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mb850t at gmail.com
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 Posted: Mon Jul 07, 2008 12:17 pm Post subject: [asterisk-users] Cisco 7940 not getting PoE from Linksys SLM |
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Anybody have ideas on how I can troubleshoot? From what I've read
cisco VoIP phones should be able to get PoE from these switches. I'm
using a straight-through cat5e cable. Plug the phone in and nothing.
Is there anyway I can test the PoE switch (it was a refurb unit from
CDW) w/out having a PoE device? Thanks-
Matt |
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kkielhofner at star2st...
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| Posted: Mon Jul 07, 2008 12:28 pm Post subject: [asterisk-users] Cisco 7940 not getting PoE from Linksys SLM |
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On 7/7/08, M B <mb850t at gmail.com> wrote:
| Quote: | Anybody have ideas on how I can troubleshoot? From what I've read
cisco VoIP phones should be able to get PoE from these switches. I'm
using a straight-through cat5e cable. Plug the phone in and nothing.
Is there anyway I can test the PoE switch (it was a refurb unit from
CDW) w/out having a PoE device? Thanks-
Matt
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The switch you're using supports IEEE 802.3af standard PoE. The phone
(7940) supports pre-standard "Cisco in-line power". There are some
various hacks for this situation scattered around the internet.
--
Kristian Kielhofner
NOT sent from my iPhone or Blackberry |
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cory at voipsupply.com
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| Posted: Mon Jul 07, 2008 12:37 pm Post subject: [asterisk-users] Cisco 7940 not getting PoE from Linksys SLM |
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If it is an older pre-802.3af phone it wants CDP, you will need to
crimp a reverse polarity cable or buy an online CDP converter. Search
"cisco cable" on voip-info
Cory Andrews
Director of New Business Initiatives
-----------------------------------------
Sayers Media Group
Candrews at SayersMedia.com
716-601-4474
-----------------------------------------
*sent from my iPhone
On Jul 7, 2008, at 1:17 PM, "M B" <mb850t at gmail.com> wrote:
| Quote: | Anybody have ideas on how I can troubleshoot? From what I've read
cisco VoIP phones should be able to get PoE from these switches. I'm
using a straight-through cat5e cable. Plug the phone in and nothing.
Is there anyway I can test the PoE switch (it was a refurb unit from
CDW) w/out having a PoE device? Thanks-
Matt
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