The DMR-MARC Worldwide Network

Our network is an all-digital group of over 500 DMR-MARC repeaters in 45 countries with 21053 registered users. There are 1732 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.

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?

New Repeaters on the network


  • WR3IRS Charlestown, Pennsylvania
  • N2LEN Greenwich, New York
  • NY4Z Kent, New York
  • W2LGB Thiells, New York
  • W1BHR New Sharon, Maine
  • KQ1L Augusta, Maine
  • N3HF Ocean City, MD
  • N2LEN Schnectady, New York
  • XE2ITZ Chihuahua, Mexico
  • Mt. Ascutney, Vermont

Featured Stories


    The co-creator of the /\/\ Contact Generator has developed a windows program to replace the web based version. please signup at the site below and help test the new windows based contact generator.
    The web based version on trbolnk will cease to function January 1st, 2016

  • The Weekly Tech Net has moved back to North America TG (3) at 0200 UTC Thursday (Wednesday night in the Americas - 9pmET, 8CT, 6PT)

  • The language talkgroups- TG10 (German), 11 (French), 13 (English), 14 (Spanish), 16 (Italian), and 17 (Nordic) are available everywhere now. These worlwide language talkgroups are available to all repeater trustees for intercontinental calls. If you do not have access, send us an email. REMEMBER- TG1 should only be used as a CALLING CHANNEL for less than 2 mins. Then switch to another talkgroup.

  • UA113 has replaced TAC310 on many DMR-MARC repeaters. Unlike TAC310, it is internationally coordinated and follows the international GSM ID plan. (310 is a USA, not an internationally allocated talkgroup) This is a PTT on Demand talkgroup, meanining it is normally inactive until you PTT. Other language on Demand talkgroups are also available. Use these worldwide talkgroups if you wish to make a call to a single person or small group and use the mininum number of repeaters.
    Talkgroup Language
    113 English
    110 German
    111 French
    114 Spanish
    116 Italian
    117 All Nordic

  • The DMR Sandbox project has launched. This is a way for developers to design features and interfaces to our network without disrupting it. Think of DMR-MARC as the stable version of the platform and the DMR Sandbox as the developmental version. However, if you want the local, statewide, regional, national, and international talkgroups you'll want to stay with DMR-MARC. The DMR Sandbox does not allow cross patches into stable networks. It is purely a developers playground.

  • Calibrate your Audio with the help of NorCal DMR. You must use Google Chrome for this utility. Just key up on TS1 TG9999 to use it. Right now, this is only available on a few bridges including the DMR-MARC core bridges. So, if your audio does not work, contact Tim, K6BIV and request a CC connnection from NorCal to your bridge. We are using a 2 min time out timer on DMR-MARC core bridges.

  • We are excited to announce a new Worldwide French Talkgroup 11. This talkgroup is available in France, the Montreal area, and areas near Geneva Switzerland.

  • DMR-MARC is proud to announce the launch of our Worldwide Portuguese talkgroup (15)! These new talkgroups are in addition to the English (3), Spanish (14), Dutch (22), German (20), Italian (222), Finnish (244), and Swedish (240) talkgroups that we offer. DMR-MARC is committed to building relationships with native languages and making your user experience enjoyable as it can be. Contact Us if you would like to be connected to any of these talkgroups.

  • North American, European, Australia-New Zealand, and African versions of the CPS Contacts List Generator are now functional. Check under Member Toolbox.

  • Read all about DMR in Great Britain in the November 2013 issue of RADCOM

  • 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

  • Windsor hams demonstrate DMR at Field Day 2013.

  • 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

  • See our movie star, Dave K3UCB, at Dayton for an interview with Ham Radio Now

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 R02.40.12
    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 8515
    SmartPTT Server and Dispatcher 8.4

  • Are you experiencing packet loss from DMR-MARC? Well, stop and read this and you may understand the bigger reason why and it's not our fault. In fact, we have designed a workaround for World and NAm feeds for those bridges that face the UDP throttling. Note: this is not just a Cogent and Verizon issue. Other ISPs are causing similar headaches. Contact Us if you need help. Please be sure to voice your complaints with your local ISP and Cogent. Tell them to stop throttling packets.

  • IMPORTANT!!   Repeater Firmware R02.40.12 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.

  • We have launched regional talkgroups. These talkgroups are only be available for contacts within the region. If you are outside the region you must use TG3 North America or UA113/123 for region to region contacts, just like before. Note: Your master repeater's location dictates if you have access to the regional talkgroup. For example, peers of K9MOT have access to the Midwest Talkgroup, peers of NE1B have access to the Northeast talkgroup, peers of the RMHR and NoCo groups have access to the Mountain talkgroup, peers of Norcal, Arizona, and Hawaii have access to the Southwest talkgroup, etc.

  • Regional Talk Group Status:
    Talkgroup Name Group Call Activation
    Northeast 3172
    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.

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    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!