Brother MFC-640CW - Manual (Page 54)

2 - 9 GETTING STARTED
Setting Volume Amplify
Please carefully read Choosing the Handset Volume on page 2-8
before you do the following steps:
1
Press Menu/Set , 1 , 4 , 5 .
2
If none of the users are
hearing-impaired, press
▲ or ▼ to
select Off, and then press Menu/Set and go to Step 4.
—OR—
If some or all of the users are hearing-impaired, select
On
, and then press Menu/Set .
3
If all the users are hearing-impaired, press ▲ or ▼ to select
Permanent , and then press Menu/Set .
—OR—
If only some of the users are hearing-impaired, select
Temporary
, and then press Menu/Set .
4
Press Stop/Exit .
Volume
5.Volume Amplify