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, Finland, Sweden, Italy, Mexico and the United Kingdom. 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?

New Repeaters on the network

• W8AK Dayton (Northwest), OH
• K3ARL Bellefonte, PA
• VE3UUU Windsor, ON
• GB7TD Wakefield, England
• VK4RTW Toowoomba, QLD Australia
• W2GLD Pinckney, MI
• AA9VI Northbrook, IL
• NF6C Seattle, WA
• XE3RCC Cancun, Mexico
• IRØUGO Rome, Italy
• VA2RLD St-Calixte, QC
• NØSZ Boulder, CO
• VA3XPR Toronto (downtown), ON
• K1IMD Mattituck, NY
• VE3BNI Milton (Toronto West), ON




Dayton Hamvention Updates

• Wide area repeaters (Color Code 1, +5.0 MHz offset)
  Hamvention/Northwest Dayton: W8AK, 442.875
  Southeast Dayton: W8AK, 443.75
  Slot 1, Group Call 3: North America/ South Pacific/ UK English
  Slot 1, Group Call 1: Worldwide (including Europe)
  Slot 2, Group Call 2: Local Dayton


• DMR Booth Repeater: W2XAB, 442.175 (+5.0 MHz), Color Code 1
  Slot 1, Group Call 3: North America/ South Pacific English
  Slot 1, Group Call 1: Worldwide (including Europe)
  Slot 2, Group Call 2: Local Dayton
  Slot 2, Group Call 3113: GA Statewide
  Slot 2, Group Call 3100: DCI Bridge


• TRBO Simplex: 446.075 MHz, Color Code 1, Slot 1
• Mi5 repeaters: 444.7000+ ColorCode 1 N8OBU South
  442.0875+ ColorCode 1 W8FSM North
  Primary Talkgroup will be Slot 2 Group 2 - MI5-STATEW2
  Secondary Talkgroup will be Slot 1 Group 51 - MI5-STATEW1
• Additional DMR repeaters on site.
• Indoor Booth: BA0449 , near the ARRL
• Shirts and Hats available as seen here. Complete the following order form and email to Tom, N3LHD to arrange payment via PayPal and pickup in Dayton. Shirts will not be mailed.
• Latest weather forecast and conditions




HAMRADIO 2013 Friedrichshafen, Germany Updates

• Local DMR Repeater: 439.975 (-9.4 MHz) Color Code 1
  Slot 1, Group Call 1: Worldwide
  Slot 1, Group Call 262: Germany I
  Slot 1, Group Call 20: Local
  Slot 2, Group Call 262: Germany II
  Slot 2, Group Call 232: Austria
  Slot 2, Group Call 20: Local




Featured Stories

• DMR-MARC on Amateur Radio Newsline (1 March 2013): Audio or Text
• Read all about DMR-MARC at the Ontario Science Centre. Thanks VA3XPR!
• Participate in our weekly Tech net at 0100 UTC Thursdays (9pm ET, 8pm CT, 6pm PT Weds. night) on TS1, TG3
• 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

• FIRMWARE MATRIX - We HIGHLY recommend ALL DMR-MARC trustees and bridge partners to ONLY use the below firmware. This helps minimize system incompatibilities.

  Repeaters	R01.09.11
  XPR4550,DM3601,XPR6550,DP3601 Mobiles and Portables	R01.09.10
  XPR5550,DM4601,XPR7550,DP4601,SL7550 Mobiles and Portables	R02.04.01
  C-Bridge	6913
  SmartPTT Server and Dispatcher	7.4.0.5990

• UPDATE C-bridge Code 6913 has been released. Please update your bridge. Also BE SURE YOU DO NOT have the following special escape characters in your C-bridge radio alias files: # ' ! @ { } / *
• Aussie and New Zealand stations: VK4JV now has the VK-TRBO bridge operational. Please program time slot 2 to use group call ID 5 for regional VK/ZL traffic. Time slot 1 remains the same using group call 3 for North America English and group call 1 for the entire world.
• Crystal Lake, IL is again offline. This time we have identified a poor ethernet cable to the canopy connection. The new UV-resistant line has arrived and is awaiting installation.
• ALL USERS, IMPORTANT NEWS! READ THE FOLLOWING!! Mandatory use of talk group ID 3 on time slot 1 is now required for all N. American and South Pacific traffic.. Group call ID 1 is only used for the weekly nets and intercontinental traffic from Europe to North America/South Pacific. PLEASE READ the details here
• The c-Bridge Controllers 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!




Future Locations on our Network

• Athens, Greece (Spring 2013)
• Romania (Spring 2013)
• Germantown, WI (Spring 2013)
• Chicago (South Loop), IL (TBD)
• 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. Hopefully we'll have a UK repeater on the network soon!