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SPA5xx IP Phone Power Budget

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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