Convenient and secure telephone communication
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kap01.fm5
27.11.98 Profiset 30isdn engl.: A30853-X300-B107-1-7619
DTMF signalling
When a connection is set up, you can use the keypad to
transmit DTMF signals (tones in dual-tone multifrequency),
e.g. to control an answering machine remotely.
Keypad signalling
Instead of DTMF signalling, you can transmit keypad infor-
mation elements (IE) e.g. to activate features on PBXs or
certain ISDN services in several countries (➔page 33:
Signalling methods to control the ISDN services).
Since DTMF signalling is set by default for your telephone,
it must first be deactivated.
dA call is in progress.
TEnter the control digits.
The digits entered appear on the display for several
seconds and the transmitted signals can be heard via
handset or loudspeaker.
dA call is in progress.
S*S Press the Programming key, the Asterisk key and again
the Programming key.
Keypad signalling is activated for the current call. The key-
pad digits entered appear on the display preceded by the
symbol ”_ “.
Press the Programming key, the Asterisk key and the Pro-
gramming key again to return to DTMF signalling.
bReplace the handset to reactivate DTMF signalling.