Cisco SLM248GPS 48-port 10/100 + 4-port Gigabit does really support PoE???

Unanswered Question
Sep 14th, 2009


Any of you know if this model has problems to power IP phone models 7940, 7960.

when I connect these models thet don't turn on, models 7911 works fine.


I have this problem too.
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Leo Laohoo Mon, 09/14/2009 - 14:30

PoE on forty-eight 10/100 ports supplies up to 7.5W per port, or on twenty-four 10/100 ports supplies up to IEEE 802.3af maximum of 15.4W per port

filiberto.aguirre Thu, 09/17/2009 - 08:08

Hi Leolaohoo,

Thanks for your info.

what I don't understand is that if I connect a 7970 IP phone the switch can power it, but 7940/7960 can not be powered on.

7970 required 10.25 W, 7940/7960 just required 6.3 W but they are not powered.

that's my doubt..why???


Leo Laohoo Thu, 09/17/2009 - 16:13

How many PoE ports are using PoE and what's their total consumption? Maybe there is an over-subscription somewhere? Have you put your 7940/7960 into a different PoE switch?

filiberto.aguirre Fri, 09/18/2009 - 06:14

Hi Leolahoo,

I'm just connecting 3 ip phone (7911,7940, 7960) and I have also connected the IP phone 7940/7960

in other linksys switch and they are powered on without problem.



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