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Rolm phone - Behind these two slits ...
speaker microphone... at the base of the telephone is the speaker phone microphone.  Without these two slits ... the telephone is not a true speaker phone.  If your telephone has these two slits and the called party cannot hear you speak ... check with your telephone system administrator to see if your telephone is programmed correctly as a speaker phone.
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When using the speaker phone ... note that room and background noise can drowned out the speaker speaking through your speaker.  To avoid this cutting out effect ... press the ...
Mute... button while the other end is speaking.
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To adjust the speaker volume while on the speaker phone press the volume up or volume down buttons ...
volume up... volume downw
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Phone User Guide   |   Siemens Rolm Phone User Guide