From: Alexei Monastyrnyi (alexeim@orcsoftware.com)
Date: Tue Oct 31 2006 - 18:57:54 ART
Hi.
Just from experience, 100m works fine for PoE with full
autoconfiguration. I have some Cisco AiroNet 1130AG more then 50m away
from cat6509, negotiating the same power as the ones within 50m range.
cat6k> (enable) sh port inlinepower 5 | in on |Port
Port InlinePowered PowerAllocated ActualConsumption Device
IEEE class
5/1 auto on 15400 14023 12200 cisco+ieee
class 3
5/32 auto on 15400 14023 12200 cisco+ieee
class 3
5/33 auto on 15400 14023 12200 cisco+ieee
class 3
5/34 auto on 15400 14023 12200 cisco+ieee
class 3
A.
Jung, Jin wrote:
> I am looking for some documents regarding to the Power over Ethernet and
> length of cable.
> One of VoIP engineer told me about 6 month ago that
> "if I use POE for the VoIP phones and if it's going over long distance
> 100f or more, I have to count for the minor loose of power on the CAT6
> wire'. So If I require static 7W, I need to configure the switch for 8W
> or 9W of power consumption.
> I am trying to verify this for my power calculation and length of cable.
> Does anyone have insight or documentation to support or not support this
> statement.
> Thanks..
>
>
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