Dtmf Signalling; Keypad Signalling - Siemens A30853 Operating Instructions Manual

27.11.98
Convenient and secure telephone communication

DTMF signalling

Keypad signalling

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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.
d
A call is in progress.
T Enter the control digits.
The digits entered appear on the display for several
seconds and the transmitted signals can be heard via
handset or loudspeaker.
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 (
Signalling methods to control the ISDN services).
Since DTMF signalling is set by default for your telephone,
it must first be deactivated.
d
A 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.
b
Replace the handset to reactivate DTMF signalling.
Profiset 30isdn engl.: A30853-X300-B107-1-7619
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