I would have a Cisco Installation with a Linksys Switch SRW224P 24 puertos PoE.
As far as I known, Cisco 7911 and 7941 are compatible with that switch, but I am afraid of the swith not having enough power for all 24 ports...
Power feeding of Ethernet is provided on the 10/100 Base-T ports with maximum output power per port of up to 15.4W simultaneously on 12 ports. Alternatively, the switch can power all ports at a maximum of 7.5 W per port.
So, it can power either 24 ports or only 12 ports (half) depending on phone voltage requirements...
Question: Would ALL my Cisco phones work on all the ports of the swith ?
You should be fine for power as both the 7911 and 7941 are Class 2 devices. Have a look;
The 7940G/7941G and 7960G/7961G are class 2 devices (7.7 watts) and the 7941G-GE/7961G-GE phones are class 3 devices (15.4 watts).These are not configurable settings.
Have a look;
7910/7940/7960 Power requirements;
The Cisco IP Phone 7911G supports both Cisco inline power and IEEE PoE (Class 2).
From this doc;
Hope this helps!