XPR 7550e for Single-Site Business

[MFG_rrt]

We have some XPR 7550e radios that were once used on a connect plus system that the business no longer pays for. I wanted to program the radios for simplex to use on the 5 frequencies that our business license is granted at our one site for inter-company communication. I'm not used to mototrbo and I'm not sure what the best way to program them is.

I have some questions if anyone could help with I would greatly appreciate it.

1. Do MDC, Quick-Call, Phone, and Text Messages only work if you are using a digital system?
2. Does every radio need a Digital Contact that they want to be able to talk to, or will simply selecting a Channel allow anyone to talk on it?
3. Does every radio need a RX Group List?

Any other general basic info would be greatly appreciated.

Thanks

 

[Flyham]

From what I think I know and remember..........replies "in-line".

We have some XPR 7550e radios that were once used on a connect plus system that the business no longer pays for. I wanted to program the radios for simplex to use on the 5 frequencies that our business license is granted at our one site for inter-company communication. I'm not used to mototrbo and I'm not sure what the best way to program them is.

I have some questions if anyone could help with I would greatly appreciate it.

1. Do MDC, Quick-Call, Phone, and Text Messages only work if you are using a digital system? ------- MDC and Quick-Call are FM analog. Not sure about Phone and text messages will work on both DMR repeated and DMR simplex.

2. Does every radio need a Digital Contact that they want to be able to talk to, or will simply selecting a Channel allow anyone to talk on it?
------ The radio itself may default to radio contact # 1. DMR channels (rather repeated or simplex) will need a TG number to identify that channel..if being used in digital mode.

3.Does every radio need a RX Group List?
------ Not necessarily.

Any other general basic info would be greatly appreciated.

Thanks

 

[K2NEC]

We have some XPR 7550e radios that were once used on a connect plus system that the business no longer pays for. I wanted to program the radios for simplex to use on the 5 frequencies that our business license is granted at our one site for inter-company communication. I'm not used to mototrbo and I'm not sure what the best way to program them is.

I have some questions if anyone could help with I would greatly appreciate it.

1. Do MDC, Quick-Call, Phone, and Text Messages only work if you are using a digital system?
2. Does every radio need a Digital Contact that they want to be able to talk to, or will simply selecting a Channel allow anyone to talk on it?
3. Does every radio need a RX Group List?

Any other general basic info would be greatly appreciated.

Thanks

1. MDC only works in analog mode, text messaging only in digital
2. Yes, you need to have a contact
3. Not if you have a tx contact setup

 

[MFG_rrt]

I guess what I really don't understand is how DMR works with these radios without a repeater system. Is my understand correct in that you can have multiple talk groups using the same frequency talking at the same time? I'm just trying to understand what the best way to program them to create the following environment:

- Have talk groups for Production, Quality, Warehouse, Admin
- Allow users to call directly to other users
- Allow users to change between talk groups

Is that all accomplished with zones/channels in Analog or does that have to be setup in Digital; and if it's in digital will that scenario work on simplex without a repeater?

 

[K2NEC]

I'm going to try to keep this as simple as possible.

If you have a group call on your radios, everyone in that "group" can talk on that channel. Then you can also accomplish a private call which means you call a radio directly based on the radio ID.

TG101=production
TG102=Quality
TG103=Warehouse
TG104=Admin
That's the easiest way to do things
Then each TG gets assigned a channel. So 101 would be channel 1, 102 would be channel 2, etc etc
A private call can be used to call another radio directly. As long as the contact is programmed into the radio, it's a super simple process

 

[MFG_rrt]

I'm going to try to keep this as simple as possible.

If you have a group call on your radios, everyone in that "group" can talk on that channel. Then you can also accomplish a private call which means you call a radio directly based on the radio ID.

TG101=production
TG102=Quality
TG103=Warehouse
TG104=Admin
That's the easiest way to do things
Then each TG gets assigned a channel. So 101 would be channel 1, 102 would be channel 2, etc etc
A private call can be used to call another radio directly. As long as the contact is programmed into the radio, it's a super simple process

Thanks for the reply. So does a private call utilize the same TG channel?

 

[K2NEC]

Yes

 

[CanesFan95]

How about just using analog simplex?

 

[N5XPM]

I would suggest starting simple like scanna said. Get an FCC license and start out analog simplex. Then experiment with DMR and other enhancements.

 

[alcahuete]

I would suggest starting simple like scanna said. Get an FCC license and start out analog simplex. Then experiment with DMR and other enhancements.

They already have a license. The next logical step would be to determine if that license covers DMR emissions. They were using these radios on a paid Connect Plus sytem, which very likely used somebody else's license.

Assuming the license covers DMR, there is absolutely no reason to use analog simplex. Absolutely use DMR and reap the benefit of digital.

 

[Floridarailfanning]

To build on what @alcahuete mentioned above, when you were using the Connect Plus system you were almost certainly operating under the SMRs authorization, so to legally operate separately from them your company needs its own license.

If your company does have its own Part 90 license, you need to review your allowed frequencies, locations, output power, and emissions and become acquainted with that information. You can then use that information as a template for how to configure the radios.

The way I would do it (which is certainly not the only way to do it) would be by designating 1 talkgroup to each frequency like the way @K2NEC lists unless the license allows control stations (FX1). If those are permitted then I would use Dual Capacity Direct with the control station acting as the timing source. This would let you use 2 frequencies for all 4 of your channels and would make scanning more efficient.

 

[MFG_rrt]

Thanks for all the info. I'll start by learning more about our current license permissions, mainly understanding the emissions types since the rest I can understand. From there I'll probably just start by using one talk group per frequency since we have 5 frequencies registered. I'll go from there. Thanks again!

 

[MFG_rrt]

Actually with just one quick search I now know that our license is approved for:

• 7K60FXD ( 2-slot DMR (Motorola MOTOTRBO) TDMA data )
• 7K60FXE ( 2-slot DMR (Motorola MOTOTRBO) TDMA voice )
• 7K60F1D (I can't find)
• 7K60F1E (I can't find)

All for 100w ERP with up to 25 mobile stations.