RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog
 

Go Back   The RadioReference.com Forums > Amateur Radio > Digital Voice for Amateur Use

Digital Voice for Amateur Use - Discuss use of digital voice technologies on the amateur radio bands. This is to include technologies such as VoIP, P25, DMR/TRBO, NXDN, D-STAR, etc.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 06-06-2017, 8:26 AM
chief21's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Mar 2004
Location: Summer - western NC mountains; Winter - central FL gulf coast
Posts: 474
Default DMR Talkgroup Questions

I'm fairly new to DMR, but with my background in trunking, I thought I had a good grasp of talkgroups. Maybe not so much.

Here's a question for the DMR experts here...

Due to my location, I have not been able to reach any of the DMR repeaters around me directly with my handheld MD-380. As a solution, I recently purchased a SharkRF OpenSpot and have since been able to access several of the wide-area talkgroups, such as TAC310, 311, and SEast. Unfortunately, however, I have had no luck at all trying to access a number of other talkgroups.

I suspect that this might be due to the different types of DMR systems (DMR-MARC, Brandmeister, etc) but the differences aren't real clear to me. In particular, there are three local/regional talkgroups that I have been unable to access - all are networked among numerous repeaters:

WNC (talkgroup 27600) - linked through 6 or 7 repeaters, but nothing heard via OpenSpot

NCPRN (talkgroup 2) - linked across several states, but when I monitor this TG, I hear hams from Ohio, Indiana, New York, etc. - nothing from NC or TN.

NAmerica (talkgroup 3) - obviously linked, but nothing heard via OpenSpot


I'd like to be able to use these (and other) talkgroups, so what are the rules on which talkgroups I can access and which I can't when using the OpenSpot? Is there a list somewhere?

Thanks in advance for suggestions.

John AC4JK
Reply With Quote
Sponsored links
  #2 (permalink)  
Old 06-06-2017, 9:09 AM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Jan 2015
Location: WNC
Posts: 37
Default

An openSPOT will only connect to Brandmeister or DMRPlus networks. The PRN and WNC Talkgroups you mentioned are a no go, but NAmerica maybe accessible thru the DMRPlus network. Goto the DMR-MARC page for more info. Basically, the WNC and PRN Talkgroups are confined to their respective C-Bridges. But I
am surprised that you can't hit a PRN or WNC-Net repeater

Last edited by CarolinasFeedNet; 06-06-2017 at 9:16 AM..
Reply With Quote
  #3 (permalink)  
Old 06-06-2017, 10:20 PM
chief21's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Mar 2004
Location: Summer - western NC mountains; Winter - central FL gulf coast
Posts: 474
Default

Quote:
Originally Posted by CarolinasFeedNet View Post
An openSPOT will only connect to Brandmeister or DMRPlus networks. The PRN and WNC Talkgroups you mentioned are a no go, but NAmerica maybe accessible thru the DMRPlus network. Goto the DMR-MARC page for more info. Basically, the WNC and PRN Talkgroups are confined to their respective C-Bridges. But I am surprised that you can't hit a PRN or WNC-Net repeater
Totally can't hit a repeater on either of those networks. I even tried hooking the MD-380 to an attic antenna but no joy.

Thanks for the information about the talkgroups. Is there somewhere I can find some lists to print out? How does one know which talkgroup numbers belong to which DMR network? There appears to be duplication in the numbers.

John AC4JK
Reply With Quote
  #4 (permalink)  
Old 06-06-2017, 10:44 PM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Jan 2015
Location: WNC
Posts: 37
Default

DMR-MARC Network is a list of DMR+ talk groups as well as DMR-MARC talk groups that are accessible via DMR+ reflectors. The best info on Brandmeister talk groups is in the explore link of the Brandmeister Live app for Android. There are many roll your own talk groups on Brandmeister so there's probably not a comprehensive list anywhere( many are based on the geographic code used to assign radio ID's however ie. 3137 NC Statewide, 3112 FL statewide, etc)
Reply With Quote
  #5 (permalink)  
Old 06-06-2017, 10:53 PM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Jan 2015
Location: WNC
Posts: 37
Default

Also make sure you have an up to date codeplug, there have been some changes over the last few months, new repeaters, frequency changes, etc
Reply With Quote
Sponsored links
  #6 (permalink)  
Old 06-07-2017, 6:22 AM
rescue161's Avatar
KE4FHH
  RadioReference Database Admininstrator
Database Admin
Amateur Radio Operator
Amateur Radio
 
Join Date: Jun 2002
Location: Hubert, NC
Posts: 2,901
Default

I'm not sure about the OpenSpot, but on the 380 (or any DMR radio for that matter) you have to make sure you select which slot the radio is using along with the correct talkgroup. So, for PRN, it would be Slot 2 and TG 2. This of course relies on you being within the coverage area of a PRN repeater.

Disregard if you knew this already.
__________________
Hams Against Magnetic Mounts
Reply With Quote
  #7 (permalink)  
Old 06-10-2017, 1:49 PM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Jun 2012
Posts: 606
Default

Another thing; many talk groups are PTT activated, which means that unless someone specifically is using it on a given repeater, you won't be heard by anyone using that system.

Sent from my XT1080 using Tapatalk
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 3:53 AM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
All information here is Copyright 2012 by RadioReference.com LLC and Lindsay C. Blanton III.Ad Management by RedTyger
Copyright 2015 by RadioReference.com LLC Privacy Policy  |  Terms and Conditions