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Author Topic: Interfacing Firebrick to MikroTik RB SXT LTE 4G device  (Read 7273 times)

meritez

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #15 on: July 21, 2022, 03:35:07 PM »

How are you powering it?
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #16 on: July 21, 2022, 03:40:53 PM »

Janet has a DC power supply. Is that the good thing?
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burakkucat

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #17 on: July 21, 2022, 05:46:44 PM »

Stepwise --
  • One end of a Cat5e Ethernet cable is plugged into the MikroTik SXT device.
  • The other end of the Ethernet cable is plugged into the MikroTik power injector.
  • The MikroTik PSU is plugged into the MikroTik power injector.
  • The MikroTik PSU is plugged into the mains electricity supply.
As for the signal strength LEDs on the SXT, do the two attached images (cropped screen-scrapes from the YouTube installation video) help?

Next day edit: The attached images have now been deleted, as they have served their purpose.
« Last Edit: July 22, 2022, 04:04:16 PM by burakkucat »
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g3uiss

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #18 on: July 21, 2022, 08:28:58 PM »

Not sure how you supply a Poe device (48 v) with a DC PSU ?
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Alex Atkin UK

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #19 on: July 21, 2022, 09:07:52 PM »

Not sure how you supply a Poe device (48 v) with a DC PSU ?

Usually there will be a injector with ethernet and DC in and just ethernet out. Often these devices support passive PoE to allow this, it just injects it on specific wire pairs.
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meritez

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #20 on: July 21, 2022, 09:29:32 PM »

Not sure how you supply a Poe device (48 v) with a DC PSU ?

https://mikrotik.com/product/RBPOE

@Weaver what power supply are you using for the RBPOE?
« Last Edit: July 21, 2022, 09:34:48 PM by meritez »
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #21 on: July 21, 2022, 10:02:16 PM »

Janet reminds me that she has already plugged the PoE injector in. Iíll send a photo. Weíve used PoE injectors before.
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meritez

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #22 on: July 22, 2022, 04:35:18 AM »

I'm aware that you may have used Passive POE injectors before, what is the voltage on the DC power supply as the flashing ethernet green LEDs and flashing signal strength are indicative of a lack of voltage, Mikrotik recommend at least 18v to power the RBPOE.
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #23 on: July 22, 2022, 07:02:15 AM »

Sorry for the confusion. :-) Iím pretty sure that Janet didnít use a random PSU, because she managed to help me get to the office across the landing from my bedroom and I supervised while she put things together. Did you include a PSU in the box with the SXT? I donít recall going digging for PSUs. I can take photos of course. And we can measure the voltage.
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meritez

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #24 on: July 22, 2022, 11:28:06 PM »

Sorry for the confusion. :-) Iím pretty sure that Janet didnít use a random PSU, because she managed to help me get to the office across the landing from my bedroom and I supervised while she put things together. Did you include a PSU in the box with the SXT? I donít recall going digging for PSUs. I can take photos of course. And we can measure the voltage.

Yes there was one in the box, I'm concerned it's not outputting the correct voltage, can we have photos.
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #25 on: July 23, 2022, 04:15:58 PM »

I donít think I can photograph the PSU because of the black shiny reflective black-on-black lettering. It says: Output: 24V @ 800mA ; Input 100-240 V 50/60 Hz; Model: C[?]ullPower SAW30-240-0800G. It has the wrong type of mains plug on it, not a UK mains three-pin plug, but a twin-round plug.
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burakkucat

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meritez

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #27 on: July 23, 2022, 07:51:12 PM »

The SXT was purchased from the Republic of Ireland, I've never used that power supply as I have a mikrotik rb750up:
https://mikrotik.com/product/RB750UP

I can hunt down a UK power supply, there £9 new on eBay with a rbgpoe adapter:
https://www.ebay.co.uk/itm/144201275943
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burakkucat

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #28 on: July 23, 2022, 08:56:05 PM »

I can hunt down a UK power supply, there £9 new on eBay with a rbgpoe adapter:
https://www.ebay.co.uk/itm/144201275943

A good price for the identical model PSU to that which I found (and with a PoE injector included).
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Weaver

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Re: Interfacing Firebrick to MikroTik RB SXT LTE 4G device
« Reply #29 on: July 24, 2022, 12:21:28 AM »

We just put a foreign-to-uk plug adaptor in, which we had in stock anyway. Do you think this PSU is the bad thing then guys?
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