BCD325P2/BCD996P2: DMR OFT Question

[tvengr]

How do you program DMR OFT where the database shows any TGID and the 2 talkgroups are selected by slot only? A TGID is needed to enter an alpha tag. Thanks!

 

[sallen07]

How do you program DMR OFT where the database shows any TGID and the 2 talkgroups are selected by slot only? A TGID is needed to enter an alpha tag. Thanks!

Is there a specific system in the database you are talking about?

 

[tvengr]

Frequency	License	Type	Tone	Alpha Tag	Description	Mode	Tag
151.4075	WQPN446	RM	CC 10 TG * SL 1	PC-911 OPS 1	911 District Operations 1	DMR	Emergency Ops
151.4075	WQPN446	RM	CC 10 TG * SL 2	PC-911 OPS 2	911 District Operations 2	DMR	Emergency Ops

 

[Whiskey3JMC]

Assuming either TGID can surface on either slot: You can still program each TGID and name it, just keep "set TDMA slot" set to "Both". If neither TGID is known then turn on ID Search to get them

 

[sallen07]

If you are required to have a TGID, just create a dummy one with any name and value you want, then turn on "ID search" on the system.

 

[tvengr]

Assuming either TGID can surface on either slot:

Thank you! The database shows each talkgroup is only on a specific slot.

 

[Whiskey3JMC]

Thank you! The database shows each talkgroup is only on a specific slot.

OK then if you know them, program them and name them. Then set TDMA slot to their applicable slot

 

[sallen07]

OK then if you know them, program them and name them. Then set TDMA slot to their applicable slot

That will be challenging without the TG numbers, which the database does not list.

 

[tvengr]

If you are required to have a TGID, just create a dummy one with any name and value you want, then turn on "ID search" on the system.

If you are not within range of the system, it's not possible to do an ID Search to find TGID's. Is it possible to program a DMR radio by frequency, color code, and slot only? I don't know.

 

[sallen07]

If you are not within range of the system, it's not possible to do an ID Search to find TGID's. Is it possible to program a DMR radio by frequency, color code, and slot only? I don't know.

I don't understand the first sentence. If you are not in range of the system, then what's the point? What difference does it make how something you cannot monitor is programmed? If you are trying to program this for someone else, then they will have to watch for the TGIDs if they care and report back to you. If they just want to listen to the traffic, then ID Search will do just fine.

Most if not all Part 97 DMR radios have a promiscuous mode where you will hear ANY traffic on a frequency, with no regard to CC, slot, or TGID. You won't find that in commercial radios.

 

[Whiskey3JMC]

That will be challenging without the TG numbers, which the database does not list.

ID search makes it easy

If you are not within range of the system, it's not possible to do an ID Search to find TGID's. Is it possible to program a DMR radio by frequency, color code, and slot only? I don't know.

You don't need to be within range to simply turn on ID search for the sole purpose of programming a system. Turn it on, program everything else in. Next time you're in range, gather the TGIDs and what slot they're on and modify your system accordingly

 

[tvengr]

You don't need to be within range to simply turn on ID search for the sole purpose of programming a system. Turn it on, program everything else in. Next time you're in range, gather the TGIDs and what slot they're on and modify your system accordingly

I am interested in being able to help someone else program the system. As I stated earlier, I don't know if it is possible to program a DMR talkgroup without a TGID into a commercial radio and select 2 talkgroups by slot only. Whether it is possible or not, it would be helpful to allow programming a wildcard TGID for talkgroups in a future firmware update for scanners. Thanks for everyone's help. I don't believe there is presently a way to select talkgroups by slot only.

 

[Whiskey3JMC]

As I stated earlier, I don't know if it is possible to program a DMR talkgroup without a TGID into a commercial radio and select 2 talkgroups by slot only.

Commercial radio, got it. Your "BCD996P2" prefix is a bit misleading...

 

[tvengr]

Commercial radio, got it. Your "BCD996P2" prefix is a bit misleading...

The question is for scanners. I don't see any way to program alpha tags without a known TGID and select by slot only. I was just stating that I do not know if it is possible to program talkgroups into a DMR commercial radio without TGID's and select 2 talkgroups by slot only as shown in the database. I don't know if the person submitting to the database did an ID Search.

 

[sallen07]

I believe you are right ... no way to put in a separate alpha tag for each TS if you don't know the TGIDs. Pretty sure whoever did the submission didn't search for the TGIDs. I don't consider myself an expert on DMR but I know enough to be fairly certain there *has* to be a TGID in order to transmit.

 

[tvengr]

I believe you are right ... no way to put in a separate alpha tag for each TS if you don't know the TGIDs. Pretty sure whoever did the submission didn't search for the TGIDs. I don't consider myself an expert on DMR but I know enough to be fairly certain there *has* to be a TGID in order to transmit.

I have been informed that Kenwood DMR radios have a Dual Slot Direct Mode where radios can be programmed using slots only. Scanners need to have a wildcard TGID available to be able to program in that mode.

 

[hiegtx]

ID Search would get any TGID in use, and logging would help confirm the slot used for any TGID received. The most common "default" TGID I've seen is simply 1 Some of the smaller towns, using DMR for public safety, often use the same TGID, like 1, for both PD & FD, with slot specified for each department.

 

[tvengr]

ID Search would get any TGID in use,

That is true, but it will not help if the radio uses slots only (Dual Slot Direct Mode on Kenwood DMR radios).

 

[hiegtx]

That is true, but it will not help if the radio uses slots only (Dual Slot Direct Mode on Kenwood DMR radios).

I wonder if the scanner will simply treat that as TGID 1, even though no actual TGID was transmitted.

 

[tvengr]

I wonder if the scanner will simply treat that as TGID 1, even though no actual TGID was transmitted.

I'm waiting for a reply if there is a default talkgroup when using Dual Slot Direct Mode.