us.dmr-marc.net

The DMR-MARC Worldwide Network

Our network is an all-digital group of over 500 DMR-MARC repeaters in 83 countries with 81789 registered users. There are 5226 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?




DMR-MARC Statement Regarding Proposed Brandmeister ID Restictions

    Worldwide Amateur Users,

    DMR-MARC would like to thank amateur radio hobbiests worldwide for working as a team and supporting the universal ID system in place since 2010. Before that time we had many fractured groups using multiple ID schemes that were often incompatible. There were many hams complaining about stolen IDs from a different group. Many groups came together in 2010 and agreed on a common format so we could use one ID on multiple systems without disruption to other users or repeaters. This system has worked well for over 8 years and it allows us to expeditiously root cause many technical issues with a logical ID scheme. Our admins have tirelessly worked to accommodate most people, even those who were unnecessarily demanding at times. We noticed recently that the Brandmeister group which has been in existence for a couple years now has made an ultimatum which we feel is neither practical, necessary, nor reasonable. In fact, the USA overflow ID range using a 1 prefix to address the explosive growth of DMR, especially in the USA, was agreed upon by members of the US, Canadian, European, Australian, and New Zealand teams more than a 2 years before Brandmeister came into existence. Hundreds if not more IDs have already been allocated for operators and have worked just fine on the Brandmeister system as quoted on their website. It is only now that the Brandmeister authorities have decided they no longer wish to support these IDs starting in May. It is not reasonable to expect volunteers who have spent much of their valuable free time setting up servers, designing databases, maintaining those servers and databases, and answering email change requests for IDs that have already been issued and are working perfectly fine to reissue new IDs which would cause an unreasonable burden on our volunteers. Please note, we will continue issuing IDs to USA hams in the 316x to 319x range to accommodate DMR growth. But, this only prolongs the inevitability of again reissuing IDs in the 1x range as we have for over 2 years already. Therefore, we ask the Brandmeister authorities to consider the inevitable ramifications of DMR growth with the understanding there are only a finite number of IDs in each prefix space. We ask that they exhibit common sense flexibility by cooperating with the many other respected worldwide groups that use the universal ID system which was established before their group was formed so that we may continue to share an international and interoperable ID system that works for all.

    73s,
    The DMR-MARC Admin Team


    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
          2507056 R7RV Yuriy ,
          1157021 KN4LVM David Lauderdale Lakes, Florida
          2064110 ON6CC Marc Lommel, Limburg
          2345021 M6NYW Allan Hull, England
          2345020 M6NYR Shayne Beverley, England
          2355399 MI3EOH Brian Warrenpoint, Northern Ireland
          2345019 M6NYB Morgan Durweston, England
          2355398 2I0WMN William Newry, Northern Ireland
          2860241 TA2ILN Ismet Ankara,
          2229258 IT9MYB Paolo Castelvetrano, Sicily



        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
          XPR4550,DM3601,XPR6550,DP3601
          Mobiles and Portables
          R01.09.10* (or newer)
          XPR5550,DM4601,XPR7550,DP4601,SL7550
          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!