Binatone Acura 3000 User Manual page 5

If you have a Broadband line
If you connect your telephone to
a line with a broadband
connection, you will need to
insert a micro-filter between the
telephone and the telephone line,
otherwise you may get
interference between the telephone and the broadband, which could cause
problems.
In a home with broadband, every telephone must have a micro-filter connected,
not just the one at the telephone point that your modem is connected to.
If you need more broadband micro-filters, contact your broadband supplier.
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