Siemens 70isdn operating instructions Isdn glossary

20.5.99 kap13.fm5 Profiset 70isdn, GB: A30853-X300-B501-3-7619

ISDN glossary

Dual-tone multifre- A signalling method whereby the information is transmitted to the quency (DTMF) switching centre in the form of tones with various frequencies.

Euro ISDN Uniform European ISDN standard introduced at the end of 1993, which will completely replace the national ISDN protocols in the year 2000.

Hold The "call hold" feature. The non-communicating state of the user put on hold in the course of a consultation or toggle action.

Hunt group A number of terminals can be accessed under one directory number or are switched together to one connection. A number of basic rate accesses can also be switched together to one connection.

IAE Telecommunications connector. Denotes a standardised connecting box for analog terminals on the analog telecommunications network.

ISDN Abbreviation for Integrated Services Digital Network. Service-inte- grating digital telecommunications network which integrates tele- communications services such as telephone, telefax, data and image transmission in a network.

LED Light emitting diode. An LED which flashes or lights up to indicate the status ON of a device or key.

MSN Abbreviation for Multiple Subscriber Numbers; a multiple subscriber number of the ISDN basic rate access in a multi-device connection.

Multi-deviceA connection whereby a number of terminals can be operated simul- connection taneously on an S0 bus in point-to-multipoint operation.

Multiple subscriber Assigned by Deutsche Telecom for an ISDN basic rate access with number (MSN) multi-device connection. Multiple subscriber numbers are used for di-

rect inward dialing to the terminal but, unlike the direct inward dialing number, are completely independent of each other.

NTBA Abbreviation for Network Termination for Basic Access. Network ter- mination of an ISDN basic rate access which is installed by or can be obtained from Deutsche Telekom.

NTPM Abbreviation for Network Termination for Primary Rate Access. Termi- nation device of an ISDN primary rate access installed by Deutsche Telekom.

Point-to-multipointAn ISDN multi-device connection whereby a number of ISDN termi- operation nals can be operated on an S0 bus.

Point-to-pointAn example of point-to-point operation is the primary rate access. In operation this case, only one terminal can be operated on the connection. For this reason, it is also called a system connection. In most cases, the

system connected is an ISDN PBX.

Premium rate access Premium service package for ISDN features (based on the standard rate access).

Primary rate access ISDN connection equipped with 30 B channels each offering

64 kBit/s. Primary rate access (system connection) is only available in connection with a standard rate or premium rate access.

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