Siemens 300 H - Manual (Page 23)

Setting up calls
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Step by Step
Entering commands with tone dialling
(DTMF suffix dialling)
After dialling a number, you can set tone dialling in or-
der to activate equipment - such as an answering ma-
chine or an automatic information or switching system -
by means of command inputs in DTMF mode
(DTMF = dual-tone multifrequency dialling).
Press the key. The lamp lights up.
OH
Enter the service code.
or
Select and confirm.
Select and confirm.
You can now enter commands with keys 0 to 9, the star
key and the square key.
This feature is not applicable for UK and other
countries using tone dialling (default).
Service Menu
Additional functions?
DTMF suffix dialing?
DTMF mode is deactivated as soon as the con-
nection is cleared down.
The "DTMF suffix dialing" display may appear at
the end of number input, depending on the PBX
configuration. You can then proceed to enter
commands as soon as you have dialled a number.