Siemens A30853 - Manual (Page 28)

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.
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.
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.