topic Re: Battery Back-up for Openreach ONT in Tech Help - Software/Hardware etc

Battery Back-up for Openreach ONT

Eggs — Sat, 22 Jul 2023 19:56:44 GMT

I am more than happy with my present system but have got to wondering about the ONT.

I am toying with the idea of getting a UPS (uninterruptable power source) for my system, router and VoIP telephone adapter.

But all those are in my living room and networked to the ONT in the hall.

I know Openreach used to supply a battery back-up for the ONT but mine hasn't got one.

I am looking for advice for the best option here.

Re: Battery Back-up for Openreach ONT

RobPN — Sat, 22 Jul 2023 20:45:58 GMT

@Eggs

Sending power from the UPS to the ONT might be possible via a passive PoE adapter set through the Ethernet connection between the router and ONT providing you can get the correct size connector for the ONT.

e.g. this type of kit (although IDK if that is the correct sized plug);

Passive Low Voltage RJ45 POE Injector Set

EDIT: I'm referring to the type of low voltage DC-battery power source used for backup, not the more common type which provides mains-level voltage.

Re: Battery Back-up for Openreach ONT

RichardB — Sun, 23 Jul 2023 08:39:10 GMT

The data rate is not stated on the PoE adaptors link.
I have yet to find a passive PoE adaptor which exceeds 100 Mbps.

Re: Battery Back-up for Openreach ONT

Dan_the_Van — Sun, 23 Jul 2023 09:37:03 GMT

@Eggs

maybe consider one of these https://www.broadbandbuyer.com/features/4632-keep-your-router-powered-with-eaton-3s-mini-ups/ rather than using POE

Re: Battery Back-up for Openreach ONT

RobPN — Sun, 23 Jul 2023 10:21:13 GMT

@RichardB wrote:
The data rate is not stated on the PoE adaptors link.
I have yet to find a passive PoE adaptor which exceeds 100 Mbps.

You make a very good point @RichardB and something I hadn't considered.

A search found PoE splitters which claim to be Gigabit capable, so perhaps one of those at the ONT end of the connection would be suitable, which would obviously need a ~~DC-powered~~ Gigabit PoE source at the router end, be that a switch or injector.

e.g.

Gigabit PoE Splitter 12V 2A Output with IEEE 802.3af/at Standard Compliant 10,100,1000Mbps Power over Ethernet Splitter Adapter

Re: Battery Back-up for Openreach ONT

Eggs — Sun, 23 Jul 2023 10:23:33 GMT

I have found this. But it seems a bit pricey and am not sure if it will work.

https://1va.co.uk/ipower-12vdc-ups-p-78.html

Re: Battery Back-up for Openreach ONT

bmc — Sun, 23 Jul 2023 11:20:47 GMT

@Eggs

You could have a look at the following

https://b4rn.org.uk/support/helpful-documents-and-guides

There are 2 documents on UPS. Not certain how up to date they are.

B4RN is a small community owned ISP and the Help page relates to their supplied equipment but the general principles will be the same. Note that their ONT is passive and the work is done by the router which is connected by fibre cable to the wall ONT.

Brian

Re: Battery Back-up for Openreach ONT

RichardB — Sun, 23 Jul 2023 11:39:36 GMT

The cheap passive PoE adaptors seem to use two of the four Ethernet pairs for the power.

Only the remaining two pairs are used for the data.

Hence the 100 Mbps limit.

Active PoE uses all for pairs for data and supplies 48V to power the active PoE to 12V splitter at the remote end.

The cheapest solution might be to run to Ethernet leads to the ONT, one for Data and the other for PoE?

Re: Battery Back-up for Openreach ONT

Eggs — Sun, 23 Jul 2023 11:49:56 GMT

This is an option since I do have a spare line running from my living room into the hall.

Re: Battery Back-up for Openreach ONT

stagetechuk — Thu, 12 Oct 2023 14:32:27 GMT

Apologies for resurrecting a relatively 'oldish thread, but wanted to shout out to @Eggs that'd the 1VA units are great. I appreciate they are relatively expensive but they are the perfect solution to your problem.

I run three at home, one on my ONT, one on my router and one on my primary mesh wifi AP. This worked well for me because each of the three devices were in separate locations, so buying a more cost effective traditional UPS didn't work for me.

Battery life is excellent, keeping us online during a power cut in of excess of 5 hours!

James

Re: Battery Back-up for Openreach ONT

Mav — Thu, 12 Oct 2023 19:20:50 GMT

Moderator's note by Mike (Mav): Thread moved from Full Fibre to Tech Help.

Re: Battery Back-up for Openreach ONT

Ian06 — Sat, 14 Oct 2023 08:47:09 GMT

I saw these Konnected UPS Battery on Amazon, looked like they might be suitable as a small ONT or Router ups...