tvengr
Well Known Member
If there a default talkgroup ID for Dual Slot Direct Mode? Thanks!
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Dual Slot Direct Mode
- Thread starter tvengr
- Start date
Josh
Member
Not sure about any "default"... the talkgroup ID will be whatever the receiving radio is set to.
tvengr
Well Known Member
Thank you! I have the understanding that a talkgroup ID is not required and that 2 talkgroups can be selected by slot only. There are DMR conventional frequencies in the RR database that do not have talkgroup ID's shown and the 2 talkgroups are selected by slot only. On Uniden scanners, there is no way to enter talkgroups without a known talkgroup ID. ID Search does not help since you cannot have 2 separate talkgroups with alpha tags for the 2 slots.
If you don't define a call type under "SelCall on PTT," the radio will transmit a DMR unaddressed call. Any transceiver monitoring the same frequency, color code, and timeslot as the unaddressed transmission should receive the call, irrespective of whatever (if any) group IDs are defined in the corresponding group ID list. So, if you don't define a TX talkgroup, your "default talkgroup" is the unaddressed call.
Note that Motorola's behavior when you don't define a TX talkgroup is different - the radio simply won't transmit. You have to make a contact, set it up as a Digital All Call, and assign it as the TX contact for the channel to achieve the same thing.
The DMR all call talkgroup ID is 16777215, I believe the unaddressed call ID that Kenwood defaults to is the same, but haven't tested that to confirm.
Note that Motorola's behavior when you don't define a TX talkgroup is different - the radio simply won't transmit. You have to make a contact, set it up as a Digital All Call, and assign it as the TX contact for the channel to achieve the same thing.
The DMR all call talkgroup ID is 16777215, I believe the unaddressed call ID that Kenwood defaults to is the same, but haven't tested that to confirm.
tvengr
Well Known Member
Thank you! I will have to give that a try if I can find a frequency in my area without any talkgroup ID's.
Not true. When we first started putting DMR Kenwood's into existing systems, I found real quick that Kenwood doesn't default a TG on DMR, just like they don't on NXDN. That would not work with the Vertex EVX radios that were already out there, since Vertex defaulted DMR to TG 1 for everything, and there was no way to remove it. So the KW's could talk to each other, and would hear the Vertex's, but the Vertex's could not hear the Kenwoods.
So yes, you have to define a TG that matches existing radios to put KW's into an existing system of radios.
There is an ALLCALL setting that can be used, which will be heard by anyone on that RF channel and color code, but you won't hear them unless they respond on that same ALLCALL TG.
So yes, you have to define a TG that matches existing radios to put KW's into an existing system of radios.
There is an ALLCALL setting that can be used, which will be heard by anyone on that RF channel and color code, but you won't hear them unless they respond on that same ALLCALL TG.
tvengr
Well Known Member
Thank you very much! There appears to be no way to program DMR talkgroups by slot only when using Uniden scanners. There needs to be a TGID wildcard added to the firmware.
