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Trunking Radio Relay

Posted: Wed Mar 24, 2004 1:34 pm
by chiefhal3
Has anyone had any experience setting up a radio relay setup over the internet. Here is the project at hand. I am in Nashville, TN and operate on a local subscription Type I 800 trunking system. (It is totally private and we do basically what we want, no call signs, say basically what we want, just one unit to another within our company and group of friends.) I have another group of friends on a similar system down in South Georgia on the same type set up only difference is they are on Type II 800 trunking system. I would like to connect the two using some type of radio relay such as IRLP.

First, is this really practical, will it work with out long delays and interuptions? (Obviously there would be twice the pre time or connect time since both systems will have to key.) Second, can it be as simple as having a mobile set up as a base at a PC with cable internet on both ends or are we talking something much more suffisticated? We already have some extra radios we could use so now we just need the connection over the internet.

Any ideas would be appreciated.

Posted: Wed Mar 24, 2004 8:14 pm
by thebigphish
http://batboard.batlabs.com/viewtopic.php?t=24386

perhaps a mod could move this to System Infrastructure....

Posted: Wed Mar 24, 2004 9:26 pm
by EKLB
Since you mentioned it was a trunked system which would imply to me that your a subscriber the following would definately apply if it was my trunking system you were doing this with.

I would not want my trunking chanels tied up with additional radio traffic from another system that i was not getting the monthly fees from and loading my subscriber time down more thus reducing my subscriber membership because of the extra non profit traffic.

Im not even sure the FCC would allow this per regulations and rules.

Even if the FCC would allow it = I as the owner of my trunking system would not allow it .

Your trunking system owner/operator may be a little more lax on this but you may want to check with them.

Just my angle of thinking as i do own/operate several systems .

EKLB

Interesting.

Posted: Thu Mar 25, 2004 5:10 am
by chiefhal3
I hadn't really looked at it from that angle. I was pretty much assuming that since the radio on both ends was paying for a subsciption what ever they broadcast on the local system would be ok regardless of whether it was someone talking in the microphone there or something comming off a computer. I can see the issue. If I find more out and begin to decide this is doable I will consult the local operators and see if they have a problem with it. I know the guy in Georgia will be fine but I don't know the guy in Tennessee that well. I have only talked to him a couple times.

I know that there is very little traffic on the system as I have a trunk tracker scanner monitoring it and it seems there are only a couple of subscribers. Infact, I am kind of scared to spend too much money on this as I don't know how much longer he is going to be in business. I hear the M pulled his dealership, not sure why, and the system is a old Type I system pretty much out dated. So old that I couldn't even get my XTS3000 to work on it because the system won't support Type IIi.

As far as the FCC regs go, again, I was assuming. I was assuming that since people are doing it already on conventional repeaters it would be legal on trunking systems. Is this not the case anyone know?

Thanks for the input, anyone else?

Posted: Thu Mar 25, 2004 10:54 am
by larrybl
I have been toying with a concept, mind this has not been implemented in any way. For Public Safety Trunked systems, each system creates a special talkgroup, or several. Then using T1 or Microwave, link these talkgroups together, simple BIM interface. Then if you used this talkgroup, you could in effect simualcast on each seperate system. The system's wouldn't need to be of the same type.

We do have a plan in place to do this with the trunked system and a VHF repeater, for interoperability.

Posted: Thu Mar 25, 2004 1:47 pm
by Eric
If you don't mind, send me a PM with the name of the company. I might just know who owns it. If it is who I think it is I might be able to help.