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ISDN glossary
N
Notebook function
During a phone call you can enter a phone number in the phone's temporary mem-
ory to be dialled later.
NT/NTBA
Network terminating device (NT = Network Terminator and NTBA = Network Termi-
nator 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 con-
nected to the phone outlet. ISDN terminals and additional ISDN outlets are con-
nected 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 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.
P
Parking
A call is parked when you want to unplug the telephone during a call, or you want
to continue your call from another telephone with the same connection. The con-
nection is retained while it is parked.
Phonebook
An added feature on a phone allowing the name and phone number of several users
to be stored. The phone numbers can quickly be found and dialled.
PIN
Abbreviation for Personal Identification Number. Protects against unauthorised use,
e. g., system PIN, answering machine PIN, handset PIN.
Plugging to bus
TP, Terminal Portability. Also called parking. An incoming call can be held at the local
exchange for up to three minutes to then be accepted, for example, by another
phone, a fax machine or a PC. In the meanwhile the caller hears an appropriate
announcement.
Pre-dialling, see also "Block dialling"
For some telephones with a display you can enter the phone number first, and check
it once more before dialling.
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