[Asterisk-Users] Polycom 501 power over ethernet

[C F]

I guess the way you want to do it should work, (over a long run you
might run into trouble, but only trial and error will confirm this).
However keep in mind that the polycom cables come keyed on one end of
the RJ45, so that you don't by mistake put the powered end into the
switch.  What that means is that you will have to cut that bulging tip
off, othewise you shouldn't have a problem.

On 3/5/06, William M Conlon <bill at tothept.com> wrote:
> When I bought two Polycom 501 SIP phones, I naively thought they were
> Power-over-Ethernet (IEEE 802.3af) because they were "powered over
> ethernet."  Silly me.
>
> Polycom must have some odd voltage or funny way of injecting the
> power, because the POE switch I bought for them (Netgear F at 510P)
> won't power them, though if I use the Polycom-supplied AC adapter and
> ethernet power injector cable, they work with the switch in either
> its powered or unpowered ports.
>
> Anyhow, I hadn't seen any mention of how people power these phones,
> as I had planned on centralizing phone power on a UPS to supply my
> Asterisk server and POE switch.  Now the question is:
>
> Can the Polycom AC-powered injector be used with a standard ethernet
> patch cable:
>
>         switch :: Polycom injector cable :: RJ45 coupler :: patch cable ::
> Polycom 501
>
> which would allow me to power the Polycom AC adapters by my UPS.  Or
> do I need to provide a UPS at each phone and run the ethernet like
>
>         switch :: patch cable :: RJ45 coupler :: Polycom injector cable ::
> Polycom 501
>
> thanks.
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