Siemens 300 H - Manual (Page 21)

Setting up calls
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Step by Step
Setting up calls
Dialling with the handset off-hook
Q
Lift the handset.
S
Internal: Enter the number.
External: Enter the external code and the number.
The called party is busy or does not answer:
W
Replace the handset.
Dialling with the handset on-hook
S
Internal: Enter the number.
External: Enter the external code and the number.
The called party answers via the loudspeaker:
Q
Lift the handset.
or When handset is on-hook: speakerphone.
The called party is busy or does not answer:
Press the key. The lamp goes out. Speaker