The DMR-MARC Worldwide Network

Our network is an all-digital group of over 500 DMR-MARC repeaters in 80 countries with 75981 registered users. There are 4918 registered DMR repeaters world-wide in our 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 registration system and talk group distribution 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.

    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

      New Repeaters on the network

        CallsignLocationFrequencyColor CodeOffsetCountry
        W1MLLDennis, Massachusetts 146.47000 11 -1.500
        KA1HCXPortable, Connecticut 448.62500 1 -5.000
        KB5VPManchester, Vermont 441.35000 7 +5.000
        W3SCPottsville, Pennsylvania 444.39375 1 +5.000
        N1JBCNorth Providence, Rhode Island 145.37000 2 -0.600
        N1WWGardner, Massachusetts 145.34000 3 -0.600
        W1MWVNorth Conway, New Hampshire 448.77500 2 -5.000
        KB5VPManchester, Vermont 441.35000 7 +5.000
        W6TRWRedondo Beach, California 449.46250 2 -5.000
        VK3RPSMT COTTRELL , Victoria 439.72500 1 -5.000

      New Users on the network

        Radio IDCallsignNameLocationCountry
        2321144 OE1DGW Gerhard Wien, Wien
        2344723 M1GUR Peter Leicester, England
        2344722 2E0ELO Daniel Hull, England
        2406227 SM6PPF Michael Munkedal, Vuostra Guatalands l
        5151047 DV1YYM Rodolfo Pasig, National Capital Region
        2354375 MM6LQF James Uphall, Broxburn, Scotland
        2681105 CR7AQP Luis Felgueiras, Porto
        2344721 M1COV SYDNEY HULL, England
        2353344 MW6FEF Matt Buckley, Wales
        2344720 M6WJA ANDREW BARNSLEY, England

      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 9154

      • 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!