[Asterisk-Users] Polycom 501 power over ethernet

pdhales at optusnet.com.au pdhales at optusnet.com.au
Mon Mar 6 14:19:37 MST 2006 

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.

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
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> > >
> > >
> > > _______________________________________________
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>
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