the default IP of the router is usually 192.168.1.1/ 255.255.255.0 if you mean the ip that you get when you connect to telone, this is assigned to you automatically by DHCP when you connect with the modem PPPoE settings, its usually within the 10.10.0.0 range somewhere, i cant remember the subnet mask put the default gateway that your wan side of the connection is 10.10.0.1
NOTE these ip addresses are private ip addresses, so you wont be able to access the first one outside of your home network, and you wont be able to access the 10.10 IP's outside of telone's network
to find your public address when connected, whatismyip.org can tell you it, but it is not needed for modem setup, as telone only do dynamic ip's on ADSL and use CG-NAT anyway so you never see it on any of your modem/router devices