[Asterisk-Users] Polycom 501 power over ethernet
The VoIP Connection
asterisk-biz at thevoipconnection.com
Mon Mar 6 10:26:51 MST 2006
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:
> > >>>>> 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
> > >>> 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
>
> _______________________________________________
> --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
>
>
More information about the asterisk-users
mailing list