Cannot Send Faxes to a Specific Recipient

If the recipient machine does not pick up your call within 50 seconds after the printer has finished dialing, the call ends with an error. Dial using the (On Hook) feature or using a connected telephone to check how long it takes before you hear a fax tone. If it takes more than 50 seconds, add pauses after the fax number to send the fax. Tap to enter the pause. A hyphen is entered as the pause mark. One pause is about three seconds. Add multiple pauses as needed.

Select the recipient from the contact list, and then select Edit > Fax Speed > Slow(9,600bps).