Try to ping WAN interface ip : # Ping 216.164.164.218
Try to ping LAN interface ip : # 10.130.52.1
Try to ping Voice interface ip : # 10.130.42.1
And ping Mgmt interface ip : # 10.130.10.1
Thanks,
Praveen.N
Command prompt---------------------#Sh ip config Ping the primary DNS and Secondary DNSBoth DNS ping means there is no issue with ISP , not pinging means issue with ISP.Thanks,Praveen.N