Telephone Problems (MF4890dw/MF4870dn/MF4750 Only)

See the following sections:

Calls Do Not Connect or the Wrong Number is Dialed.

Listen for the dial tone before entering a telephone number. If you enter a number before the dial tone occurs, the call may not be connected or you may inadvertently dial the wrong number.

Cannot Make a Call Using the External Telephone.

If you cannot make a call using the external telephone when the fax receive mode is set to <Fax/Tel Auto Switch>, set <Public Line Connection> settings to <Adapter 1> or <Adapter 2>.
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