Conventional Interop on SAFE-T??

[james812]

Hello all.... I learned a lot from here and been reading, but haven't seen this discussed, if it was sorry i missed it... I also tried in the SAFE-T discussion forum but got passed over....w/o a good answer

What does everyone do with this freqs in the RR database under SAFE_T Conventional Interop? I have a 396

Do this get put in a a seperate system??? or what exactly do most of you guys do with them?

an example of one that I might need?

ISP Statewide

Frequency Input
Type Tone Alpha Tag Description Mode Tag
855.23750 855.23750 M 192.8 PL T/A 800Mhz Talkaround FM Interop


ISP District 34 Jasper

Frequency Input
Type Tone Alpha Tag Description Mode Tag
866.01250 821.01250 RM 156.7 PL CALL Calling (French Lick, Leopold Sites) Interop
867.01250 822.01250 RM 156.7 PL TAC2 Tactical 2 (French Lick Site) FM Interop
868.01250 823.01250 RM 156.7 PL TAC4 Tactical 4 (Leopold Site) FM Interop

Can someone explain exactly what these are? and where to put them?

Thanks soooo much....everyone in the Indiana forum is great!

 

[DiGiTaLD]

Conventional Interoperability

They are just what they are described as: conventional interoperability. They are there to allow interoperability using conventional analog mode both through repeaters and short-rage direct radio-to-radio. Conventional analog is something all 800 MHz gear should support, regardless of manufacturer, so these are the basic interoperability means through which that can be accomplished, and can also act as a fallback if segments of SAFE-T or another local 800 MHz system should fail.

For instance, if a user of the Hamilton County EDACS system with a GE/Ericsson/M/A Com radio wanted to talk to a user of the Indianapolis-Marion County P25 system with a Motorola radio, it would be possible for them to switch to one of the various ICALL/ITAC channels and go direct radio-to-radio or through a repeater in conventional analog mode, thereby breaking all the barriers of trunking protocols and systems because when using these frequencies, they aren't using a trunking system. Does this ever happen? Probably not, but it is entirely possible.

They have no connection to the SAFE-T network at all, other than they are licensed to and operated by the state, and the repeaters are often co-located with SAFE-T sites. The frequencies are the NPSPAC allocations recognized nationwide as conventional 800 MHz interoperability channels.

The CALL and TAC channels have repeaters on them at various locations around the state (see the map). The repeater output frequencies (frequency you'd listen to on a radio or scanner) can also be used in direct radio-to-radio mode as well anywhere. There is also a statewide conventional talkaround channel that as far as I know is unique to Indiana and is not part of the standard national NPSPAC plan.

All you need to do to monitor these is program the following frequencies and PL tones as conventional (non-trunked) channels in your scanner:

866.0125 PL 156.7 (ICALL Repeater and Direct)
866.5125 PL 156.7 (ITAC1 Repeater and Direct)
867.0125 PL 156.7 (ITAC2 Repeater and Direct)
867.5125 PL 156.7 (ITAC3 Repeater and Direct)
868.0125 PL 156.7 (ITAC4 Repeater and Direct)
855.2375 PL 192.8 (Statewide Talkaround)

Looking at the map will give you an idea of what NPSPAC repeater is in your area. You probably won't hear much activity on them. A few local officers used the statewide talkaround channel for communications at football games this past fall, and once I heard some activity on one of the Indianapolis repeaters that sounded like officers working a football game as well, but that's been pretty much it from my location. The local FDs in this area use ITAC4 direct occasionally when they don't have good coverage through SAFE-T on a fireground.

Generally, I would describe these channels as underutilized, but that is no reason not to monitor them.

 

[jerk]

Hello all.... I learned a lot from here and been reading, but haven't seen this discussed, if it was sorry i missed it... I also tried in the SAFE-T discussion forum but got passed over....w/o a good answer

What does everyone do with this freqs in the RR database under SAFE_T Conventional Interop? I have a 396

Do this get put in a a seperate system??? or what exactly do most of you guys do with them?

an example of one that I might need?
ISP Statewide
Frequency Input
Type Tone Alpha Tag Description Mode Tag
855.23750 855.23750 M 192.8 PL T/A 800Mhz Talkaround FM Interop

ISP District 34 Jasper
Frequency Input
Type Tone Alpha Tag Description Mode Tag
866.01250 821.01250 RM 156.7 PL CALL Calling (French Lick, Leopold Sites) Interop
867.01250 822.01250 RM 156.7 PL TAC2 Tactical 2 (French Lick Site) FM Interop
868.01250 823.01250 RM 156.7 PL TAC4 Tactical 4 (Leopold Site) FM Interop

Can someone explain exactly what these are? and where to put them?
Thanks soooo much....everyone in the Indiana forum is great!

In Post 653 of the Safe-T thread your other post was answered. And then at the bottom of the RR database page, there is a link that provides more information, and then you can go to IPSC (Safe-T) website and read the user policies.
http://www.radioreference.com/forums/showthread.php?t=22362&page=33

 

[AK9R]

What does everyone do with this freqs in the RR database under SAFE_T Conventional Interop? I have a 396

Program them as a separate system.

Each SAFE-T tower site has a trunking controller along with receivers and transmitters for the trunked channels assigned to that site. The trunked channels and talkgroups are programmed in your scanner as a trunked system.

The sites that have conventional interop channels assigned to them also have conventional non-trunked repeaters for those interop channels. These repeaters work just like a conventional repeater on VHF or UHF. What the receiver hears on the receive frequency is repeated on the transmit frequency without going through the trunking controller. There may be more to the story, but that's the simple answer.

Do this get put in a a seperate system??? or what exactly do most of you guys do with them?

Yes, they have to be programmed in your scanner as a separate, conventional, non-trunked system.

ISP Statewide
855.23750 855.23750 M 192.8 PL T/A 800Mhz Talkaround FM Interop

This is a statewide simplex talkaround channel.

ISP District 34 Jasper
866.01250 821.01250 RM 156.7 PL CALL Calling (French Lick, Leopold Sites) Interop867.01250 822.01250 RM 156.7 PL TAC2 Tactical 2 (French Lick Site) FM Interop
868.01250 823.01250 RM 156.7 PL TAC4 Tactical 4 (Leopold Site) FM Interop

These are repeater channels. Program just the output frequencies (866-868 MHz).

 

[DiGiTaLD]

NPSPAC Protocol

I just heard ISP 41-44 trying to contact the Connersville post on TAC1. It must have been the Indianapolis TAC1 repeater because there is no TAC1 repeater in the Connersville district according to the IPSC-published map and database. He received no answer and probably switched to another channel or talkgroup and made contact there, but it was interesting nonetheless. This is the first time I've heard an ISP unit calling a post on one of the NPSPAC repeaters.

It just makes me wonder, do the ISP posts monitor these (are they supposed to) regularly, just like Point, ILEEN, and their respective regional and statewide interop talkgroups on SAFE-T? Anybody know?

TIA.

 

[usswood]

866.0125 PL 156.7 (ICALL Repeater and Direct)
866.5125 PL 156.7 (ITAC1 Repeater and Direct)
867.0125 PL 156.7 (ITAC2 Repeater and Direct)
867.5125 PL 156.7 (ITAC3 Repeater and Direct)
868.0125 PL 156.7 (ITAC4 Repeater and Direct)
855.2375 PL 192.8 (Statewide Talkaround)

I listen to Terre Haute City SRT using ITAC 4 in DIRECT MODE the other night. I am almost for sure it was Sunday night. From what I could hear they were doing Hostage situation training. But I know for sure it was THPD because of the Car numbers used and I know some of the voices I heard personally. Was very interesting listening to them in the CLEAR for a change...Comms were weak at times at my location so I don't know if there were training with another department or not (since they were on the ITAC Freq's).

Anyone else catch any of that??