfer.
Short-haul Modulates the signal and adapts it for different cables and inter-
modems faces. The modem gives secure transfer over long distances. A
short-range modem or local modem is used in local data com-
munications.
Short-range Modulates the signal and adapts it for different cables and
modem interfaces.The modem gives secure transfer over long distances.
A short-range modem or local modem is used in local data
communications.
Simplex One way communication.
Singlemode Technology for the transfer of optical signals in fibre cable.
Singlemode is usually used in laser transfer in very thin fibre cores.
Slave Device that is polled in a polled system.
SMS Short Message Service, a service to send/receive short text mes-
sages via the GSM network.
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