Brother MFC-640CW - Manual (Page 53)

GETTING STARTED 2 - 8
Choosing the Handset Volume
(For Volume Amplify)
Before you begin to use the machine, you must decide if you need to
set the handset volume to Volume Amplify:On for a user who is
hearing-impaired. The AMPLIFY volume level complies with FCC
standards.
Volume Amplify:Off
This default setting is appropriate if none of the users are
hearing-impaired. During a conversation, users can press
or
on the control panel to adjust the volume to Low or High. When the
handset is replaced, the handset volume will remain until you change
it again.
Volume Amplify:On —Temporary
This setting is appropriate if some of the users are hearing-impaired.
During a conversation, users can press
or on the control
panel to adjust the volume to Low, High or Volume Amplify.
When the handset is replaced, the handset volume returns to the
default setting of Low.
Volume Amplify:On —Permanent
Choose Volume Amplify:On—Permanent if all of the users are
hearing-impaired. During a conversation, users can press
or
on the control panel to adjust the volume to Low, High or Volume
Amplify
. When the handset is replaced, the handset volume
returns to the default setting of Volume Amplify.
WARNING
It is important that you do NOT choose Permanent unless ALL
the users are hearing-impaired. Otherwise, the default setting of
Volume Amplify
may damage the hearing of some users.
When you press or on the control panel to adjust the
volume, the LCD shows the setting you are choosing. Each key
press changes the volume to the next setting.