Glossary

LED

Light Emitting Diode. Cold light illumination in different colours at low power consumption.

M

MAC Address

Media Access Control address. Unique 48-bit identifier attached to network adapters.

MDI-X

Media Dependent Interface crossover (X). The send and receive pins are inverted. This MDI allows the connection of two endpoints without using a crossover cable. When Auto MDI-X is available, the MDI can switch between regular MDI and MDI-X automatically, de- pending on the connected device.

MIB

Management Information Base. A type of database used to manage the devices in a com- munications network.

MWI

Message Waiting Indicator. A signal, typically a LED, to notify the user that new mailbox messages have arrived.

P

PBX

Private Branch Exchange. Private telephone system that connects the internal devices to each other and to the ISDN network.

PCM

Pulse Code Modulation. A digital representation of an analog signal, e. g. audio data, which consists of quantized samples taken in regular time intervals.

PING

Packet Internet Gro(u)per. A program to test whether a connection can be made to a de- fined IP target. Data is sent to the target and returned from there during the test.

PoE

Power over Ethernet. The IEEE 802.3af standard specifies how to supply power to compli- ant devices over Ethernet cabling (10/100Base-T).

Port

Ports are used in ->IP networks to permit several communication connections simulta- neously. Different services often have different port numbers.

PSTN

Public Switched Telephone Network. The network of the world's public circuit-switched telephone networks.

X-4

A31003-O1010-M100-9-76A9, 05/05/2008

HiPath 8000 - OpenStage Family, Administration Manual

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Siemens 80, 60, 40, 20 manual MAC Address, PoE, Port