DMR Site Information

Rocky Mountain Ham Radio’s DMR Network Information as of 5/9/2020

SPECIAL NOTE:  Private calling, texting, DPRS/APRS/GPS Location Services should never be used on the RMHAM network.  Only our Brandmeister  repeaters on talkgroups specifically allocated for APRS/DPRS/GPS activity should be used for this. Please note that autonomous (GPS/Text or data) transmissions must be identified with your FCC callsign.  An ID number isn’t a legal identification.

Sample Codeplugs for several radios are available in the menu above under DMR Network.

Full Time DMR Sites in the RMHAM Network

Rocky Mountain Ham Radio Talk Groups

We will be using the following talk groups on the RMHAM Network.  Note that we ONLY support these talkgroups on our statewide network. No push to talk talkgroup selection is available on the RMHAM network.

Rocky Mountain Wide Network – Talk Group 700

The Rocky Mountain Wide network will provide extremely wide area coverage across much of Colorado.   No Data, Texting or locations services are allowed.  No Brandmeister Connectivity.  Repeaters supporting this talk group are:

Eastern Colorado Regional Network (NEW!) – Talkgroup 705

This talkgroup has been set up to allow data.  We are allowing experimentation with data and texting on this talkgroup and repeaters only. The rest of the RMHAM network is strictly off limits for data, texting and GPS.  Because the DMR protocol does not contain a legal ID, you must manually identify your station every 10 minutes.

Central Colorado Regional Network (Formerly Denver) – Talk Group 720

A regional network supporting the Central Colorado area using Talk Group 720.   As a test, this network can be accessed via the Brandmeister via talkgroup 310801.  There is no outbound connectivity back to Brandmeister!  No Data, Texting or GPS allowed. Repeaters supporting this talk group are:

Northern Colorado Regional Network (No CO) – Talk Group 721

A regional network supporting Northern Colorado is established using Talk Group 721.  No Data, Texting or GPS.  Repeaters supporting this talk group are:

New Mexico Regional Talkgroup (NM) NEW! – Talk Group 505

A regional network supporting all repeaters in New Mexico.  No data, texting or GPS.  Repeaters supporting this talk group are:

Southern Colorado Regional Network (So CO) – Talk Group 719

A regional network supporting Southern Colorado is being established using Talk Group 719.  No Data, Texting or GPS.  Repeaters supporting this talk group are:

Four Corners Regional Network (4Corners) NEW! – Talk Group 745

A regional network supporting the Four Corners region, SW Colorado, NW New Mexico, SE Utah and NE New Mexico.  No data, texting or GPS allowed on this talk group.  Repeaters supporting this talkgroup are:

Local Only Talk Groups

Local Talkgroups are supporting the areas near the repeaters listed.  These are not linked talkgroups and are standalone repeaters. No Data,Texting or GPS.

Microwave Network

Rocky Mountain Ham Radio has built and operates a microwave network covering three states.  Our microwave link system covers throughout the Front Range from Wyoming to the Albuquerque and West to Vail to interconnect our radio sites on Amateur Radio frequencies and not be reliant on the commercial Internet as much as possible.  We’ve linked of our front range sites and are working to add others as quickly as the funds and time will allow. Rocky Mountain Ham Radio is an IRS 501(c)(3) Charitable Organization. Any donations you may care to make are fully tax deductible.

If you have access to a radio site and internet access and would be willing to assist us in creating and managing this network, please contact us and discuss what we can do to make this happen. We would like to create the network around the state, but we’re not building overlapping coverage.  If you have a site, and it makes sense for us to deploy there, we will see what we can do!

DMR Legality on the Ham Bands

The FCC has allowed DMR on the amateur bands by allowing the emission type specified for DMR. 7K60FXE is now allowed in Part 97.

Please note:  Certain autonomous features (like GPS positions and data transmissions) are definitely not allowed since there’s no way to transmit a FCC Legal Identification every 10 minutes as required.  Encryption is never allowed in part 97 and must not be used on DMR or any other mode.

Excerpt from §97.119 Station identification:

(a) Each amateur station, except a space station or telecommand station, must transmit its assigned call sign on its transmitting channel at the end of each communication, and at least every 10 minutes during a communication, for the purpose of clearly making the source of the transmissions from the station known to those receiving the transmissions. No station may transmit unidentified communications or signals, or transmit as the station call sign, any call sign not authorized to the station.

FCC GRANTS WAIVER:  March 22, 2013 the FCC Granted the ARRL’s  petition for a waiver to the commissions rules regarding the use of single slot TDMA on the ham bands pending permanent rulemaking proceedings on the subject.  The full order is here for your perusal.