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 [EMAIL PROTECTED])
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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