[Asterisk-Users] Polycom 501 power over ethernet
pdhales at optusnet.com.au
pdhales at optusnet.com.au
Mon Mar 6 14:32:54 MST 2006
Totally correct - according to me at least.
PaulH
----- Original Message -----
From: "Ken D'Ambrosio" <ken at jots.org>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<asterisk-users at lists.digium.com>
Cc: <asterisk-biz at thevoipconnection.com>; "Asterisk Users Mailing List -
Non-Commercial Discussion" <asterisk-users at lists.digium.com>
Sent: Tuesday, March 07, 2006 8:25 AM
Subject: Re: [Asterisk-Users] Polycom 501 power over ethernet
> On Mon, March 6, 2006 4:19 pm, pdhales at optusnet.com.au wrote:
> > I have installed several hundred polycom's, and I have never seen a
> > 500/501
> > with a power jack. All with the inline cable, as you mention.
> >
> > Of course, if someone can provide photo evidence I will stand corrected.
>
> I think the confusion here is the different *ways* the 300/500/600 do PoE:
>
> 301 has a power brick, just like (say) a Grandstream.
> 501 has _almost_ PoE: the cable is (as noted above) in-line, but this
> might confuse someone differentiating with the 301.
> 601 has "true" PoE, where you've got your PoE switch, a stock Ethernet
> cable, and the phone -- nothing else, and no special cabling required.
>
> -Ken (purveyor of fine differentiations)
>
> >
> > PaulH
> >
> >
> > ----- Original Message -----
> > From: "The VoIP Connection" <asterisk-biz at thevoipconnection.com>
> > To: "'Asterisk Users Mailing List - Non-Commercial Discussion'"
> > <asterisk-users at lists.digium.com>
> > Sent: Tuesday, March 07, 2006 4:26 AM
> > Subject: RE: [Asterisk-Users] Polycom 501 power over ethernet
> >
> >
> >
> >> I've seen a lot of IP501 and I've never seen one with a power jack.
> >> According to Polycom they all use the cable.
> >>
> >>
> >> Possibly it was an IP500? -Mike
> >>
> >>
> >> Michael Crown
> >> Managing Partner
> >> www.thevoipconnection.com 321.989.6728 ext. 611
> >> sip:611 at voiceserver.thevoipconnection.com
> >>
> >>
> >>> -----Original Message-----
> >>> From: Douglas Garstang [mailto:dgarstang at oneeighty.com]
> >>> Sent: Monday, March 06, 2006 10:13 AM
> >>> To: Asterisk Users Mailing List - Non-Commercial Discussion
> >>> Subject: RE: [Asterisk-Users] Polycom 501 power over ethernet
> >>>
> >>>
> >>> No, some IP 501's have the inline cable and some have the power jack.
> >>>
> >>>
> >>> -----Original Message-----
> >>> From: Paul Hales [mailto:pdhales at optusnet.com.au]
> >>> Sent: Sunday, March 05, 2006 8:59 PM
> >>> To: Asterisk Users Mailing List - Non-Commercial Discussion
> >>> Subject: RE: [Asterisk-Users] Polycom 501 power over ethernet
> >>>
> >>>
> >>>
> >>>
> >>> The IP300/301 has the power jack, the IP500/501 the inline cable.
> >>>
> >>>
> >>> PaulH
> >>>
> >>>
> >>> On Sun, 2006-03-05 at 20:56 -0700, Douglas Garstang wrote:
> >>>
> >>>> Not true. Some do and some don't. Some have a place to plug
> >>>>
> >>> a separate DC adapter, and some have the inline power, where the
> >>> adapter plugs into the ethernet cable. Not sure which ones are newer,
> >>> and which are older.
> >>>>
> >>>> -----Original Message-----
> >>>> From: Michael Welter [mailto:mike at telecommatters.net]
> >>>> Sent: Sun 3/5/2006 6:50 PM
> >>>> To: Asterisk Users Mailing List - Non-Commercial Discussion
> >>>> Cc:
> >>>> Subject: Re: [Asterisk-Users] Polycom 501 power over ethernet
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> The IP501 does not have a power jack. You'll need one
> >>>>
> >>> of the Polycom
> >>>> cables.
> >>>>
> >>>> William M Conlon wrote:
> >>>>
> >>>>> My recollection of the marketing fluff was that we
> >>>>>
> >>> would just use our
> >>>>> legacy network (cables) and the devices at both ends
> >>> would figure out
> >>>>> whether they were sourcing, sinking, or neither. In
> >>> the case of the
> >>>>> 501, it's the special Polycom cable, either with or
> >>>>>
> >>> without provision
> >>>>> for an AC power adapter, that powers the phone.
> >>> That's what I meant by
> >>>
> >>>>> saying the '501' itself is not compliant with 802.3af
> >>> -- it needs a
> >>>
> >>>>> separate thingamajig [tech jargon :)]to be powered.
> >>>>>
> >>>>> Anyway I had hoped that I could just plug a CAT-5
> >>>>>
> >>> patch cable from my
> >>>>> RJ45 wall outlet into the phone.
> >>>>>
> >>>>>
> >>>>> On Mar 5, 2006, at 5:17 PM, Michael Welter wrote:
> >>>>>
> >>>>>
> >>>>>> As I understand 802.3af, the phones go through a
> >>>>>>
> >>> negotiation with the
> >>>>>> unit supplying the power. I don't think it's a
> >>> matter of -48VDC on a
> >>>>>> particular pair. I remember a schematic from years
> >>> ago--it had each
> >>>>>> of the receive pair and the transmit pair going into
> >>> a transformer
> >>>>>> winding, and that winding had a center tap for PoE.
> >>> This is not
> >>>
> >>>>>> something that *I* am going to screw with.
> >>>>>>
> >>>>>> The IP501 telephone set is the same for both PoE and
> >>>>>>
> >>> local power.
> >>>>>> With the PoE cable, the 802.3af electronics (the
> >>>>>>
> >>> negotiator) is a
> >>>>>> plastic thing in the cable. For the local power,
> >>> there is a plastic
> >>>>>> thingie toward the wall end of the cable, and you
> >>> plug the wall wart
> >>>>>> into the plastic thingie. <Notice the advanced
> >>> technical jargon here>
> >>>>>>
> >>>>>> With local power, there is still only one cable one
> >>>>>>
> >>> the desk--the
> >>>>>> power plugs into the cable towards the wall. Except
> >>> for a power
> >>>>>> interruption, this has all the advantages of PoE.
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> William M Conlon wrote:
> >>>>>>
> >>>>>>> I saw that Polycom offered a cable (not stocked
> >>>>>>>
> >>> anywhere), at $40 a
> >>>>>>> pop for 802.3af connections. That's what made me
> >>> think the phone
> >>>>>>> itself is NOT 802.3af compliant. Presumably, for $40, there's
> >>>>>>> more than a fuse in
> >>> that special cable.
> >>>>>>> On Mar 5, 2006, at 4:31 PM, Paul Hales wrote:
> >>>>>>>
> >>>>>>>> For Polycom IP500/501's and IP300/301's you need a
> >>>>>>>>
> >>> special polycom POE
> >>>>>>>> cable.
> >>>>>>>>
> >>>>>>>> When you buy Polycom phones you can usually
> >>>>>>>>
> >>> specify POE or powerpack.
> >>>>>>>>
> >>>>>>>> PaulH
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> On Sun, 2006-03-05 at 16:23 -0800, William M Conlon 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. _______________________________________________
> >>>>>>>>> --Bandwidth and Colocation provided by Easynews.com --
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> Asterisk-Users mailing list
> >>>>>>>>> To UNSUBSCRIBE or update options visit:
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> >>>>>>>>>
> >>>>>>>>
> >>>>>>>> _______________________________________________
> >>>>>>>> --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
> >>>>>>>>
> >>>>>>> Bill
> >>>>>>> William M. Conlon, P.E., Ph.D.
> >>>>>>> To the Point
> >>>>>>> 345 California Avenue Suite 2
> >>>>>>> Palo Alto, CA 94306
> >>>>>>> vox: 650.327.2175 (direct)
> >>>>>>> fax: 650.329.8335
> >>>>>>> mobile: 650.906.9929
> >>>>>>> e-mail: mailto:bill at tothept.com
> >>>>>>> web: http://www.tothept.com
> >>>>>>> _______________________________________________
> >>>>>>> --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
> >>>>>>>
> >>>>>>
> >>>>>> --Michael Welter
> >>>>>> Telecom Matters Corp.
> >>>>>> Denver, Colorado US
> >>>>>> +1.303.414.4980
> >>>>>> mike at TelecomMatters.net www.TelecomMatters.net
> >>>>>> _______________________________________________
> >>>>>> --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
> >>>>>>
> >>>>>
> >>>>> Bill
> >>>>>
> >>>>>
> >>>>> William M. Conlon, P.E., Ph.D.
> >>>>> To the Point
> >>>>> 345 California Avenue Suite 2
> >>>>> Palo Alto, CA 94306
> >>>>> vox: 650.327.2175 (direct)
> >>>>> fax: 650.329.8335
> >>>>> mobile: 650.906.9929
> >>>>> e-mail: mailto:bill at tothept.com
> >>>>> web: http://www.tothept.com
> >>>>>
> >>>>>
> >>>>> _______________________________________________
> >>>>> --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
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>> --
> >>>> Michael Welter
> >>>> Telecom Matters Corp.
> >>>> Denver, Colorado US
> >>>> +1.303.414.4980
> >>>> mike at TelecomMatters.net www.TelecomMatters.net
> >>>> _______________________________________________
> >>>> --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
> >>>>
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> --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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> >>>
> >>>
> >>> Asterisk-Users mailing list
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> >>>
> >>>
> >>>
> >>
> >> _______________________________________________
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> >>
> >>
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> >>
> >>
> >
> > _______________________________________________
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> >
> >
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> >
> >
>
>
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