If Error! Reference source not found. is enabled, you will be notified by email
when usage hits 75% and 95% of the monthly allowance.
If Disconnect when usage hits 100% of monthly allowance is checked, this WAN
connection will be disconnected automatically when the usage hits the monthly allowance.
It will not resume connection unless this option has been turned off or the usage has been
reset when a new billing cycle starts.
This setting specifies the health check method for the WAN connection. This value can be
configured as Disabled, PING, DNS Lookup, or HTTP. The default method is DNS