Siemens optiPoint 410 Administrator's Manual page 85

Abbreviations and Specialized Terms Alphabetical Reference
Layer 3
rd
3 layer (Network Layer) of the 7-layer OSI model for describing the data
transmission interfaces.
LDAP
Abbreviation for "Lightweight Directory Access Protocol".
Simplified protocol for accessing standardized directory systems, e.g., a
company telephone directory.
LCD
Abbreviation for "Liquid Crystal Display".
Display of numbers, text or graphics with the help of liquid crystal technology.
LED
Abbreviation for "Light Emitting Diode".
Cold light illumination in different colours at low power consumption.
MAC
Abbreviation for "Medium Access Control Address".
A 48-bit address with the help of which a terminal device (e.g., Æ IP tele-
phone or Network card) identifies itself uniquely in a network all over the
world.
MIB
Abbreviation for "Management Information Base".
Database containing descriptions of error messages of the devices and
functions in a network.
PBX
Abbreviation for "Private Branch eXchange".
Private telephone system that connects the different internal devices to
the ISDN network
PING
Abbreviation for "Packet Internet Groper".
A program to test whether a connection can be made to a defined
Æ IP target. Data is sent to the target and returned from there during the
test. The result of the test displays the success / failure of the transmission
and possible additional information such as the transmission time.
Port
Ports are used in Æ IP networks to permit several communication connec-
tions simultaneously. Different services often have different port numbers.
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