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  1. #1
    Service Manager 1,000+ Posts
    Sharp mx-fxx2 dropping sending faxes

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    Sharp mx-fxx2 dropping sending faxes

    I'm having an issue with a mx-fxx2 fax that is dropping large faxes in the middle of transmission, for example, I will send a 15 page fax, the receiving fax will pick up and the transmission will start... it sends about 3 pages then drops out and will go into redial mode and will do the same thing once it redials. It has the current fax firmware 01.03.P2, performed sim 66-10, swapped out the fax kit and memory (yes, the memory is in the correct slot), I also had the telephone company come out to check the lines and I was told the lines are good, last of all, I plugged in another fax to the line and had no issues sending or receiving. I have seen some posts to change baud rates but am unsure how to change them for sending. I looked in the service manual and was looking at switch 34 3-6 , it says the factory setting is v17 2400bps. Is this the soft switch I should be in? It states if I change it to 1001, it will put it into v17 9600bps. Is this the how I change the baud rates for sending?
    The fax is not having an issue receiving, its just sending that it is dropping out. Any help would be appreciated.

  2. #2
    Senior Tech 250+ Posts spanky's Avatar
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    Re: Sharp mx-fxx2 dropping sending faxes

    Have your customer check with their phone provider to see if the fax line has call waiting in it.

    I had a machine acting the same way and what was happening was a fax was trying to come in as one was being sent.

    The tone that was generated for the incoming call caused the fax to disconnect the line.

  3. #3
    The Wolf 2,500+ Posts mojorolla's Avatar
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    Re: Sharp mx-fxx2 dropping sending faxes

    Make sure you are using the 2 line fax cord that comes with the kit.
    A 4 line fax cord will cause this symptom. There are also separate baud rates for TX and RX.
    If it is a VOIP system, set all baud rates to 9600, turn off v34 and ECM, change the coding to MMR.

    Failing to plan is planning to fail!!!

  4. #4
    Service Manager 1,000+ Posts
    Sharp mx-fxx2 dropping sending faxes

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    Re: Sharp mx-fxx2 dropping sending faxes

    Quote Originally Posted by mojorolla View Post
    Make sure you are using the 2 line fax cord that comes with the kit.
    A 4 line fax cord will cause this symptom. There are also separate baud rates for TX and RX.
    If it is a VOIP system, set all baud rates to 9600, turn off v34 and ECM, change the coding to MMR.

    I have read some of your prior posts concerning fax issues and seen where you have posted to make sure it is a two line fax cord, I checked and it is. I am going to adjust some of the speed setting and see if that works.

  5. #5
    Senior Tech 250+ Posts spanky's Avatar
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    Re: Sharp mx-fxx2 dropping sending faxes

    Attached is a bulletin for the MX-M283-503 series with the MX-FXX2 fax.

    It shows how to dumb down the fax

  6. #6
    Service Manager 1,000+ Posts
    Sharp mx-fxx2 dropping sending faxes

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    Re: Sharp mx-fxx2 dropping sending faxes

    Well, fingers crossed, I think the issue is resolved. It's been two days and no issues ( I hope I'm not jinxing myself and speaking too soon...as I am very superstitious about saying anything is fixed in any way.) Thank you all for the help! I appreciate it.

  7. #7
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    Re: Sharp mx-fxx2 dropping sending faxes

    Hi everyone
    I am working with a sharp MX-M2651 it has a MX-FX15 Expansion kit the problem I am having is is the same thing because we are running VOIP
    I need to slow down the Baud Rate to 9600 I went throught this trend and was unable to find switch 27 - 29 on the unit itself or on the board it was plugged into however I did see a switch or SW3 1 and 2 next to the connector that the MX-FX15 was plugged into. I am missing something or looking in the wrong place thanks for any help .

  8. #8
    Senior MFP Technician 100+ Posts ihatefinishers13's Avatar
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    Re: Sharp mx-fxx2 dropping sending faxes

    Quote Originally Posted by erickott View Post
    Hi everyone
    I am working with a sharp MX-M2651 it has a MX-FX15 Expansion kit the problem I am having is is the same thing because we are running VOIP
    I need to slow down the Baud Rate to 9600 I went throught this trend and was unable to find switch 27 - 29 on the unit itself or on the board it was plugged into however I did see a switch or SW3 1 and 2 next to the connector that the MX-FX15 was plugged into. I am missing something or looking in the wrong place thanks for any help .
    Softswitches are in simulation mode - in this case it's in 66-1.

  9. #9
    Senior Tech 100+ Posts Hart's Avatar
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    Re: Sharp mx-fxx2 dropping sending faxes

    Quote Originally Posted by erickott View Post
    Hi everyone
    I am working with a sharp MX-M2651 it has a MX-FX15 Expansion kit the problem I am having is is the same thing because we are running VOIP
    I need to slow down the Baud Rate to 9600 I went throught this trend and was unable to find switch 27 - 29 on the unit itself or on the board it was plugged into however I did see a switch or SW3 1 and 2 next to the connector that the MX-FX15 was plugged into. I am missing something or looking in the wrong place thanks for any help .
    There is also the possibility to tell the copier that it's a VOIP line in the settings (sadly can't produce a screenshot).

    When you connect to a digital line When Digital Line Network is enabled, the send level will be 15 dB or less when you
    connect to a digital line. In "Settings (administrator)", select [System Settings] → [Image Send Settings] → [Fax
    Settings] → [Default Settings] → [Digital Line Network].

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