Closed Network RX is a function that restricts fax senders by passwords.
When receiving a fax, the machine checks the password sent from the sender against the password preset for this machine and, if they match, accepts transmission.
You can use this function only when the remote machine is one of our models that has Password TX function.
Sending a Fax with a Password (Password TX) (Here)
Enable the Closed Network RX function. Specify the password to restrict the communication.
For details on the setting procedure, refer to Here.