Siemens HiPath 2000 Administration Manual page 98

Alphabetical Reference
LED
Abbreviation for "Light Emitting Diode".
Cold light illumination in different colors 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.
telephone or network card) identifies itself uniquely in a network
worldwide.
MIB
Abbreviation for "Management Information Base".
Database containing descriptions and 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
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
possibly additional information such as the transmission time.
Port
Ports are used in
connections simultaneously. Different services often have different port
numbers.
PSS
Abbreviation for "Pre Shared Secret".
The PSS key is the master key used for data encryption in VoIP .
QoS
Abbreviation for "Quality of Service".
Describes the subjectively ascertainable quality (service quality) of a voice
connection through
packet delay, delay deviation, reserved bandwidth, type and bit rate
(variable, constant or unspecified).
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IP networks to permit several communication
IP networks. Properties of QoS are packet loss rate,
IP
IP