Is it true that only Catalyst 3560E-48PD-SF supports POE for IP Phones on all 48 ports. I wanted to go with 3560E-48PD-S, but on CCO it shows that this model only supports 48/24. Does that mean that only 24 ports out of 48 will be able to supply power to IP Phones.
i think you do not have trouble even with the NON-E 3560 as long as you are using cisco phones. most of them work as lower 6.3V devices and are negotiated automatically by CDP.
Q. What are the power requirements for the various models of the IP phone models?
* CP-7902G (6.3W)
* CP-7905G (6.3W)
* CP-7910-SW (6.3W)
* CP-7910G (6.3W)
* CP-7912G (6.3W)
* CP-7940G (6.3W)
* CP-7960G (6.3W)
* CP-7906G (5W) (Class 2)
* CP-7911G (5W) (Class 2)
* CP-7941G (6.3W) (Class 2)
* CP-7941G-GE (12.9W) (Class 3)
* CP-7961G (6.3W) (Class 2)
* CP-7961G-GE (12.9W) (Class 3)
* CP-7970G (10.25W) (Class 3)
* CP-7971-G-GE (15.4W) (Class 3)
* CP-7985G (12.55W) (Class 0, Not full brightness)
* IEEE 802.3af Device - Class 0 (15.4W)
* IEEE 802.3af Device - Class 1 (4W)
* IEEE 802.3af Device - Class 2 (7W)
* IEEE 802.3af Device - Class 3 (15.4W)
The difference between the 3560E-48PD-S and the 3560E-48PD-SF is the installed PSU. The -SF ships with the 1150W PSU while the -S has the 750W unit. Do the math 48 ports at 15.4W is 739.2W, and the switch itself needs more than 10.8W to operate so with the smaller PSU there is not enough power to provide ALL 48 ports with the full 15.4W required by the 802.3af standard. There are many devices that can operate at the lower 'cisco pre-standard' power level of 7.7W that could be supported on all 48 ports with the 750W PSU. But since the switch is documented as an 802.3af standard switch they can only claim to support 24 ports with the smaller PSU.