Siemens ROLMphone 120 Series User Manual page 108

To answer a call
on a Preview line
4-10 ROLMphone 120/240/400 Series User Guide
Initiate a hands-free speakerphone
operation. Refer to "Using Your
Speakerphone (RP240, RP240E, and
RP400)" on page 2-12 for information on
how to make a call on the speakerphone.
OR
Place the handset on-hook if it is off-hook.
OR
Place the handset off-hook if it is on-hook.
If your phone is idle, go off-hook and begin
speaking while the preview information is
displayed.
If you are active on a call, turn the Preview
key off before answering the call.