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Author Topic: Interfacing Firebrick to MikroTik RB SXT LTE 4G device  (Read 7274 times)

burakkucat

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #30 on: July 24, 2022, 04:50:33 PM »

Do you think this PSU is the bad thing then guys?

I would certainly suspect it, given your report of the SXT's LEDs behaviour.

Before shipping it to you, meritez had used the SXT device and it was known to be good. The MikroTik PSU and MikroTik power injector were not used, so their status is unknown. The Ethernet cable is one of your own, from your extensive stock-holding.

Of the four physical entities named in the above paragraph I would be suspicious of the following (in decreasing order of probability):
  • The PSU.
  • The injector.
  • The Ethernet cable.
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digbey

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #31 on: July 24, 2022, 05:37:10 PM »

Weaver's PSU, as he described it, is the SAW30-240-0800G 24V 800mA. The PSU supplied with the SXT according to the MicroTik website is an SAW-240-1200B 24v 1.2A (like the one in the eBay links).
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burakkucat

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #32 on: July 24, 2022, 06:34:12 PM »

Weaver's PSU, as he described it, is the SAW30-240-0800G 24V 800mA. The PSU supplied with the SXT according to the MicroTik website is an SAW-240-1200B 24v 1.2A (like the one in the eBay links).

Thank you for spotting that.  :)
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #33 on: July 24, 2022, 09:53:04 PM »

Thanks to Meritez, Burakkucat and Digbey for sorting that out! ebay ordered.
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #34 on: July 27, 2022, 07:27:12 AM »

eBay still hasn’t turned up yet. I’ve just remembered- I could use my Cisco POE injector for now but I’d have to check that the output voltage is correct.
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burakkucat

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #35 on: July 27, 2022, 05:55:29 PM »

eBay still hasn’t turned up yet.

I guess that is the "Highlands and Islands" effect in operation.  :(
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #36 on: July 29, 2022, 08:56:09 AM »

We get fantastic royal mail deliveries, other carriers can be iffy. The ebay guy told us it would be late. I’m not well at the moment, and J is worked off her feet, so might get a chance to resume operations at the weekend if she’s available.
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #37 on: August 07, 2022, 07:18:14 PM »

After a further couple of weeks of eBay delays then crippling overwork for Janet and horrible fatigue and pain on my part we’ve finally got back to testing the SXT.

Plugged in the new POE injector and PSU from eBay, exactly the same failure result. Same [doubleflash—wait] on the relevant port on my main switch. No signal-strength bars showing on SXT. As before, LEDs are on inside the SXT housing by the POE-in RJ45, so there are Volts coming in.

Also tried the old POE injector with new eBay PSU, same story. I ought to check that our eBay man has not sent the wrong part. Will try and squint to see the model number on the PSU in the morning. In my earlier post, I wrote that I thought a photo wouldn’t be successful because before it was fairly dark grey, small text on reflective black plastic. The new PSU is a UK, three-pin plug model, so that’s as expected.

What are we missing?

I have a couple of Cisco active POE injectors, btw, untested, so not ‘known good’, but don’t want to blow anything up - forgive my ignorance about the variety of power standards.
« Last Edit: August 07, 2022, 07:22:07 PM by Weaver »
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burakkucat

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #38 on: August 07, 2022, 10:35:38 PM »

Hmm . . . I'm not sure what to suggest for the next step. Perhaps it would be best to wait for meritez' input.
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g3uiss

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #39 on: August 07, 2022, 11:06:39 PM »

I’m sure those POE devices are 24v which I believe is what you need.
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #40 on: August 08, 2022, 01:43:43 AM »

@Burakkucat - Indeed, agreed.
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burakkucat

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #41 on: August 08, 2022, 04:40:22 PM »

Just two quick questions. Exactly what type of Ethernet cable are you using between the SXT and the PoE injector? Is the plug fully home in the socket on the SXT?
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #42 on: August 08, 2022, 05:28:44 PM »

Janet checked the fit of the RJ45 plug inside the SXT last night. It’s getting some power because there’s that LED lit inside the SXT. The ethernet cable is a CAT6 good quality one. I can soon swap it out for another, should have plenty in the oak box that for some reason Janet calls "Bert’s Barrow" where all the spare kit lives, spare modems, cables and so on. Have ordered a load more ethernet cables of various short-medium lengths to top up stocks and they should be here tomorrow.
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burakkucat

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #43 on: August 08, 2022, 06:06:49 PM »

Could you just use an ordinary Cat5e patch cable for a temporary test?
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meritez

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #44 on: August 08, 2022, 08:54:38 PM »

After a further couple of weeks of eBay delays then crippling overwork for Janet and horrible fatigue and pain on my part we’ve finally got back to testing the SXT.

Plugged in the new POE injector and PSU from eBay, exactly the same failure result. Same [doubleflash—wait] on the relevant port on my main switch. No signal-strength bars showing on SXT. As before, LEDs are on inside the SXT housing by the POE-in RJ45, so there are Volts coming in.

Also tried the old POE injector with new eBay PSU, same story. I ought to check that our eBay man has not sent the wrong part. Will try and squint to see the model number on the PSU in the morning. In my earlier post, I wrote that I thought a photo wouldn’t be successful because before it was fairly dark grey, small text on reflective black plastic. The new PSU is a UK, three-pin plug model, so that’s as expected.

What are we missing?

I have a couple of Cisco active POE injectors, btw, untested, so not ‘known good’, but don’t want to blow anything up - forgive my ignorance about the variety of power standards.

can you see the mac address via arp?
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