Brother MFC-J775DW Online User's Manual page 402

Home > Troubleshooting
problems > Telephone Line Interference/VoIP
Telephone Line Interference/VoIP
If you are having problems sending or receiving a fax due to possible interference on the telephone line or if you
are using a VoIP system, we recommend changing the modem speed to minimize errors in fax operations.
1. Press Settings.
2. Press a or b to select the following:
a. Select [Initial Setup]. Press OK.
b. Select [Compatibility]. Press OK.
c. Select [Normal] or [Basic(for VoIP)]. Press OK.
• [Basic(for VoIP)] reduces the modem speed to 9,600 bps and turns off color fax receiving and
ECM, except for color fax-sending. Unless interference is a recurring problem on your telephone line,
you may prefer to use it only when needed.
To improve compatibility with most VoIP services, Brother recommends changing the compatibility
setting to [Basic(for VoIP)].
• [Normal] sets the modem speed at 14,400 bps.
3. Press Stop/Exit.
• VoIP (Voice over IP) is a type of phone system that uses an Internet connection, rather than a traditional
phone line.
Related Information
• Telephone and Fax problems
• Voice Over Internet Protocol (VoIP/Telephone Line Interference)
• Error and Maintenance Messages
> If You Are Having Difficulty with Your Machine > Telephone and Fax
396