M B
2008-Jul-07 17:17 UTC
[asterisk-users] Cisco 7940 not getting PoE from Linksys SLM224P
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
Kristian Kielhofner
2008-Jul-07 17:28 UTC
[asterisk-users] Cisco 7940 not getting PoE from Linksys SLM224P
On 7/7/08, M B <mb850t at gmail.com> wrote:> 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 >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
Cory Andrews
2008-Jul-07 17:37 UTC
[asterisk-users] Cisco 7940 not getting PoE from Linksys SLM224P
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:> 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 > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > AstriCon 2008 - September 22 - 25 Phoenix, Arizona > Register Now: http://www.astricon.net > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users