MX-1800N (serv.man44). Fax Guide (Supplied as pdf file on m c's Hard Disk Drive). - Sharp Copying Equipment User Guide / Operation Manual. Page 120

This function is used to send a fax to an F-code memory box (relay broadcast) in another machine and have that 
machine relay the fax to multiple end receiving machines.
When the end receiving machines are far from your machine, sending the fax to a relay machine that is close to the end 
receiving machines can help reduce phone charges. A relay request transmission can be used in combination with the 
timer transmission function to further reduce phone costs.

• Verify the F-code (sub-address and passcode) and end receiving machines programmed in the memory box (relay 

broadcast) before you perform an F-code relay request transmission.

• Before this function can be used, the end receiving machines must be programmed in the F-code memory box (relay 

broadcast) in the relay machine.

• The end receiving machines do not need to support F-code communication.

• This function can be used in combination with a broadcast transmission or timer transmission. An F-code relay request 

transmission can also be stored in a program.

• Your machine (the machine that requests a relay broadcast transmission) only bears the cost of sending the fax to the 

other machine (the relay machine). The other machine (the relay machine) bears the cost of sending the fax to each of the 
end receiving machines.

System Settings for Fax: F-Code Memory Box
This is used to create memory boxes (relay broadcast) for F-code relay broadcast transmission.
A memory box name, sub-address, passcode, and end receiving machines are programmed in each box.

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Transmission

The fax is transmitted to each of the 
end receiving machines programmed 
in the F-code relay broadcast memory 
box.

Relay machine
F-code relay broadcast 
memory box

Box name: BBBB
Sub-address: AAAAAAAA
Passcode: XXXXXXXX

Sub-address: AAAAAAAA
Passcode: XXXXXXXX

End receiving machines are 
programmed in this box.