Anonymous_User Absent Member.
Absent Member.
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PoE switches?

Looking at replacing my existing 100baseT switches with Gigabit.
Currently have nothing that requires PoE. There is a chance in 2 or 3
years that we might replace our phone system. Don't know whether we
would go with a VoIP or a converged phone system - the choice would
determine whether I need PoE switches. Go with PoE now or not?

Ken
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34 Replies
grimlock1 Absent Member.
Absent Member.

Re: PoE switches?

On 4/16/2010 10:59 AM, KeN Etter wrote:
> Looking at replacing my existing 100baseT switches with Gigabit.
> Currently have nothing that requires PoE. There is a chance in 2 or 3
> years that we might replace our phone system. Don't know whether we
> would go with a VoIP or a converged phone system - the choice would
> determine whether I need PoE switches. Go with PoE now or not?
>
> Ken


Are you going to run your phones on the same network as your computers?
If so then you have to deal with QOS. If not, then just have a
separate network for the phones and use POE switches for them.

Most IP phones have ethernet passthrough so you can daisy chain a
computer to it and run them all on one network. Be advised that many of
these are 100MB only, not gigabit.

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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

On Fri, 2010-04-16 at 15:59 +0000, KeN Etter wrote:
> Looking at replacing my existing 100baseT switches with Gigabit.
> Currently have nothing that requires PoE. There is a chance in 2 or 3
> years that we might replace our phone system. Don't know whether we
> would go with a VoIP or a converged phone system - the choice would
> determine whether I need PoE switches. Go with PoE now or not?


It might be interesting... but PoE requires a lot more power than a
normal switch (could be the highest consuming device in your datacenter
infrastructure).

We have PoE where I work. For our <500 ports we have a high end network... (we like the best). So where we can spend millions of dollars on our infrastructure, that might not work for you. Do we use PoE?... maybe for a couple of devices... that's it. And yes, we did install it for messing around with VoIP solutions.... but still in R&D phase.

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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

I would go w/ it now, saves the hassle of replacing equipment again
down the road.


--
Stevo
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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

On 16/04/2010 16:59, KeN Etter wrote:
> Looking at replacing my existing 100baseT switches with Gigabit.
> Currently have nothing that requires PoE. There is a chance in 2 or 3
> years that we might replace our phone system. Don't know whether we
> would go with a VoIP or a converged phone system - the choice would
> determine whether I need PoE switches. Go with PoE now or not?


I would say not. There are some significant "green" benefits to a
central POE provision (as opposed to individual injectors at the desk
outlet), not least that you can power down unused phones centrally.
However, if you don't currently have a requirement, you could easily
reach another network refresh before you ever use POE, or failing that,
you can obtain one of those managed power strips (that cut power to
peripherals when the pc is shut off) to power down the injector once the
pc is turned off.

Also worth considering that POE at the switch is an ongoing cost - if
you tie your phones to that, then when you next upgrade your switches,
you have to buy POE that time too, and every time after - while an
injector, once bought, is bought forever.
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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

On Fri, 16 Apr 2010 16:10:44 GMT, Patrick Farrell
<pfarrell@packereng.com> wrote:

>Are you going to run your phones on the same network as your computers?
> If so then you have to deal with QOS. If not, then just have a
>separate network for the phones and use POE switches for them.
>
>Most IP phones have ethernet passthrough so you can daisy chain a
>computer to it and run them all on one network. Be advised that many of
>these are 100MB only, not gigabit.


Thanks. Good points.
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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

On Fri, 16 Apr 2010 16:19:23 GMT, Chris Cox
<cjcox@no-mx.forums.novell.com> wrote:

>It might be interesting... but PoE requires a lot more power than a
>normal switch (could be the highest consuming device in your datacenter
>infrastructure).
>
>We have PoE where I work. For our <500 ports we have a high end network... (we like the best). So where we can spend millions of dollars on our infrastructure, that might not work for you. Do we use PoE?... maybe for a couple of devices... that's it. And yes, we did install it for messing around with VoIP solutions.... but still in R&D phase.


Millions? Not hardly. 🙂 But thanks for the comments.
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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

On 4/16/10 10:59 AM, KeN Etter wrote:
> Looking at replacing my existing 100baseT switches with Gigabit.
> Currently have nothing that requires PoE. There is a chance in 2 or 3
> years that we might replace our phone system. Don't know whether we
> would go with a VoIP or a converged phone system - the choice would
> determine whether I need PoE switches. Go with PoE now or not?
>
> Ken


I would say not. Extra cost for something you "might" do in 2 to 3 years.
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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

On Fri, 16 Apr 2010 16:34:40 GMT, "Stevo" <steveSPAM@LESSccgov.net>
wrote:

>I would go w/ it now, saves the hassle of replacing equipment again
>down the road.


The only hassle is the cost...so that's what I'm debating. Thanks for
the comment.
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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

On Fri, 16 Apr 2010 16:39:49 GMT, Dave Howe
<DaveHowe@ans.nosuchemail.org> wrote:

>I would say not. There are some significant "green" benefits to a
>central POE provision (as opposed to individual injectors at the desk
>outlet), not least that you can power down unused phones centrally.
>However, if you don't currently have a requirement, you could easily
>reach another network refresh before you ever use POE, or failing that,
>you can obtain one of those managed power strips (that cut power to
>peripherals when the pc is shut off) to power down the injector once the
>pc is turned off.
>
>Also worth considering that POE at the switch is an ongoing cost - if
>you tie your phones to that, then when you next upgrade your switches,
>you have to buy POE that time too, and every time after - while an
>injector, once bought, is bought forever.


Thanks for the comments!
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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

On Fri, 16 Apr 2010 17:56:30 GMT, Matthew Good
<systemremovetyrant@gmaildot.com> wrote:

>I would say not. Extra cost for something you "might" do in 2 to 3 years.


That's what I am thinking.
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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

On 4/16/10 1:03 PM, KeN Etter wrote:
> On Fri, 16 Apr 2010 17:56:30 GMT, Matthew Good
> <systemremovetyrant@gmaildot.com> wrote:
>
>> I would say not. Extra cost for something you "might" do in 2 to 3 years.

>
> That's what I am thinking.


As somebody else pointed out, if you are going to use it on your phone
system, I would also recommend keeping it off your data network.
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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

VOIP sucks. FYI.


"KeN Etter" <kle@_remove_this_msktd.com> wrote in message
news:i12hs5d4eq5se5f00bhmefe7i22f18a9i8@4ax.com...
> Looking at replacing my existing 100baseT switches with Gigabit.
> Currently have nothing that requires PoE. There is a chance in 2 or 3
> years that we might replace our phone system. Don't know whether we
> would go with a VoIP or a converged phone system - the choice would
> determine whether I need PoE switches. Go with PoE now or not?
>
> Ken



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adrockk Contributor.
Contributor.

Re: PoE switches?

KeN Etter wrote:

> Looking at replacing my existing 100baseT switches with Gigabit.
> Currently have nothing that requires PoE. There is a chance in 2 or 3
> years that we might replace our phone system. Don't know whether we
> would go with a VoIP or a converged phone system - the choice would
> determine whether I need PoE switches. Go with PoE now or not?
>
> Ken


What kind of switches are you buying? What's the cost difference for
you?
We have Nortel ERS5510s and 5520's. The 5520's are POE and are only a
few hundred more than the 5510's.
That's not a huge impact on price when the switch is a $5K managed
switch, but if you're buying Dell PowerConnect's @ $500 a piece, and
POE costs $300 more, that's a big difference.

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Anonymous_User Absent Member.
Absent Member.

Re: PoE switches?

On Fri, 16 Apr 2010 18:04:33 GMT, Matthew Good
<systemremovetyrant@gmaildot.com> wrote:

>On 4/16/10 1:03 PM, KeN Etter wrote:
>> On Fri, 16 Apr 2010 17:56:30 GMT, Matthew Good
>> <systemremovetyrant@gmaildot.com> wrote:
>>
>>> I would say not. Extra cost for something you "might" do in 2 to 3 years.

>>
>> That's what I am thinking.

>
>As somebody else pointed out, if you are going to use it on your phone
>system, I would also recommend keeping it off your data network.


The majority of the people in our company regularly work with 50-100
MB files. I'm thinking keeping the two separate makes sense.
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