Fix Brother Error Comm. Error: Communication Error

warning Severity: warning

If your Brother printer is displaying error Comm. Error, do not worry – this is a known issue with a proven fix. This error typically indicates communication error that can usually be resolved without a service call. Follow the steps below to clear this error.

What Causes Brother Error Comm. Error?

This error can be triggered by one or more of the following issues:

• Fax communication failure
• Phone line quality too poor for fax transmission
• Fax speed set too high for the line
• VoIP compatibility issue

How to Fix Brother Error Comm. Error

Follow these steps in order. After each step, check whether the error has cleared before proceeding to the next one.

1. Step 1: Reduce fax speed to 9600bps in fax settings
2. Step 2: Enable Error Correction Mode (ECM)
3. Step 3: Check phone line connection to the LINE port
4. Step 4: Install DSL filters if on a DSL line
5. Step 5: If using VoIP, set compatibility to Basic
6. Step 6: Try resending the fax

Affected Brother Printer Models

The following Brother printer models are known to display error Comm. Error:

• Brother MFC-L2710DW
• Brother MFC-J4335DW
• Brother MFC-J6945DW
• Brother MFC-L2750DW

Related Brother Error Codes

If you are troubleshooting error Comm. Error, these related error codes may also be relevant:

• Replace Drum – Drum Unit End of Life
• Drum Error – Drum Unit Malfunction
• Toner Low – Toner Cartridge Low
• Machine Error 46 – Unable to Print – Waste Toner
• Unable to Clean 46 – Purge Unit Error