US Telco Support > Verizon > Verizon Fiber Optics > Powering ONT without BBU?

Powering ONT without BBU?

I'm in the same boat. Poking around inside the BBU, I see the 12V coming in from the power supply, but the plug going down to the ont is more complex - it has 6 or 8 connections (most likely to relay BBU status to the ONT). Perhaps it's possible to trace which wires carry 12V down to the ONT by opening up the Verizon side of the ONT and tracing the wires back up to the harness in in the BBU...
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The more corrupt the State the more numerous the laws.

reply to jmr50

If your BBU is indeed fried, then you will need to bypass it.

That would mean feeding the ONT the 12V line directly.

I'm definitely not endorsing this action, but if you still want to try it, you could run a jumper wire from a 12V battery terminals to the corresponding wires that run from the BBU to the ONT.

I'm not sure if you need to do anything else to the other lines going to the ONT (eg. the ones that tell the ONT if the BBU is receiving power or not); you would need a pin-out guide to see all of this.

I don't see how you are going to bypass the fried BBU without literally physically bypassing it's electronics or whatever may be toast.

reply to rapamatic
Your photo shows one of the tamper-proof systems for BBU/ONT interconnection. You'll have a much harder time of modding for non-standard operation.

Does that cable simply unplug?

In my BBU, I found that disconnecting a signal line is not the same as it holding low. Disconnect is considered the same as alarm condition.

Signals are TTL signals. Low is like .5VDC, high is like 12VDC. Low is not the same as zero (disconnect).

I don't know how to bypass BBU entirely. I don't think it's as simple as providing 12VDC to the ONT.

The wide cable going down to the ONT does unplug, but it sounds like just dumping 12V down those two leads won't be enough... Hopefully on Monday I'll be able to request a tech come out to fix the BBU (because there was an outage in my area, phone tech support couldn't schedule a tech visit until the outage was fixed, and we were able to "confirm" the problem is with my ONT/BBU)... If it will be another week until a tech can come out, then I might be motivated to try to work around this!
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The more corrupt the State the more numerous the laws.

reply to jmr50

reply to jmr50
For what it's worth, a friend of mine said he was able to get a tech to his residence TODAY by dealing with the social media team at Verizon. The telephone support group told him next Wednesday was the earliest they could get someone there.

Good luck!

reply to birdfeedr
I restored power to the BBU. It runs for 2 seconds, then all lights go out. Beeping every few seconds from the BBU. Power reaches the ONT during those 2 seconds, but not the rest of the time.

reply to bhan261

reply to jmr50
I contacted them on Twitter. I'll see what they can do to help. My ONT is 2007-era, and I know there are more modern BBUs. It's possible the whole thing is toast, of course, too.

reply to jmr50
I contacted Verizon over twitter, they were able to schedule an appt for today. Much more helpful than phone support.
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The more corrupt the State the more numerous the laws.

not sure if my bbu is toast. after power came on (post-storm repairs) system ran for 4-5 hrs, then dies. assumed service ouutage. finally checked box and bbu error message was "replace battery", which i did w/ one form radio shack (still can't figure out why dead backup battery would casue system to not work) anyway, system ran for about 5 hrs then died. error lights were replace battery (red) and system status (green). do i keep putting batteries in or can someone suggest something more permanent?

reply to rapamatic
also, why is there an aux power jack on the bbu and can powering this up with the correct adapter solve this problem....also, does anyone know what the cioreect 12v adapter IS????

reply to jmr50
Have the same problem. My older BBU is bad and I know the power is good. The very small LED is green but none of the other lights work. Verizon is at my house now working on it (while I am at work.)

reply to jmr50
I'm in the same boat, I suspect a power surge during the storm might have taken out the AC transformer unit. I got mine working by connecting a 12 volt regulated power supply (the type used for powering a ham radio etc.) to the AUX power port using a plug I had in my junk drawer, but I'm only getting TV, no Internet or phone. I also tried a universal wall wart type adapter rated at 1000ma but it didn't produce enough power to keep it going.

reply to trinity bldr

reply to rapamatic
Thanks for the twitter tip. They sent a tech out today who replaced my battery backup unit and that solved the problem. He mentioned that many customers' BBU failed from the storm and I got the last one on his truck. He said there are more on backorder.