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Hi,

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I recently bought a UHF XPR 8300 repeater and a UHF XPR 5550 at a hamfest. I'm planning on using these on a commercial pair. I was hoping to use enhanced encryption for this, which I think licenses can be bought for around $50 based on a quick search. The person I bought it from didn't seem super familiar with encryption, but was saying that the repeater is not able to load an encryption key, only the mobiles/portables can. That seemed strange to me since there was also someone else there that seemed very familiar with this repeater, saying that yes you can use an analog tone remote through the back connector, but I was thinking how could the repeater encrypt the traffic which is originating directly from it if it can't load an encryption key? And now it seems like it can't do that at all. Maybe through a digital remote where you load the key into the remote itself?

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I also bought an XPR 5580 for 33cm ham use, analog to start with there but hoping some DMR 33cm repeaters come on the air near me at some point.

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I probably should not have impulse bought these, especially the repeater, since now that I'm looking into it more and I'm not sure if it fits my use case. I suppose as long as it works the price wasn't bad and I can sell it or possibly use it as a portable repeater for occasional temporary setups.

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First off, is it not possible to use analog 4 wire tone remotes into the rear connector of the XPR 8300? I was hoping to be able to have the repeater set up for DMR but still use analog tone remotes connected to it, but I don't think that is possible now.

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I was also hoping to use the ethernet interface to link it to voip infrastructure, similar to allstarlink (but for my private use), mainly phone patch and any other reason I want a computer based interface to it where the computer can TX/RX audio to/from it, for instance custom command & control purposes, and potentially a bridge to allow me to use my existing analog tone remotes in the event the repeater can't handle that itself. I think this might be possible with something like MMDVM where hopefully the repeater can handle the encryption (if it even can)??

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Originally I was just assuming that it was possible to do analog voice into it and have a TX/RX/COR/PTT line to something like an RA-42, and then have that audio digitized in the repeater. I assume if that were possible then somewhere in the repeater configuration you would tie the analog 4-wire line into a specific DMR talkgroup, but it seems it was very dumb of me to make all these assumptions.

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If the repeater was able to handle analog voice into it, hopefully it would have multiple paths like the Quantar, one could be for the RA-42 and the other could go direct to the tone remotes, with the remote F keys able to select different talk groups.

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If this was a dumb purchase for this use case then, is there a repeater which could handle some or all of these use cases?

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Thanks for reading!

Mike

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Wouldn't the repeater just pass the encrypted audio from mobiles and handhelds? I'm trying to logically think whether the repeater needs to unencrypt it to repeat it or not. In the analog world, my commercial repeaters pass voice inversion audio no problem. Of course, in both instances, if you wanted to monitor that audio at the repeater itself, you couldn't because it's just passing the encrypted audio, not decoding it locally. If you needed to decode it at the repeater and it passed the audio, you could just use a handheld at the repeater site to decode the audio. Maybe you'd have to allow open audio to pass the encrypted audio through the repeater. Of course, if you are in a high-use area, unlike the boonies for me, that might present issues.?

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Chuck | N2DUP | KAB3210

The repeater certainly would pass encrypted traffic without needing to decrypt it, but I'm wondering how traffic originating from the repeater would be encrypted, say a phone patch or some sort of (digital/analog) tone remote connected directly to the repeater or something.