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Appendix
External line seizure
Depending on the configuration, an external line can be seized automatically or by
dialling 0. This means that when you want to make an external call and you lift the
handset, you hear an external dialling tone either immediately or after dialling 0.
IAE/UAE
This is a unit consisting of the standardised socket and plug for connecting ISDN
devices in Deutsche Telekom’s ISDN.
ISDN
ISDN stands for “Integrated Services Digital Network.”
ISDN socket
The standardised socket for connecting ISDN devices in Deutsche Telekom’s ISDN.
LED
Light emitting diode: an electronic component for visual signalling.
MCID (Malicious Call Identification)
An ISDN feature enabling malicious callers to be identified in the telephone
exchange.
ML PPP
Multilink point-to-point protocol, which bundles two B-channels to achieve a higher
transfer rate.
MSN
Multiple subscriber number: an external ISDN telephone number. Up to 10 multiple
subscriber numbers can be assigned to a multi-terminal basic ISDN connection.
These numbers enable the connected devices to be addressed (i.e. called, faxed,
etc.) individually.
Multi-terminal connection
You can operate up to three terminals without power supplies and five additional ter-
minals with their own power supplies on a multi-terminal connection. You can install a
total of 12 ISDN ports, using the free ports to plug in your ISDN terminals at different
locations.
MWI
Message waiting indication. There is a voice or fax message waiting in your T-NetBox.
NTBA
Network Termination Basic Access. This is the network terminator, a small box that
converts a 2-wire line to an internal 4-wire line to the S0 port.