Modes Cannot Switch Automatically between Telephone and Fax

Is the machine set to automatically switch modes between telephone and fax?
NO
Set the Receive mode to <Fax/Tel Auto Switch> or <Answer>.
"Changing the Receive Mode"
If you have set receive mode to <Answer>, ensure that an external telephone with built-in answering machine is connected to the machine, that it is turned on, and that an answering message has been recorded.
YES
Is the time set for <Ring Start Time> too short?
YES
If you set the ring time too short, incoming faxes may be regarded as incoming phone calls. Set a longer ring time for incoming faxes in <Ring Start Time>.
"Advanced Settings for the Fax/Tel Auto Switch Mode"
NO
Is the line condition of the sender's machine good?
NO
Change the <RX Start Speed>.
"RX Start Speed"
YES
Is the memory full?
YES
Print, send, or delete jobs stored in memory.
NO
Can the sender's machine send a switching signal, to notify your machine of an incoming fax?
NO
Some machines cannot send this signal. In this case, receive the fax manually.
05J0-098