Question about Brother FAX-575 Plain Paper Thermal

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Transmission I am using my 575 on a dedicated Fax line on my Vonage VOIP internet phone system. I also have a purely voice line. Problem is, that my failure rate on transmissions is almost 75%. I almost always get an "NG" - Poor Line condition error message. I have tried everything: 1. Set machine to "Basic" transmission mode 2. I use *99 prefix on all transmissions 3. Tried using "International" mode on individual faxes Vonage says that most Fax machines need to be taken off "ECM" mode to allow for less line sensitivity....but I can't figure out how to do this on the 575. Has anyone ever had similar problem.....Does anyone know how to change or disable ECM feature on this machine. Does anyone have any other thought ??? Thanks Phil Green

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Re: Transmission

Like on my earlier posts. VOIP is not reliable for fax transmissions. Actually dropping the tx and rx speed to to 4800 bps might help. Successful transmissions depends on your bandwidth of your internet service. VOIP faxing suffers from latency, distortion and packet loss errors.

Posted on Aug 13, 2007

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Re: Transmission

This is a strange problem you have here my friend. I found the manual if you need it. it is located here: If you cannot sort it out with the manual, I suggest that you contact Brother USA and see if they can assist you. their telephone number should be on page 1 I think Good Luck

Posted on Jun 13, 2007

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SOURCE: Brother Intellifax 1270E plain paper fax

It could be either. take the machine to anothewr line see if the
error goes away.If it does not call brother customer service. There is an adjustment for input sensitivity of so brother fax machines. It may be in your operators manual

Posted on Jun 11, 2008

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The problem is that the codecs used by VoIP IADs are designed to compress voice, not the analog signals sent and received by modems.
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We suggest these settings on a fax machine for faxing over VoIP; slowing the transmission rate down and allowing the machine to continue receiving the transmission even though a few bits of data were lost, then faxing over VoIP can become more consistent. Our suggestions in many cases can resolve issues that prevent faxing over a VoIP connection, but not in all cases. If after trying and making all the VoIP fax changes we suggest you still cannot fax over your connection then try a Internet Fax service.

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How do I turn off ECM in my Brother MFC 8220?

From the Brother website:
If you are using Voice Over Internet Protocol (VoIP), (a technology that allows you to make telephone calls using a broadband Internet connection instead of a regular (or analog) phone line, review the information listed below. If you are not using VoIP continue to Step 8.

Voice Over Internet Protocol (VoIP) is not a marketed feature of your Brother machine, however there is a compatibility setting available with this machine that may assist with sending and receiving faxes when using VoIP. Adjusting this setting lowers the baud rate (modem speed) and turns ECM (Error Correction Mode) Off. To adjust this setting follow the steps listed below:

  1. Press Menu or Menu/Set => Fax => Miscellaneous => Compatibility.
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I have a new phone carrier(Vonage) and a new DSL modem from at&t. Prior to obtaining either, my fax machine worked fine. Now, I can't send or receive faxes..(Why)

This is a common issue with all fax machines that use a voip service. Basically, the reception and transmission features of the fax machine are not compatible with voip service. There is a modification that you can perform that usually allows you to avoid this problem, you must lower all transmission and reception speeds of the fax modem; this allows the data to be properly carried over the line without much loss or degradation.


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How do I lower the baud rate on a brothers fax 575? I want to use it with my VoIP satellite system. Thanks!

That won't work.

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Trouble faxing and receiving fax from "Brother 575".Can you help me with my fax machine? I have vonage, and I still can't receive any faxes. The machine makes copies, and receives calls,send faxes, but not...

Try changing the "Bandwidth Saver" settings on your Vonage account from the Vonage website. Perform the following:

1. Login to your Vonage account online and click the "Features" tab.
2. Scroll down to the "Bandwidth Saver" link and click on the "Configure" button.
3. You will see a scrollbar with 3 settings: 30kbps, 50kbps and 90kbps

NOTE: My "Saver" was set to 90kbps (Highest Sound Quality) by default.

4. Click on 30kbps (Normal) and click "Submit".
5. Wait about an hour before testing as it could take that long for the change to take effect.
6. Send a test fax to the HP fax test service at 1-888-hpfaxme (1-888-473-2963).

NOTE: This is a GREAT service provided by HP. If your fax goes through correctly, you will receive a return fax within five minutes.

We upgraded to Verizon FiOS and never thought the increased upload speed (4mbps) would present an issue sending faxes. WRONG. We never had fax issues with DSL, Comcast or even Broadstripe VOIP service but for some reason Vonage + FiOS = no fax. That is until we set our Vonage VOIP sound quality to "Normal". Our phone voice quality has been much more reliable since throttling back. This sentiment has also been shared by other Vonage users who have experienced echoing and noise when utilizing the higher quality settings.

Your phone coversations may not have FM quality sound but they will have AM quality and usually that is just fine.

Hopefully this will work for you.

Dave Grannas

Jun 01, 2008 | Brother FAX-575 Plain Paper Thermal

10 Answers

"poor line condition'

This is a problem with your voice over ip service. You have to change the setting on your fax machine for example the Baud speed down to 9600, the ECM= off, and the Oversea settings on. Make sure your VoiP ATA is the first thing after your modem or whatever connection you are using for the internet. If you using and old model fax 95% of the time it will not work with VoIP service.

Jun 12, 2007 | Brother IntelliFAX 1270E Plain Paper Fax

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