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URGENT! Cisco IP phone PoE using 4-pin cable

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  • URGENT! Cisco IP phone PoE using 4-pin cable

    Hi, there,

    I am going to change the phone of an office from traditional one to cisco IP phone. I plan to use Power over Ethernet. But the lan cable of the office is only 4-pin cable. I want to carry data and power over such cable. Can I adopt PoE using such cables? Please help. Thanks.

  • #2
    Re: URGENT! Cisco IP phone PoE using 4-pin cable

    I don't know jack about Cisco IP phones but I found the answer in a Google search in 45 seconds:

    http://www.cisco.com/warp/public/788...wr_detect.html

    In the above article, it describes each of the 4 qualified Cisco devices for powering IP phones, and which pins are used for each device.

    Looks like 4 pins is the winner but you better read up before you implement. The first 3 devices will work using standard cabling, however, The WS-PWR-PANEL supplies power using the "unused" pairs (pins 4, 5, 7, which means you would need 4 pair cabling if you used this device, or you'd have to custom make your VoIP cables to use pins 4,5, 7, and 8 as these would be the exact opposite of what's used in 10/100/1000 Ethernet (1, 2, 3, and 6)
    Last edited by jasonboche; 25th April 2007, 05:41.
    VCDX3 #34, VCDX4, VCDX5, VCAP4-DCA #14, VCAP4-DCD #35, VCAP5-DCD, VCPx4, vEXPERTx4, MCSEx3, MCSAx2, MCP, CCAx2, A+
    boche.net - VMware Virtualization Evangelist
    My advice has no warranties. Follow at your own risk.

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    • #3
      Re: URGENT! Cisco IP phone PoE using 4-pin cable

      Thank you.

      Comment


      • #4
        Re: URGENT! Cisco IP phone PoE using 4-pin cable

        It is also a good idea to use different colored patch leads to identify the cable that is feeding the PoE device. Makes it easy to identify it in a busy MDF/Patch Panel.
        1 1 was a racehorse.
        2 2 was 1 2.
        1 1 1 1 race 1 day,
        2 2 1 1 2

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        • #5
          Re: URGENT! Cisco IP phone PoE using 4-pin cable

          Hi

          Inorder to use your new Cisco Phone wih PoE you need to have the switch where you LAN is connected should have PoE enabled.

          Then only your enthernet cable will support the PoE

          Regards'

          Prabu
          prabu

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          • #6
            Re: URGENT! Cisco IP phone PoE using 4-pin cable

            Pl snote any cat 6 / cat 5e straight cable should work

            rgds

            prabu
            prabu

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            • #7
              Re: URGENT! Cisco IP phone PoE using 4-pin cable

              Originally posted by biggles77 View Post
              It is also a good idea to use different colored patch leads to identify the cable that is feeding the PoE device. Makes it easy to identify it in a busy MDF/Patch Panel.
              I'm missing why identifying an end device on a panel that likely feeds numerous ones is helpful?
              Thanks,
              Brian Desmond
              Microsoft MVP - Directory Services
              www.briandesmond.com

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              • #8
                Re: URGENT! Cisco IP phone PoE using 4-pin cable

                Originally posted by ssckrp View Post
                Inorder to use your new Cisco Phone wih PoE you need to have the switch where you LAN is connected should have PoE enabled.
                An injector works fine too...
                Thanks,
                Brian Desmond
                Microsoft MVP - Directory Services
                www.briandesmond.com

                Comment

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