The recipient's fax machine is not ready to receive faxes.
Solutions
Ask the recipient if the recipient's fax machine is ready to receive a fax.
Sending a fax accidently using the subaddress feature.
Solutions
Check if you accidentally sent a fax using the subaddress feature. If you select a recipient with a
subaddress from the contact list, the fax may be sent using the subaddress feature.
The recipient's fax machine is not capable of receiving faxes using the subaddress feature.
Solutions
When sending faxes using the subaddress feature, ask the recipient if their fax machine is capable of
receiving faxes using the subaddress feature.
The subaddress and password are wrong.
Solutions
When sending faxes using the subaddress feature, check that the subaddress and password are correct.
Check with the recipient that the subaddress and password match.
The data being sent is too large.
Solutions
You can send faxes at a smaller data size using one of the following methods.
❏ When you send the fax in monochrome, enable Direct Send in Fax > Fax Settings > Fax Send
Settings.
“Sending Many Pages of a Monochrome Document (Direct Send)” on page 149
❏ Using the connected phone
“Sending Faxes Dialing from the External Phone Device” on page 147
❏ Using On Hook
“Sending Faxes Aer Conrming the Recipient's Status” on page 146
❏ Separating the originals
Cannot Send Faxes (When Optional Fax Boards Installed)
Attempted to send from a line port set to Receiving Only
Solutions
Send the fax from a line for which Transmission Setting By Line is set to Sending and Receiving or
Sending Only.
You can access Transmission Setting By Line by selecting Settings > General Settings >
Fax Settings > Basic Settings from the printer’s control panel.
Solving Problems
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The Printer Does Not Work as Expected
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Cannot Send or Receive Faxes
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