11-07-2012 01:43 AM - edited 03-21-2019 06:32 AM
Hi,
I'm desperately trying to find out the PoE power requirements for the Cisco SPA 514G IP telephone. I've found the data on the 504G but nothing for the 514G.
I know it supports IEEE 802.3af but I can't find the specific detail anywhere that will confirm that I can run 48 of them on either a Cisco Catalyst 2960S-48LPS-L or a Catalyst 2960-48PST-L PoE enabled switch (i.e. that the total power draw won't go over 370W).
Can anyone help?
Thanks in advance
Martin
12-21-2015 12:24 PM
Hi,
I have also been unable to find this specific information.
However, the power supply is 5 volts / 2 amps.
Cisco PA100 Power Supply for Small Business VoIP - 5V 2A.
That gives you 10 watt max output.
I would guess that these phones use between 7w-10w, with 10w max.
http://www.rapidtables.com/convert/electric/Amp_to_Watt.htm
Hope this helps!
Marco
12-21-2015 01:42 PM
Switch's PoE management is based on device's 802.3af declared current draw, not the true draw one.
Taken from documentation:
Parameter
|
Description
|
---|---|
PoE Power Required |
Specifies the PoE power setting: Normal (default) or Maximum. Then one or more attendant consoles are attached to the phone, use Maximum to advertise to a PoE switch that the phone will consume up to 12 watts. Then no attendant consoles are attached, use Minimum to advertise a required power budget of 6.5 watts. This parameter is not applicable to Cisco SPA301 or SPA303 as they do not have Cisco Attendant Console support. |
48*6.5W = 312W thus 370W sounds enough. Assuming phones have no attendant consoles attached.
For measured draw of SPA50x/SPA525 see: SPA 504G Power Consumption
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