I'm looking around to buy a Cisco layer 3 switch for my CCNP home study lab and it seems like the WS-C3550-48-EMI is a good choice. I also want to learn Cisco VOIP but I don't know anything about equipment requirements for learning VOIP. Can anyone give me some recommendations? Should I buy a 3550 with PoE? Is there a different switch you would recommend? Thanks in advance for any guidance you can provide.