Why does VDSL stop when power goes off?

Forums › Spark New Zealand (including Skinny and BigPipe) › Why does VDSL stop when power goes off?

Technofreak

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#225896 10-Dec-2017 19:05

We've had the power out a few times today. We have a UPS to power the NAS and the Router /Modem and one or two other devices.

It seems every time the power goes off the VDSL connection goes down. The router / modem is running fine but there is no DSL light. I've tried rebooting the router, the DSL light flashes once but connection is not established.

Is there any reason why VDSL should drop off when the power is off?

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#1916194 10-Dec-2017 19:09

Because the cabinet the VDSL comes from is mains powered.

michaelmurfy

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#1916195 10-Dec-2017 19:11

DarthKermit:

Because the cabinet the VDSL comes from is mains powered.

Most cabinets have battery backup also - depends on the area.

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Technofreak

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#1916241 10-Dec-2017 19:37

I've can never recall the VDSL dropping off previously, however we don't have many power outages and I cannot remember what happened last time.

I'd expect there'd be batteries in the cabinet because of our location.

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Tinkerisk

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#1916244 10-Dec-2017 19:44

Technofreak: Is there any reason why VDSL should drop off when the power is off?

I would check if the UPS's output power waveform is good enough for the router's/modem's stable supply. When the waveform isn't good enough (close to sinus) exchanging of the power adapter of the modem/router to a better one would help.

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Technofreak

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#1916249 10-Dec-2017 20:03

Tinkerisk:
Technofreak: Is there any reason why VDSL should drop off when the power is off?

I would check if the UPS's output power waveform is good enough for the router's/modem's stable supply. When the waveform isn't good enough (close to sinus) exchanging of the power adapter of the modem/router to a better one would help.

I very much doubt that's the problem. The router is working, it's only the DSL connection unless you're inferring the DSL connection is being affected by the waveform.

I'm pretty sure it's worked OK during previous power outages.

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#1916265 10-Dec-2017 21:06

xDSL from the cabinet or exchange should continue to operate in a power cut. There are batteries in the cabinets since they also provide voice services for lots of people.

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#1916271 10-Dec-2017 21:11

michaelmurfy:
DarthKermit: Because the cabinet the VDSL comes from is mains powered.
Most cabinets have battery backup also - depends on the area.

TechnoFreak: I'm pretty sure it's worked OK during previous power outages.

Maybe ..., the battery in the cabinet died?

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#1916285 10-Dec-2017 21:28

We had the same thing, has worked fine in every previous power outage but the last one it stopped working.

Reported it to chorus but have not had another power outage to see if anything has been done about it.

hio77

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#1916286 10-Dec-2017 21:28

What's the area? there have been a few cabinets lately that had been disabled due to localized power outages...

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#1916300 10-Dec-2017 22:22

Off topic but power related. Does a naked VDSL connection have any dc applied? I've been told my new connection has gone ahead but assume that standing a modem up is the only way to confirm that. Modem on its way.

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#1916302 10-Dec-2017 22:24

When I last had a legacy telephone in the house and plugged it into my vdsl line to see what was there, it had a fast busy tone and power. Really should see if there is a way to harness that power to do something useful rather than just be idle.

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hio77

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#1916306 10-Dec-2017 22:39

Bung: Off topic but power related. Does a naked VDSL connection have any dc applied? I've been told my new connection has gone ahead but assume that standing a modem up is the only way to confirm that. Modem on its way.

for naked connections, Some providers actually provision a full clothed service, and bar the PSTN side of the line.

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Technofreak

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#1916308 10-Dec-2017 22:48

hio77:

What's the area? there have been a few cabinets lately that had been disabled due to localized power outages...

Chartwell, Hamilton. If you need more detail I can PM you.

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Technofreak

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#1916309 10-Dec-2017 22:51

IcI:

michaelmurfy:
DarthKermit: Because the cabinet the VDSL comes from is mains powered.
Most cabinets have battery backup also - depends on the area.

TechnoFreak: I'm pretty sure it's worked OK during previous power outages.

Maybe ..., the battery in the cabinet died?

That was my thinking too but was trying to find out if there may have been something else.

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#1916310 10-Dec-2017 22:56

My line used to be an intact with tone but changed several years ago. I only asked for a naked reconnection a few days ago so was surprised to get told it should be going now. It's Spark/Chorus and there's no apparent pots that can be metered. Fingers crossed that's normal.

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