ISDN Glossary
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Internal calls
These are connections free of charge between the base station telephone and handsets.
Internal ringer
Special signal tone on telephone systems to discriminate between internal and external calls.
ISDN
Abbreviation for Integrated Services Digital Network. Integration can cover telephone, fax and data transfer for example.
ISDN abbreviations
CW | Call waiting |
CF | Call forwarding |
3PTY | |
CCBS | Callback on busy |
CD | Call deflection |
Keypad
The keypad supports special function keys such as the star key (*) and the hash key (#). These can be used with the appropriate codes to access various functions offered by your provider (such as #4711*).
Lock function/PIN
A code protects your telephone against unauthorised use. By entering
MCID (Malicious call identification)
See Trace.
MSN
Multiple Subscriber Number. The call numbers of an ISDN multiple device connection. They are used to address specific terminals; the fax machine, for example, may have a separate number. Three MSNs are included in the basic price of the standard line and the enhanced line. Up to ten MSNs can be assigned to an ISDN line.
Multiple subscriber number
See MSN.
Multiple device connection
ISDN line which, in contrast to a system connection, provides up to ten MSNs instead of one extension number block. This is the most usual type of ISDN line for private customers.
Music on Hold
Music on hold. Music is played to the waiting caller during a consultation call or call transfer.
Mute
Enhanced feature on telephones; deactivates the
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