[Asterisk-Users] Power over Ethernet (PoE) switch recommendations

[William M Conlon]

it's the cable that is 802.3af, not the phone.
On Apr 21, 2006, at 5:01 PM, Steven Ringwald wrote:

> William M Conlon wrote:
>> Beware.  Although the Polycom 501s will sink power over ethernet  
>> (that is they are powered by a cable pair within a cable that  
>> resembles ethernet), they are NOT IEEE 802.3af POE devices!!!!!   
>> They work on 12 volts (I think -- haven't measured it) instead of  
>> 48VDC.  So don't expect to buy a POE source and expect the phone  
>> to receive power just by plugging in a patch cable.  They must be  
>> powered by the Polycom voltage sources.
>>
>> Nevertheless, here's what works for me:
>>
>> Netgear FS108 :: Polycom injector cable :: RJ45 coupler :: patch  
>> cable :: Polycom 501
>>
>> Some notes:
>> 1.  The Polycom injector cable should be plugged into a POE port  
>> on the switch (the Netgear FS108 switch has both powered and  
>> unpowered ports), or the Polycom injector will not source power.
>> 2.  The Netgear FS108 is NOT sourcing power.
>> 3.  The patch cable is a 50-foot CAT5.
>> 3.  To beat a dead horse, the Polycom 501 itself, is NOT a POE  
>> phone, IMHO.  Caveat emptor.
>
> They are 802.3af, if you buy the correct cable (they two different  
> types):
>
> (From http://www.voip-info.org/wiki-Polycom+Phones)
>
> (phones with the cables)
> SoundPoint IP 501 (NA PSU)|2200-11531-001|$270
> SoundPoint IP 501 (IEEE PoE)|2200-11531-025|$295
>
> (just the cables)
> NA PSU for 30x,50x,600 Qty 5|2200-07496-001|$35
> IEEE PoE cable for 30x,50x|2200-11077-002|$35
> Cisco PoE cable for 30x,50x|2200-11014-002|$35
>
> I believe the reason the 30x and 50x's are like this is because the  
> standard was still in flux when they were designed. They put the  
> POE "brains" into the cable to make it easy to switch to whatever  
> standard was decided upon. The 601 comes with built in POE  
> (compatible with Cisco and IEEE).
>
> Steve
>
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Bill

William M. Conlon, P.E., Ph.D.
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