D-Link DWR-980 User Manual page 130

DWR-980 Wireless AC1200 4G LTE Router with VDSL2 Support,
Gigabit Ethernet Ports, and 2 FXS Ports
User Manual
Parameter
Number of inspections
of active connection
Number of inspections
of inactive connection
When all needed settings are configured, click the APPLY button.
A number of requests that will be sent in order to analyze the status
of the main connection when the connection is active (the router
uses the main connection as a default gateway).
A number of requests that will be sent in order to analyze the status
of the main connection when the connection is inactive (the router
uses the reserve connection as a default gateway).
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Configuring via Web-based Interface
Description