Yealink CP860 User Manual page 26

User Guide for the CP860 HD IP Conference Phone
CPE80 is a directional microphone. Its coverage range is 120 degree. Ensure the microphone
faces the speaker.
When the size of the conference room is more than 16 (4*4) square meters or the spacing
between a speaker and CP860 IP conference phone is more than 2m, one expansion
microphone should be connected to the CP860 IP conference phone.
When the size of the conference room is more than 36 (6*6) square meters, two expansion
microphones should be connected to the CP860 IP conference phone.
Following the following guidelines to ensure optimum performance with the CP860 IP
conference phone and the expansion microphones:
Do not move or handle the CP860 IP conference phone or the expansion microphones
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14
(CP860+single expansion microphone)
(CP860+two expansion microphones)