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Glossary
M
MCID (Malicious call identification)
See "Capture".
MSN
Multiple Subscriber Number. The phone numbers belonging to a multiple ISDN
connection. Each terminal is addressed separately, e.g., a separate number for a fax
machine. Three MSN's are included in the basic price of a standard and added-
feature connection. Up to ten MSN's can be assigned to one ISDN connection.
Multiple connection
ISDN connection which, unlike PABX connection, provides up to ten MSN's instead
of having a direct dialling number block. This is the preferred type of ISDN
connection for private customers.
Multiple subscriber number
See "MSN".
Music on hold
See "Waiting melody".
Mute
Convenience feature for telephones, which deactivates the built-in microphone (in
handset or handsfree unit).
N
Notebook function
During a phone call you can enter a phone number in the phone's temporary
memory to be dialled later.
NT/NTBA
Network terminating device (NT = Network Terminator and NTBA = Network
Terminator Basic Access). The public T-ISDN is terminated with an NT. The NT acts as
a bridge to the existing telephone outlet. Only the NT can or may be connected to
the telephone outlet. Under no circumstances should analogue terminals also be
connected to the phone outlet. ISDN terminals and additional ISDN outlets are
connected to the NT.
O
Open listening
At the touch of a key, all those present in a room can listen in to a phone call via an
integrated loudspeaker. See also "Handsfree talking".
Outgoing MSN, freely selectable
A performance feature which helps you to individually determine which MSN should
be used for the following call. This is not only important for the phone number
display on the called handset but also for billing charges. This is because call
charges, which can be broken down free of charge according to MSN on the network
provider invoice, are billed according to the MSN used to make the call.
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