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Queston about linking two radio systems
- Thread starter fao110
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jim202
Member
Having worked for a radio interoperability company in the past, the simple answer is yes. I have done all sorts of linking non compatible radio system with a gateway. Like taking a Motorola P25 trunking system with a Harris EDACS trunking system. Take a low band simplex operation and connect it to a 700 MHz. P25 system. As long as you can make a connection at the analog level, it can be done.
Generally the gateways were installed at dispatch centers or in mobile command vehicles. Spent 10 years working on the interfaces and working with the software boys to even have the gateways to be able to remotely control some radios to change channels and zones from a remote location.
In the mobile command vehicles, the interface was from radio to gateway and then to another radio.
If you are looking for factual information, do an Internet search on the "Virginia COMLINC Project". The state has some 160 plus gateways linked together with simple IP connections. You can take a laptop and as long as it can make the IP connection into one of the gateways, you can control the radios of your choice with the permission of the distant dispatch center that controls the permissions of the local gateway.
Hope this answers your question.
Or just simply patch it at the console... lots of people do it every day
Yeah that's silly. With the right equipment, anything's possible - even P25 to DMR. In the backhaul, we're basically just talking about voice over IP, and it's easily possible. For instance, take every single jurisdiction (which is frankly most of them) that use a P25 system AND use analog Lo/VHF/UHF paging for fire departments.
Often takes some upgrading and/or reconfiguring and/or replacing of equipment on the analog system side to make it all work, but still. Silly to say 'it can't be done, no way no how'. It's done in nearly every county/state/city that uses P25 and has fire pagers.
Often takes some upgrading and/or reconfiguring and/or replacing of equipment on the analog system side to make it all work, but still. Silly to say 'it can't be done, no way no how'. It's done in nearly every county/state/city that uses P25 and has fire pagers.
SteveC0625
Order of the Golden Dino since 1972
"We were told" seems to pop up a lot lately. Who told you? A competing vendor or consultant? Or maybe someone else? I hate to say it, but "we were told" is usually total BS.
My home county is doing exactly what you asked about, and actually on a multi-county basis. It's being done all over the US.
Project25_MASTR
Millennial Graying OBT Guy
Sounds like a MSS told them as they were thinking with a closed mind (Motorola does not allow IP linking from analog to digital on IP native digital repeaters) and not in a case of there is tons of interop options currently out there.
C-Bridge currently makes a product for inter-linking the different Motorola digital formats and analog. Raytheon makes a few products capable of creating bridges. Raven makes a few products capable of bridging systems (there is a Parish in LA that a friend engineered a solution for connecting the statewide P25 trunk system to the county's analog VHF system)...there are multiple ways to skin that cat. However the only OEM's offering that kind of support in their infrastructure have little to no presence in the US (Simoco is one of them).
ecps92
Member
talviar
Member
Having been on the design side of a P25 Radio system (800 P25 Phase I digital)-
Technically *Yes*
Feasibly in operation *Maybe*
If this is a repeated system and the traffic level isn't too bad, it shouldn't cause too many issues.
Simplex VHF with a proper high level RF site- your users may shoot who ever turned it on if they now hear everything that the comm centers base station hears. With that said, some of my VHF base stations during band openings and such may be open receive for 2 hours or more.
So if its a heavy traffic channel, you are quite possibly pulling 1 Voice path out of the loop for an extended period of time. The decision makers may have decided, **its not worth it** (translates to) *its not feasible to happen*
If this is on a Motorola trunking system, basically the base radio gets connected to an IP Gateway and the backend has a permanent patch between a talkgroup and this base radio.
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