[asterisk-users] POE Splitters

[Michael Graves]

Sometimes it doesn't matter what the device actually draws as much as
what it declares itself to be to the upstream switch. For example, most
polycom phones draw under 9 watts but in practice they declare
themselves to the switch as requiring the full 15.4 watts allowed by
802.11af class 1.

I've seen but never used the 3Com Netjacks, which seem like a possibly
nice solution to this kind of problem. They not only accept inbound
POE, but can have their own power supply and provide POE to several
downstream devices.

Michael


--Original Message Text---
From: bruce bruce
Date: Thu, 22 Jul 2010 19:09:07 -0400

The Aastra 53i draws only 2 Watts from a Linksys 24 port POE switch. 25
phones is around 55 Watts.

-Bruce

On Thu, Jul 22, 2010 at 5:16 PM, Andrew Latham <lathama at gmail.com>
wrote:
The Snom 360 phone in front of me draws 4w...


~
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On Thu, Jul 22, 2010 at 2:58 PM, David Gibbons
<dave at videon-central.com> wrote:
> There is no such device -- it's outside of the POE spec.
>
> Class 3 devices are allowed to consume at max 15.4W. Most phones are class 3
> devices. The math just doesn't work out. Even if you used the draft standard
> for class 4 (~30W), you could still power max 2 devices at 15W/ea.
>
> -Dave
>
> On Thu, Jul 22, 2010 at 2:46 PM, Matt <mhoppes at gmail.com> wrote:
>>
>> I've got an interesting situation where I have one cable run from the feed
>> area to the service area.   I have three devices that I need to power at the
>> service area.  Is anyone aware of a device that will take the POE from the
>> cable run and then allow me to split it to two or three devices at the
>> service end?
>>
>> When I search for splitter all I get are the injectors, but I figure
>> someone has to make something.... I realize I'll need a power adapter with
>> enough amps to power the full load at the end.
>>
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