The DMR-MARC Worldwide Network

Our network is an all-digital group of over 500 DMR-MARC repeaters with over 115000 registered users. There are over 5300 registered DMR repeaters world-wide in the RadioID database. We are all amateur radio operators many of whom are Motorola Solutions employees, Motorola Service Station employees, dealers, system installers and Motorola equipment aficionados.

Please consider a donation to support the talk group distribution (core) servers by clicking on the Donate button to the right. Even small amounts help!

Repeaters on our network are connected all the time. TRBO radios have great voice quality, great coverage, and extended battery life all in LESS THAN 1/3 the channel bandwidth of a traditional analog FM repeater with TWICE as many voice channels! Our mission is to offer you a reliable and scalable choice in connectivity: local, regional, national and international. Isn't it time you upgraded to digital radio's cutting edge?

Choices and Reliability with our DMRPlus Partnership!

    Amateur radio is constantly evolving. We support your desire to have control of your repeater. You probably want access to numerous talkgroups but don't want to be forced to carry talkgroups with inappropriate behavior or those that burn out your repeater's power amplifier rendering it an expensive paper weight. Maybe you want an network that embraces experimentation. Maybe you want a network that embraces reliability and great sounding audio. We can bet you want a network that offers multiple and portable connectivity options like traditional repeaters, hotspots, and MMDVM devices. You can have the best of both worlds with DMR-MARC and DMRPlus on one repeater. Read all about it here and apply here if you're interested. We'd love to have you join us. We offer connectivity to over 300 talkgroups and reflectors and access to the best hams in the world.

    A Big THANK YOU to our Supporters!

    DMR-MARC would like to thank all of those who have donated to support our team. These donations have been put to good use recently. We upgraded our CC1 and CC2 servers with more than double the RAM and faster multi-core processors. We updated our web hosting services. We updated our DMR+ IPSC2 and BMaster+ servers. The cost to support all of this adds up quickly so your support is greatly appreciated. We hope that you will enjoy a more reliable network and more talkgroup/reflector choices with these investments in our architecture.

    New MMDVM and Dongle Servers

    We upgraded our dongle severs on October 18, 2018. MMDVM and hotspot users should vist the DMR+ Configuration page for more details. You should no longer use the California and Wisconsin servers. Please use one of the following: IPSC2-NewYork (main), IPSC2-Indiana, IPSC2-Illinois, IPSC2-Australia, or IPSC2-NewZealand servers. The DMR+ team has modified the server architecture causing these changes.

    New Talkgroups Available

    We are offering several new talkgroups to cbridge admins. Consider joining us! you may wish to subscribe to.

    TG# Description Cbridge LID
    33 North America 2 33
    113 UserActivated 1 87
    123 UserActivated 2 88
    133 DMR+ USA 73
    134 DMR+ French Canadian 77
    143 DMR+ UK 74
    153 DMR+ South Pacific 75
    163 XLX313B 34

    Registration System

    Registration system now open, you will be transfered to which has taken over the DMR-MARC registration system and is now the Authority for Digital ID's for Amateur Radio globally, along with for EU Registrations.

    DMR-MARC and DMRPlus Partnership Update

    Dear DMR-MARC users,

    As a follow-up to our announcement in August 2016 regarding our partnership with the DMRPlus network, we have some more exciting news to share with you regarding our collaboration with the DMRPlus team. Firstly, our testing of the new DMRPlus interconnection talkgroups, which include DMR+ USA (TG133), DMR+ UK (TG143) and DMR+ South Pacific (TG153) has been very successful and we have decided to roll these talkgroups out to all repeaters connected to our network. We have also added DMR+ Quebec - French (TG131), and DMR+ Latin America - Spanish (TG134). This will allow any device connected to the DMRPlus network, including commercial Motorola or Hytera repeaters, homebrew MMDVM repeaters or base stations, the upcoming DV4mobile and DV4mini users worldwide to access users on either the DMRPlus or DMR-MARC networks. The rollout has already started and will be completed over the next few weeks.

    Secondly, we have decided to allow all of our US regional talkgroups (TG3169, TG317x), and Canadian provincial talkgroups (TG302x) to be interconnected with the DMRPlus network as well. By combining the stable and robust nature of DMR-MARC network with the flexibility and experimental nature of the DMRPlus network, we hope to create a combined global DMR network that suits the needs of all ham DMR users.

    With regard to the traditional DMR-MARC talkgroups, we have heard numerous concerns expressed by our users around the potential impact of experimental devices on these talkgroups, so accordingly these talkgroups will remain exclusive to the DMR-MARC network for the time being. These talkgroups include:

    - Worldwide (TG1)
    - Europe (TG2)
    - North America (TG3)
    - Oceania (TG5)
    - Worldwide German (TG10)
    - Worldwide French (TG11)
    - Worldwide English (TG13)
    - Worldwide Spanish (TG14)

    We believe that by providing a two tier approach to talkgroups with some designated as robust and reliable, while others open to experimentation and feature development, we can provide our users with the best possible DMR experience.

    In addition, we would like to thank all of our loyal users for their generous contributions to our network over the last seven years. Many of you have invested time, hardware, and financial resources to our network, which has helped us to build the world's largest DMR network consisting of over 500 repeaters in 60 countries that is used by over 10,000 hams every day. Most importantly, your efforts have helped to change the face of ham radio digital communications forever and we hope the hobby is all the better for it.

    Again, we appreciate all of your support and look forward to making DMR great for the benefit of the entire ham radio community.

    The DMR-MARC Administrative Team. .

    North American Talkgroup has Returned to Full-Time Usage, not Just a Calling Channel

    DMR-MARC Network Users,

    Effectively immediately, the North America talkgroup (TG3) will return to its original purpose as a wide-area talkgroup available to all North American hams for general QSO at any time. We believe that the North America talkgroup is more effective as a meeting place for all hams, rather than only as a calling channel. Accordingly, we encourage all hams to use this talkgroup for general QSOs spanning across multiple North American repeaters as a way to bridge the distance between us. In addition, we kindly ask that hams respect the fact that this talkgroup is widely distributed and that they keep conversations to a reasonable length and take regular pauses to accommodate others that might want to join the QSO. Remember, User Accessible English 1 (TG113) and User Accessible English 2 (TG123) are available on many systems as talkgroups to continue your conversation if you feel that it is going to be lengthy in nature.

    Hope to hear you all on North America soon! Best regards & 73’s!

    The DMR-MARC Administrative Team

    Featured Stories

      Help DMR-MARC maintain the Infrastructure that you enjoy, please donate today to help us keep the Servers and C-Bridges running as well as purchasing new infrastructure to help expand the network you love.

    • The Weekly Tech Net has moved back to North America TG3 at 02:00 UTC Thursday (Wednesday night in the Americas - 9pmET, 8CT, 6PT)

    • DMR-MARC needs your help! We're looking for additional curators for our Facebook site to help keep it current with good quality content related to the growth of DMR within amateur radio, plus the latest DMR-MARC news. Good writing skills and experience with blogging would be a definite asset. If interested, please message us via Facebook with your application now! - DON, VA3XFT

    • DMR-MARC on Amateur Radio Newsline (1 March 2013): Audio or Text

    • Read all about DMR-MARC at the Ontario Science Centre. Thanks VA3XPR!

    • BEWARE! CPS 8.5 requires a 25 kHz entitlement key to program 25 kHz analog channels. The entitlement key is free with a paid CPS subscription but we see no need to update subscriber firmware newer than R01.09.10 using CPS 8.0

    Network Update

    • Please make sure you read the radio programming instructions before transmitting on the network!

    • FIRMWARE MATRIX - We HIGHLY recommend ALL DMR-MARC trustees and bridge partners to ONLY use the below firmware. This helps minimize system incompatibilities.
      Repeaters ONLY R02.40.20
      Mobiles and Portables
      R01.09.10* (or newer)
      Mobiles and Portables
      R02.30.01 (or newer)
      CP200d, CM300d, XPR2500
      Mobiles and Portables
      R01.00.00 (or newer)
      C-Bridge ONLY 9463
      IPSC2 Server 08.09.15 (or newer)

    • IMPORTANT!!   Repeater Firmware R02.30.20 has been released. Please update your repeater immediately. NEVER BLINDLY UPGRADE TO THE LATEST VERSION OF REPEATER FIRMWARE!!! Newer firmware is not always better. Sometimes it has serious flaws. Only follow the Firmware Matrix suggestions. You have been warned. Again.

    • ADVISORY!  If you upgrade an XPR4550 or XPR6550 past R01.09.10, you will need a 25 kHz entitlement key for wideband 25 kHz analog channels. Therefore, we recommend R01.09.10 and CPS version 8 for programming those units.

    • The Regional talkgroups are now available to users in any region.

    • Regional Talk Group Status:
      Talkgroup Name Group Call Activation
      Northeast 3172
      Mid Atlantic 3173
      Southeast 3174
      Southern Plains 3175
      Southwest 3176
      Mountain 3177
      Midwest 3169

    • NETWORK ISSUES: If you notice any problems, complete the form under the Contact Us link at the top of the page. This way your observation gets routed to the specialists. Complaining on the air, even during the weekly net, will do you no good. Thanks for your patience and help in this matter. If you have any additional detailed questions, contact your local repeater trustee.

    • Do you have a coordinated repeater pair, a repeater site identified, and high speed access? Would you like to be our newest network affiliate? Apply to join our network today!