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Appendix
125
Single person
operation
Busy-on-busy
Mode for operating the telephone system in which incoming external calls
receive a busy tone as soon as an extension is occupied.
Terminal
General term for a device connected to the telephone system. This can be a
telephone, fax machine, modem, PC card, etc.
Hold
Connection state whereby there is no voice connection. Required for features
such as Inquiry call.
http
Hypertext Mark-up Transport Protocol. Describes the method by which WWW
pages are transmitted over the network.
Internal traffic
Communication connection between two telephone system subscribers.
Internal connections are toll-free.
IP
Internet Protocol (TCP/IP = Transmission on Control Protocol/Internet
Protocol) for Internet data communication.
IP address
IP stands for „Internet Protocol”. An IP address contains four numbers
separated by dots and is used to identify an individual, distinct host computer
in the Internet. Example: 192.34.45.8.
ISDN
ISDN stands for „Integrated Services Digital Network”.
Keypad
Dialling process using special features in the network operator’s exchange.
Conference
Interconnection of a maximum of three subscribers to conduct a conference.
LAN
Local Area Network. Local network between computers for exchanging data or
joint use of drives or printers.
LCR
Least Cost Routing. Automatic selection of the network operator offering the
cheapest rate.
LED
Light-emitting diodes or indicator lights making it possible to monitor the
status of the system or individual terminals.
MAC address
Is saved firmly on the card and is distinct across the world. It is a unique serial
number for a network card.
Switching between
lines
Changing between two calls using the key. The subscriber on hold hears a
hold tone or music.
Mbps
Megabits per second. Measuring unit for data transfer rate (bandwidth) e.g. in
networks.