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  #1 (permalink)  
Old 12-27-2013, 9:10 PM
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Default Mototrbo Digital Phone a Patch

I am a relative novice when it comes to LMR, but have just stood up a Mototrbo Digital UHF Radio system for my organization. We are running 3 XPR 8400 repeaters connected via IPSC and 20 radios (combination of XPR 7550, SL 7550, and XPR 3500). I would like to implement a digital phone patch for the sole purpose of connecting our radio users with our non-radio users over our PBX. We are located in a major metropolitan area and as such are prevented form connected to the PTSN.

I've looked into some of the software solutions including Teldio, SmartPTT, TRBONet, etc., but have found them prohibitively expensive and/or complicated. I am now exploring the use of a COTS Analog Phone Patch such as one of those produced by Zetron.

I would anticipate dedicating our 2nd time slot to the phone patch. We would like for non-radio users to be able to reach a specific radio user by dialing an extension on our PBX.

Any suggestions, help, or caution would be very much appreciated.

Thanks!!
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Old 12-29-2013, 8:50 AM
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Look at the EID - HKVN4049A - Digital Telephone Interconnect - XPR Repeater

Depending on your technical expertise this combined with an Asterisk box makes a great solution, but you may just want a Zetron interface for simplicity..

I have to ask, based on the questions you are posting, don't you have a dealer you work with ?
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Old 12-29-2013, 10:02 AM
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Thank Firebuff. We actually have an existing Avaya PBX we would like to connect to, so I don't think we'd benefit from Asterisk. Do you have any experience with the the Zetron box solution?

We do have a dealer we've worked with to purchase the system, one of the biggest national Motorola dealers. Unfortunately they haven't been super helpful with the configuration. When we were first configuring the system, they didn't review any of the options with us, emergency handling, etc. and gave been pushing us towards very expensive software based phone patch solutions like Teldio. Consequently I am trying to develop as much expertise with the system as possible.
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Old 12-30-2013, 7:45 AM
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My experience is second hand with the Zetron, understood the were some use issues in that the full duplex phone and half duplex radio connections require a DTMF to simulate the mic release currently.

Even with the Avaya you MAY find that putting in the necessary over dials to talk with radios verses groups will be easier on the Asterisk box as well as being able to do SIP to SIP where as the Zetron I believe is Analog only.

Sorry, you are not happy with your dealer, I would try and find someone more local. The big national dealers are mostly about boxes not necessarily personal service. Also, if you check your MOL account for the service number, Motorola 800 support is pretty good at helping with configuration options / issues.

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Old 12-30-2013, 8:47 PM
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The Zetron is fully supported by MOL, and consists of a digital radio side to analog phone patch connection. That's what you will get, no matter whom you choose. There will be no digital radio to SIP phone connection.
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Old 12-31-2013, 2:34 PM
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Quote:
Originally Posted by com501 View Post
The Zetron is fully supported by MOL, and consists of a digital radio side to analog phone patch connection. That's what you will get, no matter whom you choose. There will be no digital radio to SIP phone connection.
Actually the EID is a four wire analog output. By using an Asterisk IPBX with the ham radio / four wire divers , instead of the Zetron you can connect to all sorts of things, SIP is just one of them.

http://www.xelatec.com/xipar/node/68

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Last edited by Firebuff880; 12-31-2013 at 2:51 PM..
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