FAX ONLY mode is best used when you have your FAX/MFC on a dedicated fax line. In this receive mode, the FAX/MFC automatically answers every call with receiving tones as if it were an incoming fax. If you select Fax Only mode, you cannot receive incoming voice calls on the telephone line your FAX/MFC is connected to, though you can make outgoing calls on the line.

In MANUAL mode, you control the telephone line and must answer every call yourself. If you answer the line and hear fax tones, wait until your FAX/MFC begins to respond with its own receiving tones, then hang up the phone. The MFC will receive the fax and print it out. You can receive incoming voice calls when using this receive mode just as you would if the FAX/MFC was not present on the line. This mode is preferable if you do not receive many faxes, if the FAX/MFC will be on the same telephone line as a computer modem, or if you are using Distinctive Ring.

EXT.TEL/TAD mode is to be used when an external telephone or an external TAD (telephone answering device) is connected to the EXT. jack. The TAD automatically answers every call (voice messages are stored on the TAD while fax messages are printed.) or you control the phone line and must answer every call yourself with an external telephone.

When using this mode with an external TAD, these six guidelines MUST be followed:

1. (Only for USA)
   The answering machine must be connected to the jack labeled EXT on the back of the FAX/MFC. The EXT.TEL/TAD mode may not function properly if you connect the external answering machine into a wall jack.
   
   
2. The FAX/MFC's receive mode must be set to EXT.TEL/TAD.
   
   
3. We recommend you record 5 seconds of silence at the beginning of your answering machine's outgoing message. This allows your FAX/MFC time to detect incoming fax tones from a sending machine.
   
   
4. Your answering machine's outgoing message must be no more than 20 seconds long.
   
   
5. You must end your outgoing message by giving your Fax Receive Code for people sending manual faxes. For example: "After the beep, leave a message or send a fax by pressing *51 and Start."
   
   
6. The answering machine must be set to answer in 4 rings or less. The FAX/MFC's Ring Delay setting does not apply in EXT.TEL/TAD mode.