Plantronics Calisto 620-M - Manual (Page 13)

For best results
Calisto 620-M is a business-quality communication device with sensitive microphones;
following the recommendations below will assure a good user experience for you and people
at the other end of the call.
• Set speakerphone in an open area during use
• Keep objects 12 inches (304 mm) away from speakerphone for best performance
• Avoid moving the unit unnecessarily
• Avoid rustling papers, tapping pencils etc., near the speakerphone
Important Tips for Using your Speakerphone
13