Siemens 70isdn - Manual (Page 107)

ISDN glossary
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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.