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Section 11
Glossary
96
HW
Hardware
I/O
Input/output
IAB
Internet Architecture Board
ICMP
Internet Control Message Protocol
IEC
International Electrotechnical Commission
IEC 60870-5-101 Companion standard for basic telecontrol tasks
IEC 60870-5-104 Network access for IEC 60870-5-101
IEC 60870-5-4
IEEE
Institute of Electrical and Electronics Engineers, Inc.
IP
Internet protocol
IP address
A set of four numbers between 0 and 255, separated by
periods. Each server connected to the Internet is
assigned a unique IP address that specifies the location
for the TCP/IP protocol.
LAN
Local area network
LED
Light-emitting diode
MAC
Media access control
MRU
Maximum Receive Unit
MTU
Maximum Transfer Unit
NC
Normally closed
NTP
Network time protocol
PC
1. Personal computer
2. Polycarbonate
PIN
Personal Identification Number
PPP
Point-to-point protocol
RF
Radio frequency
RFC 2200
Internet Standard which describes the state of
standardization of protocols used in the Internet as
determined by the Internet Architecture Board
RI
Ring Indicator
RISC
Reduced Instruction Set Computer
RJ-45
Galvanic connector type
RoHS
Restriction of the use of certain hazardous substances
in electrical and electronic equipment
RS-232
Serial interface standard
RS-422
Serial communication standard (EIA–422)
1MRS757105 B
RER601/603
Technical Manual
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