HTTP only applies to the MP card and is used for WeVoIP and the IP Phone phonebook feature.
TELNET is for the MP/OAS/MGI/SVMi cards

You will need to add your ip range into the management ip whitelist before you can ftp into the svmi.
If you are doing subnets you need to add the broadcast (x.x.x.255) and not the range (x.x.x.0) into the whitelist.