The default speakerphone setting for a SNOM phone is ‘quiet room.’ This can cause the recipients on the other end of the phone to complain about call quality. After playing around with some of the settings we found that the most optimal setting is ‘normal room.’
This is found in the Setup > Advanced > Audio > Handsfree Mode. After making a change, be sure to click on the Save button. The setting takes effect immediately.
Echoic room means, since the room is echoic, be aggressive on the echo cancellor. If the room is not so echoic, this setting could cause the chopping since the echo cancellor is aggressive but the room is not so echoic.This SNOM wiki page describes these settings.