Billion BiPAC 7402(G)X(L) Series User Manual page 65

(802.11g) ADSL2+ (VPN) Firewall Router
Main Port - Dual WAN
In dual wan mode, it supports failover function. When WAN1 fails, it will switch to WAN2, and when
WAN1 is OK, it will switch to WAN1 again.
Main Port: Select Dual WAN.
Mode Failover: Set to trigger ADSL / 3G failover function ready.
WAN1: Select "ADSL" "EWAN" or "3G" mode for WAN1.
WAN2: Select the left WAN mode for WAN2 as backup port. E.g. If 3G is set for main port, then there can
be no option for failover/failback.
Time Schedule: A self defined time period. You may specify a time schedule for failover/failback
functioning. For setup and detail, refer to Time Schedule section.
Keep Backup Interface Connected: Select Enable this function, the backup port WAN2 will connect
always.
Connectivity Decision: Set how many times of probing failed to switch backup port.
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Chapter 4: Configuration