C287 VoIP faxing

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  • copyman
    Owner / Technician

    Site Contributor
    2,500+ Posts
    • Sep 2005
    • 4651
    #1

    C287 VoIP faxing

    Any member here ever use a GrandStream device for faxing VoIP? My customer had this Grandstream working on their old Canon copier. I installed fax in their C287 and tried to use the Grandstream, it has dial tone, feeds in original, shows it's sending, then stops and error report shows NG. The code was T00. If you call the fax # your hear the fax tone. By the way Grandstream is a device like a switch that has ethernet cable going in and phone line going out to copier fax. Are there any settings that need to be done on copier side for VoIP to work?
    Thanks in advance
    Tags: None
    • Duplicator
      IT Manager

      100+ Posts
      • May 2022
      • 245
      #2
      Yes. We use grandstreams here in our office. However, to get fax to work right with VoIP the phone system, ATA (Grandstream), and the VoIP provider need to support T.38. As long as the machine has SuperG3 on it should allow T.38 to start. We turn ECM off and dial tone detection off in service mode as well. There are also settings to enable in the Grandstream and phone system.

      WIthout T.38, it will probably work most of the time but randomly there will be blank pages, missing pages, or just failure messages. There is no way to fix that since VoIP and fax just...don't mix.

      Konica has an option for VoIP lines in the fax settings. This setting is for VoIP lines without T.38. To make it show up set dip switch 237 to hex 20. When this option is enabled it makes the machine fail less on VoIP lines without T.38.
      Worked in IT for 12 years from Helpdesk up to System Administrator. Now working as the IT Manager at a copier company for the last 4 years.

      If I helped you out, please give me a thumbs up! It helps my reputation.
        👍 1

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        • copyman
          Owner / Technician

          Site Contributor
          2,500+ Posts
          • Sep 2005
          • 4651
          #3
          Update, The customer called and said they are receiving faxes. So not sending is the issue. When I've seen new fax installs receiving but not sending it was always the country code was wrong but I always setup by the book, country code & initialization. Thanks again for the help

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            • copyTcat
              Senior Technician

              50+ Posts
              • Apr 2015
              • 58
              #4
              What is the model # of the Grandstream device?

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                • copyman
                  Owner / Technician

                  Site Contributor
                  2,500+ Posts
                  • Sep 2005
                  • 4651
                  #5
                  Originally posted by copyTcat
                  What is the model # of the Grandstream device?
                  Hope this helps. I took the 1st pic the rest are stock of what it looks like. See attached
                  Attached Files
                  Last edited by copyman; 12-06-2024, 02:09 AM.

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                    • Duplicator
                      IT Manager

                      100+ Posts
                      • May 2022
                      • 245
                      #6
                      That's an HT801. The 2 line version is an HT802. That's the model we are using. Works great with T.38 when configured.
                      Worked in IT for 12 years from Helpdesk up to System Administrator. Now working as the IT Manager at a copier company for the last 4 years.

                      If I helped you out, please give me a thumbs up! It helps my reputation.

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                        • copyman
                          Owner / Technician

                          Site Contributor
                          2,500+ Posts
                          • Sep 2005
                          • 4651
                          #7
                          Originally posted by Duplicator
                          That's an HT801. The 2 line version is an HT802. That's the model we are using. Works great with T.38 when configured.
                          Ok. Good to know it should work. Thanks

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                            • copyTcat
                              Senior Technician

                              50+ Posts
                              • Apr 2015
                              • 58
                              #8
                              connect an analog telephone and press * * * and than 2. It will let you hear the IP address use this IP to login and program the device.
                                👍 1

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                                • copyman
                                  Owner / Technician

                                  Site Contributor
                                  2,500+ Posts
                                  • Sep 2005
                                  • 4651
                                  #9
                                  Just wanted to update. Ended up using the reset button on the Grandstream device and both RX/TX is now working. Thanks again for the help.

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