RE: PoE Calculations

http://tools.cisco.com/cpc/

Input 120 vs 240 does make a difference, twice actually :) It occupies two poles (or 3) and will increase your total output wattage.

Just saying you need 7945's is not enough, you need to know the quantity and whether you're okay with combined mode power or true redundant power.

-ryan

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Shaughn
Sent: Sunday, November 04, 2012 1:06 PM
To: Cisco Fanatic
Cc: ccielab_at_groupstudy.com
Subject: Re: PoE Calculations

110 vs 220 has got nothing to do with the wattage (which is what you are after )

The US is 110V while the rest of the world runs 220V (over simplifying)

You need to get a higher wattage PSU.

CCIE # 23962 (SP)

Sent from my iPhone

On 04 Nov 2012, at 7:35 PM, Cisco Fanatic <ebay_products_at_hotmail.com> wrote:

> We have a Cisco 4506 with Supervisor 6-E. We plan on replacing the
> existing 4 line cards with
> WS-X4548-GB-RJ45V48 port 10/100/1000 BaseT with IEEE 802.3af PoE to
> support Cisco 7945G IP phones. We currently have 1000W power supply.
> DC1050-4506-SW1#sh powerPower Fan
> InlineSupply Model No Type Status Sensor Status------
> ---------------- --------- ----------- ------- -------PS1
> PWR-C45-1000AC AC 1000W good good n.a.PS2 PWR-C45-1000AC
> AC 1000W good good n.a.
> Power supplies needed by system : 1Power supplies currently available : 2
> Power Summary Maximum (in Watts) Used
> Available---------------------- ---- ---------System Power (12V)
> 430 1050Inline Power (-50V) 0 0Backplane Power (3.3V)
> 0 40---------------------- ---- ---------Total
> 430 1090
> What is the recommended power supply for this configuration?Should we
> go with 110V or 220V is a discussion point?
>
>
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Received on Sun Nov 04 2012 - 18:11:53 ART