asus rt-n16 pppoe with jdownloader reconnect

#!/usr/bin/expect
spawn telnet 192.168.1.1
expect login:
send admin\r
expect Password:
send admin\r
send "killall pppd &\r"
send "nohup /usr/sbin/pppd file /tmp/ppp/options.wan0 nodetach &\r"
send exit\r
interact

save as a script file, than jdownloader can use it to reconnect.