I was reading somewhere that Polycom cables only work when the power is over pins 1236 (signal pairs). I won't swear to it, but that's what I read.
Anyway, most PoE injectors (not all, but most) inject power on pins 4578 (non-signal pairs), meaning it won't work with things that need the power on the signal pairs. For that, you'll need a switch that supports PoE. For simple testing, Netgear has some cheap unmanaged switches that provide PoE that's 802.11af-compliant. We're using a couple of them in really small satellite offices, and they've been holding up pretty well. But I wouldn't use them in a large-scale deployment, since they don't support VLAN trunking, QoS, and what-not. On 3/29/07, Eric ManxPower Wieling <[EMAIL PROTECTED]> wrote:
Noah Miller wrote: > Hi Mike - > >> I have a 501 with traditional power and a 301 with PoE. I rightfully >> assumed >> that the traditional power from the 501 would work on the 301. >> >> How do I get the PoE to work? Do I use the Polycom PoE cable in >> addition to >> whatever PoE injection method I use? I have a Cisco PoE injector that >> works >> on my Cisco AP350 and my 7960. No combination of this injector, the >> Polycom >> cable, and the phone result in success. >> >> I have 18v PoE injectors that I use for other things, but I hear that >> 802.3af is 48v, therefore probably wouldn't work. >> >> How do I use Polycom PoE? > > You'll probably have to get different injectors, or a new PoE switch. > The newer Cisco PoE switches do speak 802.3af, but many of the older > Cisco PoE products do not. The original Cisco PoE implementation was > proprietary and does not conform to 802.3af. Polycom has cables available to support Cisco PoE and 802.3af PoE. They are, however, different cables. _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
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