Under p442 I leave the password blank correct?
Normally that is correct. If you've already connected the phone to the system on the LAN, then you don't need to enter anything in 442. The system has registered the MAC of the phone.
vlan- not set/can't change (Correct)
dhcp = curently disabled (Should be set to yes in most cases. This is how the phone gets the IP from the local (phone side) router.)
pw/user id for ppp I assume leave blank (Correct)
device number=ext number (No, should be blank)
mfim = public ip of summit router w/above ports forwarded (Correct)
Router ip = internal ip of local router on the phone lan (Correct. This will be auto assigned if you use DHCP)
net mask = 255.255.255.0 (Yes, if that's your LAN configuration. Auto assigned if use DHCP.)
phone ip = lan ip of phone (Yes. Again, DHCP will take care of this.)
Do I need to forward any ports on the phone side router? (Normally no.)