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Siemens 70isdn User Manual

Page 107

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ISDN glossary

95

kap13.fm5

Profiset 70isdn, GB: A30853-X300-B501-3-7619

20.5.99

Dual-tone multifre-

quency (DTMF)

A signalling method whereby the information is transmitted to the

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-device

connection

A connection whereby a number of terminals can be operated simul-

taneously on an S

0

bus in point-to-multipoint operation.

Multiple subscriber

number (MSN)

Assigned by Deutsche Telecom for an ISDN basic rate access with

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-multipoint

operation

An ISDN multi-device connection whereby a number of ISDN termi-

nals can be operated on an S

0

bus.

Point-to-point

operation

An example of point-to-point operation is the primary rate access. In

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.