Q: Can the ESW520-24P switch with a total power budget of 180 watts support support 20 SPA5xx IP phones?
A: Yes
Details:
Cisco Product Engineers connected 21 SPA5xxG IP phones to an ESW 24 port switch.
With all 21 phones powered up and idle, the switch reported a total consumption of 63W out of the available 180W
Here is the PoE output per port and the phone models connected to each port
Nominal PoE draw ~ 65W. Total budget = 180W
Switch Console output
Unit Power Nominal Power Consumed Power Usage Threshold Traps
---- ------- ------------- ------------------ --------------- ---------
1 On 180 Watts 63 Watts (35%) 95 Disable
Total 21 SPA phones
Qty 2 SPA525G2
Qty 9 SPA525G
Qty 3 SPA502
Qty 2 SPA504
Qty 2 SPA508
Qty 3 SPA509
Qty 2 SPA500S - Side Car
===========
1/e1 ENABLE 15.4 W 2300 mW SPA509
1/e2 ENABLE 15.4 W 2500mW SPA525G
1/e3 ENABLE 15.4 W 3500mW SPA525G2
1/e4 ENABLE 15.4 W 2800mW SPA509
1/e5 ENABLE 15.4 W 2300 mW SPA502
1/e6 ENABLE 15.4 W 3500mW SPA525G
1/e7 ENABLE 15.4 W 3800mW SPA525G
1/e8 ENABLE 15.4 W 3400 mW SPA525G 4200 3 way call
1/e9 ENABLE 15.4 W 2600mW SPA502
1/e10 ENABLE 15.4 W 3900mW SPA525G
1/e11 ENABLE 15.4 W 3700mW SPA508 w side car 32 leds on
1/e12 ENABLE 15.4 W 0 mW
1/e13 ENABLE 15.4 W 3600 mW SPA525G
1/e14 ENABLE 15.4 W 4100mW SPA525G2 w side car
1/e15 ENABLE 15.4 W 3300mW SPA525G
1/e16 ENABLE 15.4 W 2300mW SPA504
1/e17 ENABLE 15.4 W 2100 mW SPA502
1/e18 ENABLE 15.4 W 2300mW SPA504
1/e19 ENABLE 15.4 W 3900mW SPA525G
1/e20 ENABLE 15.4 W 2500mW SPA509
1/e21 ENABLE 15.4 W 3200mW SPA525G
1/e22 ENABLE 15.4 W 2600mW SPA508
1/e23 ENABLE 15.4 W 0 mW
1/e24 ENABLE 15.4 W 0 mW
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