[Asterisk-Users] Polycom 501 power over ethernet

William M Conlon bill at tothept.com
Mon Mar 6 14:52:28 MST 2006 

Maybe this can conclude the thread.  This powering arrangement works  
for me:

Netgear FS108 :: Polycom injector cable :: RJ45 coupler :: patch  
cable :: Polycom 501

Some notes:
1.  The Polycom injector cable should be plugged into a POE port on  
the switch (the Netgear FS108 switch has both powered and unpowered  
ports), or the Polycom injector will not source power.
2.  The Netgear FS108 is NOT sourcing power.
3.  The patch cable is a 50-foot CAT5.
3.  To beat a dead horse, the Polycom 501 itself, is NOT a POE phone,  
IMHO.  Caveat emptor.

bill

On Mar 6, 2006, at 1:32 PM, <pdhales at optusnet.com.au> wrote:

> 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:
>>>>>>>>>>> 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
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>>>>>> 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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>>>>>
>>>>>
>>>>>
>>>>
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>>>>
>>>
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>>
>>
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