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Community Member

Phones not powering up after reload of power switch

We have some WS-C3524-PWR-XL-EN switches here that we reload every week. After the reload some of the phones don't receive any power. It is random on which phones won't get power. All I have to do is walk to the desk and unplug/replug their phones back in and the phones will come up. Any idea why this is happening?

3 REPLIES
Blue

Re: Phones not powering up after reload of power switch

why do you reload switches every week? this seems unusual and if it is to remedy a problem, perhaps looking into fixing that problem would be more beneficial in the long run.

one of the biggest reasons a phone does not power up, aside from the switch/port having a physical issue, is that the Power Allocation Algorithm has not successfully completed its task. this could be for a few reasons from FLP not looping back to the phone successfully to no power available in the switch to allocate.

see this link for more info on the Power Allocation process:

http://www.cisco.com/en/US/partner/products/hw/phones/ps379/products_tech_note09186a00801189b5.shtml

Community Member

Re: Phones not powering up after reload of power switch

Is there a way to figure out how much power the switch has to allocate?

Community Member

Re: Phones not powering up after reload of power switch

I have ran into similar issue and the fix was to upgrade the IOS on the switch. I would try the latest version of IOS.

Danny

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