How do I change the "inside" interface ip on PIX 501-50?In PDM when I do this it just goes out to lunch??!!...then eventually comes back with it's original 192.168.1.1

Is there a way to block internal extensions from calling each other?

I just put in a new 7970 phone and the time and date are incorrect. Does anyone know where to change this? All other phones, 7940 and 7960 are correct.