Strictly a modem, does not have the capability to dynamically assign an IP address to any hosts. Use modem manual for configuration (Especially Section 3.1)
Configuring on a computer with more than one Ethernet interface requires that you temporarily disable one of them, due to the 8616's lack of DHCP services. So, issue a terminal command of "ifconfig eth0 down" before configuring the modem. The modem only requires a VPI and VCI. It is not necessary to specify PVC2.