Vertical Communications 8012S - Manual (Page 144)

134 Comdial October, 02
In some situations, such as when either you or the distant party is in a
noisy environment, you may have to lift your handset to ensure a
clear conversation. When using your speakerphone, the microphone
and loudspeaker are farther away from you than when you use a
handset. Both the signal from the loudspeaker and the signal to the
microphone must be strengthened.