[Asterisk-Users] Polycom 501 power over ethernet

Mon Mar 6 14:20:37 MST 2006

Can you provide a photo of this?

I am interested in seeing it!

PaulH

----- Original Message ----- 
From: "Douglas Garstang" <dgarstang at oneeighty.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<asterisk-users at lists.digium.com>
Sent: Tuesday, March 07, 2006 2:13 AM
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
> >
> >
> > _______________________________________________
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> >
> > Asterisk-Users mailing list
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> >    http://lists.digium.com/mailman/listinfo/asterisk-users
>
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