I have an ARM board with Debian Linux installed and configured to connect via 3G modem (USB) with internet. Conection is configured in chatscripts of ppp. I purchased an static, public IP for my number (t-mobile). After connection I still get dynamic IP. They (t-mobile) say that i have to manually disbale dhcp and set IP they provided - sounds simple, but how to do that with chatscripts? What and where should i add?