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Wired Networks Thread, Power over Ethernet (PoE) in Technical; Hi everyone, This is my first post, If anyone can help me by giving advice , I'll greatly appreciate it. ...
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    Power over Ethernet (PoE)

    Hi everyone,

    This is my first post, If anyone can help me by giving advice , I'll greatly appreciate it.
    My question is, is it possible to use HP ProCurve Switches as a mix of PoE and none PoE. Will there be any complication, traffic wise in the network? We have a future idea of implementing VOIP. hence I thought of replacing the faulty switches with the PoE switches. Or is there any alternative to this?

    Please help me in this of what to do. Thanks in advanced.

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    jamesreedersmith's Avatar
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    Just use POE switches and non-poe devices will ignore the power.

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    Dependant on how many PoE devices, if budget stretched and PoE devices limited you could always purchase PoE injectors to place between Switch and end node (i.e. Wireless access point etc). But would be better as jamesreedersmith said to purchase a PoE switch if even a small one dependant on your network layout and as mentioned non PoE compliant devices would ignore the power.

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    Quote Originally Posted by boolyn View Post
    is it possible to use HP ProCurve Switches as a mix of PoE and none PoE.
    As pointed out above, yes. You can buy PoE injectors to enable PoE on a per-port basis. You can also buy PoE "midspans", which look like a rack-mountable switch and do the same function as a PoE injector, just for 4 / 8 / 16 / etc ports at a time. They can look a bit neater than PoE injectors, less cables floating around inside your switch cabinet, although individual PoE injectors are generally fanless, which is a consideration should you need your switch cabinet to be silent.

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    Thanks everyone for your advice, it helps me a lot.
    Thanks again.
    Dave

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    When we deployed our new network we put a POE at the top

    48 port POE switch > patch > 48 port switch > patch > patch > 48 port switch > patch

    These where 2960S deployed in a stack configuration so the switch acted as one unit.

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    Just want to thank everyone who replied.

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    Depending on the devices you need to connect to the POE-switch, look at the max power it can output over all ports.
    We use POE access points and they use (if I remember correctly) 14 watt and our 48port Cisco switch can not handle more then 15-20 POE AP`s, because it lacks the power.
    The same switch but with 24 ports outputs the same amount of watts, so we where better of buying 2 x 24 ports instead of 1 x 48 ports switch.

    If you will only use it for voip phones, you`re fine with a 48 ports. (phone uses 7-8watt)

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