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Siemens 30ISDN User Manual

Page 28

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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.