sleep ping bat cmd pause ping -n 1 -w 100000 192.168.254.254 >nul

mpd 3G ping GPRS lcp set link keep-alive 0 1

Mar 19 13:22:37 mpd: [L-1] LCP: no reply to 1 echo request(s)
Mar 19 13:22:47 mpd: [L-1] LCP: no reply to 2 echo request(s)
Mar 19 13:22:57 mpd: [L-1] LCP: no reply to 3 echo request(s)
Mar 19 13:23:07 mpd: [L-1] LCP: no reply to 4 echo request(s)
Mar 19 13:23:17 mpd: [L-1] LCP: no reply to 5 echo request(s)
Mar 19 13:23:27 mpd: [L-1] LCP: no reply to 6 echo request(s)
Mar 19 13:23:37 mpd: [L-1] LCP: no reply to 7 echo request(s)

ping W7
netsh firewall set icmpsetting 8 enable
netsh firewall set icmpsetting 8 disable