Differences

This shows you the differences between two versions of the page.

--- dmr_administration [2017/01/13 11:33]
kd6kpc [Editing a Repeater's Assigned Talk Groups]
+++ dmr_administration [2018/01/20 14:16]
kd6kpc [Nomenclature]
@@ Line 13: / Line 13: @@
 Repeaterbook attempts to gather the information needed for Hams to create their own code plugs.
+==== Nomenclature ====
+On Repeaterbook.com, we use certain nomenclature that matches the DMR community to reduce the probability of confusion. it is important to know these terms and what they mean.
+=== Wide Network ===
+This is the flavor of the DMR system. There are three different flavors, DMR-MARC, DMRplus (DMR+), and BrandMeister. The architecture of each is a little bit different. We track the Wide Network because it influences the architecture of a client-radio codeplug.
+=== Local Network ===
+A local network is a group of repeaters that have very similar talk groups. They tend to be linked to each other through the talk groups in various ways and connect to the same c-bridge.
+=== c-Bridge ===
+This is like a server. The Local Networks connect to the c-bridge which handles the routing of talk groups. The c-bridge can route talk groups to other repeaters within the same local network or send it out to other c-bridges or even cross over to other Wide Networks.
 ==== Editing a Repeater's Assigned Talk Groups ====
-When editing a repeater, whether with or without a user request submission, there is a with a link to Manage Talk Groups. Click this link and a new window will appear.
+First of all, you need to understand what a talk group is and why DMR repeaters use them. Talk groups are not just used on DMR repeaters, but also exist on P-25 and other repeater digital modes. Essentially, a talk group is a channel within a channel. The talk groups are assigned a numerical code and when all of the other radios are "tuned" or listening for that particular talk group code, or ID, when someone talks they all listen. A radio tuned to the same repeater frequency and not listening for that talk group ID may not hear anything (the only time you would hear something is if you had your radio set to listed to all conversations, regardless of the talk group.).
+Since DMR repeaters are typically linked to centralized computer hubs, called c-bridges, using talk groups allows repeaters without a user actually monitoring a talk group to remain quiet. An exception is if a repeater has programmed that talk group to be full-time or only activated by PTT.
+So, another caveat to the talk groups is the full-time vs. PTT monitoring. Repeaters have the option of monitoring and repeating all traffic for a talk group all the time. Usually, owners will program a talk group to only be monitored when a user requests it. This can really cut down on the chatter and is a common setting for very large area talk groups, like the Worldwide talk group. For a user to use that channel, they bring up that talk group on their radio and key the radio. This will send a message to the repeater to begin actively monitoring that talk group. This is the same in concept to dialing up an AllStar room, IRLP node, EchoLink node, etc. The repeaters are also set up with a hold off timer which is how long the repeater will listed to that talk group without hearing a local key up. Repeaterbook does not track hold off timers.
+The final caveat to a talk group is the time slot the talk group is on. DMR repeaters can actually handle two conversations at once, one on time slot one and one on time slot two. This concept would seem impossible for users of analog repeaters because doubling would occur. However, DMR repeaters can "hear" two radios at once on two different time slots. Essentially, the packets a radio sends when keyed up identify if the radio is on time slot one and time slot two, The repeater then accepts these packets, stitches them together, and sends them on to the correct time slot and talk group. DMR repeaters actually don't allow doubling and can reject a transmission from a radio when the time slot is already in use.
-From this window, you have two options. One is to Add a Network and the other is to Add a Talk group. You should add the Network if you know what it is.
+So, to add a talk group to a repeater, you need, at minimum, the time slot and the talk group. You can enter the talk group info without the access (full-time vs. PTT), but users appreciate this information. With this data, you can edit a repeater from the "manage talk group" link.
+From the new window that appears, you have three options. One is to Add a Network, Add a Single Talk group, or Bulk Add. You should add the Network (c-bridge) if you know what it is.
 === Networks ===
@@ Line 78: / Line 98: @@
 The network then can be clicked to be taken to the list of all of the repeaters within that network.
-Individual talk groups within the database cannot be edited, added, or deleted from the database. Only the site admin can do this. Requests are made from the Forum so that all admins that have subscribed to the DMR Forum can weigh in on the change.
+Only admins that have a high-proficiency with DMR have access to edit, add, or delete talk groups from the master databases. Requests are made from the Forum so that all admins that have subscribed to the DMR Forum can weigh in on the change.
 https://www.repeaterbook.com/index.php/forum/dmr-admin

RepeaterBook Wiki

User Tools

Site Tools

Differences

Page Tools