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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 minimise errors in fax operations.

1. Press [Settings] > [All Settings] > [Initial Setup] > [Compatibility].

2. Press the option you want.

• [Basic(for VoIP)] reduces the modem speed to 9,600 bps and turns off colour fax receiving and

Error Correction Mode (ECM), except for colour 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.

• [High] sets the modem speed at 33,600 bps.

3. Press .

• VoIP (Voice over IP) is a type of phone system that uses an Internet connection, rather than a traditional

phone line.

• Brother does not recommend the use of a VoIP line. VoIP limitations in general can cause some

functions of the fax machine not to work correctly.

Related Information

• Telephone and Fax Problems