can a secondary interface on a router obtain an ip through dhcp?

what kind of phone line do you connect to an FXO for outside access? it takes a rj-45. what kind of phone line is that?

Does CCM need to run on a special server/computer? for example could i run it on a Dell 2450 PowerEdge? also how much does CCM cost?

what is ITS? i've been told in able to get my ip phones to contact the outside world i need to purchase an fxo vic for my 2611 and then upgrade the flash on the router to one with ITS 2.0, then i will be able to assign phone extentions to the individ...

Hello, I'm am relativly new at PIX firewalls and have someone that needs a 501 configured for NAT. How can I do that, and how many IPs do I need? Is it the same as NAT for a router? Any response will be most appreciated.