Fortinet FortiFone FON-C70 User Manual page 14

When the size of the conference room is more than 36 (6x6) square meters, two FF-M70
expansion microphones should be connected to the FON-C70 IP conference phone.
Figure 3: FON-C70 + two FF-M70
Follow these guidelines to ensure optimum performance with the FON-C70 IP conference
phone and the FF-M70 expansion microphones:
• Do not move or handle the FON-C70 IP conference phone or the FF-M70 expansion
microphones while on a call.
• The best spacing between microphones and participants should be 0.5m to 2m.
• Minimize background noise from air conditioning units, fans or other equipment in the
conference room. Keep the microphone far away from the noise source.
Installation Page 8 FortiFone User Guide