bandit26
Level 1: Cadet

how to connect a fax to the nbn modem

How do I conect my fax machine ( brother MFC 7640) to my moden as i cant currently send faxes 

 

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11 REPLIES 11
W201
Level 14: Field Agent

Re: how to connect a fax to the nbn modem

Unfortunately NBN VOIP is optimised for voice tranmission.

 

It does not work for FAX

Yastiandrie
Level 24: Supreme Being
Level 24: Supreme Being

Re: how to connect a fax to the nbn modem

If your fax maxhine is capable of VOIP, you would plug it into the green phone slot on the modem

I am a Complex Customer Service Specialist, nominally working with most assurance products. However, I am not an official representative on CrowdSupport.

IT Helpdesk and Technicial Support by Telstra Platinum
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cretsiah
Level 21: Augmented

Re: how to connect a fax to the nbn modem

@bandit26 this might explain it better than I can

 

https://www.3cx.com/PBX/FAX-VOIP/

 

This maybe of interest to you

https://www.3cx.com/phone-system/

 

you would need a seperate box/computer to install it to

 

you will possibly need to have a number (or both) ported to the Uni-V port(s)

 

as I dont know if the Duet line function still works.

 

you may still need to talk to Telstra Tech about set-up arrangements

Telstra customer 15+ yrs, I am not a Telstra employee and never have been

Kudos and thanks welcomed

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Yastiandrie
Level 24: Supreme Being
Level 24: Supreme Being

Re: how to connect a fax to the nbn modem

Duet lines are decommissioned on the NBN
I am a Complex Customer Service Specialist, nominally working with most assurance products. However, I am not an official representative on CrowdSupport.

IT Helpdesk and Technicial Support by Telstra Platinum
Helping Australians Find the Things that Matter Most with Telstra Locator
bandit26
Level 1: Cadet

Re: how to connect a fax to the nbn modem

Do I need to change anything on the modem ? I have set the fax to voip but still cant send

 

cretsiah
Level 21: Augmented

Re: how to connect a fax to the nbn modem

@bandit26

 

http://www.voipmechanic.com/voip-fax-settings-brother.htm

Telstra customer 15+ yrs, I am not a Telstra employee and never have been

Kudos and thanks welcomed

If I have managed to outsmart myself and give a Solution please mark it as so.
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bandit26
Level 1: Cadet

Re: how to connect a fax to the nbn modem

still not working
W201
Level 14: Field Agent

Re: how to connect a fax to the nbn modem

Is faxing over VOIP possible?
Yes, technically it is possible, but you must set the line to use non compression Codec G711.
Codec that uses compression (e.g. G729) will make the fax fail.

 

Here is the summary taken from various sources.

First make sure that your VoIP connection for you line that you fax on is set to G711. This is a non-compressed codec. Codec that uses compression (e.g. G729) will make the fax fail. Some providers have a "Bandwidth Saver" setting. This would be a compressed codec. Make sure this is Not enabled. If you do not have access to this setting call your provider and make sure your connection is set for G711.

 

I don't think Telstra customers have access to determine the Codec use in Telstra VOIP. Correct me if I am wrong.


If you manage to set the codec to G711 (with help from Telstra of course) you must do three other changes as follow:

 

1. Lower the BAUD rate to 9600

 

Why you need to lower the baud rate to 9600.
Faxing over VoIP can present certain challenges which require a slower transmission speed, so that most of the data get to it's destination. Packet loss, jitter, and latency all add up to corrupt a fax transmission over VoIP.  When a fax machine determines that data is lost, it will shut down the transmission, even though with some bits of data lost you would still have a workable document.  By slowing down the transmission speed to 9600, you increase the probability that most of the data will make the trip.

 

2. disable ECM (Error Correction Mode)

 

Why you need to disable ECM (Error Correction Mode).
The second setting that can also be critical for faxing over VoIP is turning off ECM (error correction mode).  Most newer fax machines have ECM capability, which analyzes the received frames and detects any corrupted data.  Noise, poor signal strength or packet loss can cause part of the the fax information to be lost during transmission.  If any is detected, then a retransmit signal is sent until a error free frame is received.   The problem with this setting over VoIP is that some packet loss, latency or jitter will usually exist on an Internet connection.  The retransmits tend to increase the call duration, adding to the instability of the fax, creating additional  retransmits which then quickly lead to failure with a communication error.  If packet loss on a network gets to a 1 or 2 percent level then faxes will fail consistently.  By disabling ECM, which VoIP Mechanic recommends, the receiving fax machine will not continually request any slightly corrupted transmissions to be resent, ensuring a greater chance of a completed fax.  This could result in a fax image that is of slightly poorer quality (in most cases probably not even noticeable), but in most cases it should be more than sufficient.

 

3. Choose lower resolution setting rather than high or an ultra-fine quality resolution

 

Why you need to lower resolution setting
By lowering the resolution the amount of data that needs to be transferred is reduced, helping ease the overall transmission. The success rate of faxes will significantly increase.

 

 

DavidMjps
Level 2: Rookie

Re: how to connect a fax to the nbn modem

I've connected an Epson WorkForce 645 printer / fax to a FTTN NBN telephone line and it's working normally. I tried but was never able to talk to anyone at Telstra who could change the codec so having it set to 'G711' may not be necessary. I did change my unit to it's slow speed option (14.4k) but that's all.

vonviking
Level 1: Cadet

Re: how to connect a fax to the nbn modem

is it going to be possible to use my fax when I go onto the nbn

Kenobi
Telstra (Retired)
Telstra (Retired)

Re: how to connect a fax to the nbn modem

Hi vonviking, 

 

This page on nbn co's website, specifically the section for 'Fax and Teletypewriter devices', should be able to provide you with the answers you're after.

 

Depending on the type of fax you use, it may not be an issue running it from the green voice port on your nbn modem, however you may need to call the manufacturer of your device to check for compatibility.

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