The DMR-MARC Worldwide Network

Our network is an all-digital group of MOTOTRBO DMR repeaters in the USA, Germany, Australia, South Africa, New Zealand, Canada, Switzerland, Spain, Austria, and Finland. We are all amateur radio operators many of whom are Motorola Solutions employees, Motorola Service Station employees, dealers, system installers, and Motorola equipment aficionados.

All repeaters on our network are connected all the time. TRBO radios have great voice quality, great coverage, and extended battery life all in HALF the channel bandwidth of a traditional analog FM repeater. Isn't time you upgraded to digital radio's cutting edge?

Latest News

New Repeaters on the network

• VK4RMC Brisbane, Australia
• VK4RXX Gold Coast, Australia
• WH6TF Kapaa, HI
• K3OCM Baltimore, MD
• VE3NMZ London, ON (DCI)
• W1NGS Holliston (Boston), MA (NorCal)
• OH2RCH Espoo, Finland




Other Interesting Items

• Read Yaesu's plans to manufacture DMR radios!
• Here's how the contact lists work: North Am. is for users of North American CPS. Euro/Afr./ANZ is for users of Europe, Africa, or Australia/New Zealand versions of CPS. BOTH versions contain WORLDWIDE contacts. You can only use the version that is compatible with your region's CPS.
• Check out the new EMEA contact list under Member Toolbox. Thanks to Oliver, F1UOT.




2012 Dayton Hamvention Repeater & Activities

• Subscriber RX: 443.75, TX: 448.75, Color Code 1
• Time Slot 1, Group Call ID 1: World
• Time Slot 1, Group Call ID 3: English Language Countries
• Time Slot 2, Group Call ID 2: Local
• We will have an informational indoor booth located at EH-509.
• We'll also have the Motorola Labs truck in the West lot outside.
• PLEASE contact NE1B to volunteer to help.
• ALSO.. the DCI network plans to have their repeater active. DCI is one of our bridge partners.

Network Update

• ALL USERS, IMPORTANT NEWS! READ THE FOLLOWING!! Mandatory use of talk group ID 3 on time slot 1 will be required for all N. American and South Pacific traffic beginning 1 MAY 2012. Group call ID 1 will only be used for the weekly nets and intercontinental traffic from Europe to North America/South Pacific. PLEASE READ the details here
• The USA masters have been upgraded to R01.08.12. We ask that all repeater trustees and bridge partners upgrade to that version. Please do NOT upgrade to R01.09.00 yet. We will email the group when/if we determine it is in the best interest of the network.
• ALL users of DMR-MARC should try to upgrade to subscriber firmware version R01.08.32 as soon as possible. Your mobile and portable radio must be upgraded to a version of firmware newer than R01.06.00 to use DMR-MARC. The c-bridge does not support earlier versions and you will miss segments of calls.
• BREAKING NEWS: The c-Bridge Controllers now support a form of Call Arbitration. This helps to prevent two or more users from 'doubling' when transmitting (transmitting on top of each other), when each one is on separate systems in the network. This Call Arbitration method makes use of the Transmit Interrupt functionality in the MOTOTRBO radios. To use this, the following two functions should be enabled (checked in the CPS): Allow Interruption, Enhanced Channel Access
  If two users transmit at about the same time, the one that started transmitting first will be given the 'floor'. Anyone else that started transmitting after the first one, will hear a tone in their radio speaker and their radio will stop transmitting. As soon as they let up on their PTT button, they'll hear the transmission from the other unit in progress.
  - John Rayfield, Jr. CETma, WØPM
• 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.
• Please make sure you read the radio programming instructions before transmitting on the network!
• We now have 7 masters on the network and are connecting them via the C-bridge & Smart PTT. This frees up more room for expansion and enhances network robustness by eliminating a single failure point.

Future Locations on our Network

• Grand Rapids, MI
• Port Moresby, Papua New Guinea
• Penang, Malaysia
• Are you in the U.S., Canada, U.K., Australia, New Zealand, or South Africa? Do you have a coordinated repeater pair, a repeater site identified, and high speed access? Would you like to be our newest network affiliate? Contact us using the link at the top of this page.