ISDN glossary
86
KAP14.FM5
Pronto 32i, englisch: A30853-X300-F507-1-7619
20.5.99
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.
NT
Abbreviation for
N
etwork
T
ermination for
B
asic
A
ccess. Network ter-
mination of an ISDN basic rate access which is installed by or can be
obtained from Deutsche Telecom.
point-to-multipoint op-
eration
An ISDN multi-device connection whereby a number of ISDN termi-
nals can be operated on an S
0
bus.
S
0
bus
A line used from the network termination in the multi-device connec-
tion. Up to 12 connecting boxes and up to 8 ISDN terminals can be
connected to an S
0
bus; of these, however, only 4 ISDN terminals can
be connected simultaneously without separate power supply.
service indicator
A feature of ISDN. The service indicator, which is sent with every
ISDN connection, indicates the type of connection required. If the
service indicator of the calling terminal does not correspond to that of
the called terminal, the connection is not established.
system connection
A particular type of ISDN connection. In the Euro ISDN, either the ba-
sic rate access or the primary rate access can be used for a system
connection. The system connection is a point-to-point connection.
three-party conference
In a three-party conference, a user is simultaneously connected to
two other parties, whereby all three parties can speak to each other.
toggle
A special type of consultation whereby the two parties can be spoken
to alternately without interrupting the telephone connection.
western jack
General term for connectors with 4 or 6 contacts with analog termi-
nals and 8 contacts with ISDN terminals (RJ45).
