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tacvbo at tacvbo.net
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 Posted: Tue Jan 29, 2008 1:59 pm Post subject: [asterisk-users] POE draw on Aastra 480i |
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| Quote: | | Quote: | Allen Casteran wrote:
Anyone know what the POE draw is for the Aastra 480i phones?
We have switches that will do 15 watts on 12 ports but only do 7.7 watts on all 24 ports.
A Cisco 3560 switch will do 15.6 watts on all 24 ports.
Just trying to find out if we need that much power.
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| Quote: | Drew wrote:
According to Aastra tech support, 5 watts (peak) per 480i.
We are testing five phones running on a Linksys SRW208P that will only support full 15W on up to
4 of 8 ports. I can power up the switch while all phones are connected without any issues.
I would expect your lower power switch will provide ample power.
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But, PoE class does not matter? Did you plug five Aastra phones?
I'm suspicious about how that scenario worked, I mean, as far as i
know Aastra phones should register as a zero PoE class, that means it
would reserve up to 12.94 watts no matter how many watts uses. So, my
guess here is even if the phone use only 5 watts, the switch already
reserved 12.94 watts for it. I would love to see what happens if you
plug a sixth phone or figure out if you used an Aastra phone. Can you
tell us what model/brand you used?
Dimensioning PoE devices over capable switches has been a new issue
which involves many factors like those described before.
Regards,
PD. Sorry about the original thread break off, I've been unable to
find the original one.
--
Octavio H. Ruiz Cervera
Neocenter, SA. de CV.
http://www.neocenter.com/
Soluciones para Centros de Contacto y Telefon?a IP
Tel.: (+52 55) 8590-9000 Ext. 9016
Mobile: (+55 155) 5514-087790
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ira at extrasensory.com
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| Posted: Wed Jan 30, 2008 4:56 pm Post subject: [asterisk-users] POE draw on Aastra 480i |
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At 07:09 AM 1/30/2008, you wrote:
| Quote: | We have had 5 of the Netgear switches in production for almost a
year now, each powering 5 Aastra 480i phones without any issues whatsoever.
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I have one of the 8 port 4 with POE Netgear boxes powering 3 480i-CT
phones for 2 years or so with zero probalems.
Ira |
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