Brother International MFC 7440N Users Manual - English - Page 120
Telephone line interference
UPC - 012502620631
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Telephone line interference B If you are having difficulty sending or receiving a fax due to possible interference on the telephone line, we recommend that you adjust the Equalization for compatibility to reduce the modem speed for fax operations. a Press Menu, 2, 0, 1. Miscellaneous 1.Compatibility b Press a or b to choose Basic(for VoIP) or Normal or High (MFC-7840W). Basic(for VoIP) cuts the modem speed to 9600 bps. and turns the error correction mode (ECM) off. For a standard telephone line: If you regularly experience interference on your standard telephone line try this setting. If you are using VoIP: VoIP service providers offer fax support using various standards. If you regularly experience fax transmission errors try this setting. Normal sets the modem speed at 14400 bps. High sets the modem speed at 33600 bps. (MFC-7840W only) Press OK. c Press Stop/Exit. Note When you change the compatibility to Basic(for VoIP), the ECM feature is not available. 106