20.5.99 | kap09.fm5 | Profiset 70isdn, GB: |
Convenient and secure telephone communication
DTMF signals: off
Reactivate DTMF signalling
Press the illuminated feature key "DTMF signals: off".
Distinction between DTMF and keypad signalling
The following table illustrates the difference in the signals produced when the keys on the keypad are pressed in DTMF signalling mode (➔ page 61) and keypad signalling mode (➔ page 61). The table takes into account the vari- ous system configurations which support Profiset 70isdn operation.
Type of signalling with | Keys transmit: | DTMF/keypad number |
system configuration: |
| feature keys: |
|
|
|
DTMF signalling with | DTMF signals | Character string in DTMF |
main station |
|
|
|
|
|
Keypad signalling with | Keypad information | Character string as keypad |
main station | element (IE) | information elements (IE) |
|
|
|
DTMF signalling with | DTMF signals | Character string as keypad |
CENTREX |
| information elements (IE) |
|
|
|
Keypad signalling with | Keypad information | Character string as keypad |
CENTREX | element (IE) | information elements (IE) |
|
|
|
DTMF signalling with | DTMF signals plus called | Character string as DTMF |
S0 extension* | party number (IE) | signals plus called party |
|
| number (IE) |
Keypad signalling with | Called party number (IE) only | Character string as called |
S0 extension* |
| party number only |
DTMF signalling with | DTMF signals | Character string in DTMF |
|
| |
|
|
|
Keypad information | Character string as keypad | |
element (IE) | information elements (IE) | |
|
|
|
*"S0 extension" refers to Siemens 8818/A6 systems and the Octopus systems available from Deutsche Telekom AG.
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