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  #1 (permalink)  
Old 03-06-2014, 11:34 AM
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Default IP interface to LMR system

Howdy,

I am trying to find a product that will allow me to interface an LMR network with an IP network... ideally just a simple box that sits between a radio and an IP router or switch.

If I can explain my situation:

I have a simplex analogue radio system that is running perfectly well. The base station is mounted at the base of a tall mast, and gives sufficient coverage of the surrounding area on simplex.

Recently though, the office block has moved about 500m away from the mast and there is no way to lay a cable. However, there is a microwave link between the mast and the new office location because we have surveillance cameras on the mast that send back images via IP to the new office location.

I'm looking for an inexpensive way of being able to access the radio from a LAN connection of some sort in the office.

Surely this must be a relatively simple thing to achieve?

All information will be greatly appreciated.

'73 de ZS6HZ
Marc - Johannesburg
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Old 03-07-2014, 1:18 PM
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Are you looking to control the radio like to change channels and stuff or just to transmit and recieve?
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Old 03-07-2014, 2:00 PM
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Default IP interface to LMR system

Just transmit and receive.
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Old 03-07-2014, 2:07 PM
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Raytheon Company: NXU-2A Network Extension Unit

I'm fairly familiar with these. Install one at the radio and use a pc app that connects to it (called PCNXU) or add a second and bring out the tx and rx audio and ptt.

Inexpensive is relative. They are about $850 US each.

73,

John
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Old 03-07-2014, 2:12 PM
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Default IP interface to LMR system

Thanks for that info John. The local Raytheon representatives told me that they could supply me a solution, but at an equivalent of around $10,000 which sounded like absolute madness. Under $1000 sounds reasonable.
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Old 03-07-2014, 2:33 PM
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Radiotone makes something similar. It was an RF over IP link and I cant remember exactly what it was called but it ran somewhere in the under $200 range, although ive never used it myself so i cant really tell you too much about it.
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Old 03-07-2014, 2:35 PM
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Default IP interface to LMR system

Radiotone? I'll do a search. Thank you.
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Old 03-08-2014, 11:05 AM
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I've used these also. Simple and works.

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Old 03-08-2014, 11:09 PM
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IDA Corp makes a VOIP unit that is similar to a tone remote. At your base station you put the IP remote panel. At any location you put IP remote consoles, that look like tone or DC remotes, or even an app that runs in your computer. I have demoed one and it worked great even over the public Internet. On a LAN it should be pretty much seamless. The panel was around a grand if I recall correctly. I don't know how much the remotes are.
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Old 03-08-2014, 11:19 PM
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What about the Telex IP-223?
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Old 03-10-2014, 3:33 AM
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Default IP interface to LMR system

Emails sent to three companies. Now waiting for feedback. Thank you for the feedback and information, guys.
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Old 03-10-2014, 8:42 AM
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Check out the Omnitronics IPR series. I have experience with them and they just WORK.
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Old 03-10-2014, 9:00 AM
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Icom VE-PG2 or VE-PG3, or JPS NXU-2, either connected to your existing RF unit.

Another option would be changing the base station to an Icom FR5000 (FR6000) and configuring it as a simplex base with IP connectivity. ROIP is internal to the new FR's.You DO NOT have to use the FR's in IDAS mode.

The Icom solution allows control (ring-in and call out) of the radio from VOIP telephones.
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Old 03-10-2014, 9:46 AM
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I've used the Bosch/Telex C-Soft/IP-223/IP-224. They are highly configurable. They will interface with anything that gives you audio in, audio out, and PTT. Interfaced to certain transceivers, you can remote most, if not all of the keypad and display features of the transceiver. I don't generally recommend anything, but I will this.
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