Specifies the trunk to use as an external network timing reference if the clock source defined with Clocking.HBus.ClockSource fails.
For more information about setting up CT bus clocking and about the rules and restrictions that apply to setting up clocking with CG 6565C boards, refer to Configuring board clocking.
Clocking.HBus.FallBackNetwork = trunk_number
Read/Write
Integer
1
1 to 16 (1-based trunk number)
Clocking.HBus.FallBackNetwork = 1
The board must have multiple external network connections and the Clocking.HBus.FallBackClockSource keyword must be set to NETWORK to take effect.
The Clocking.HBus.FallBackNetwork entry is a ones-based number, while the x entry in the NetworkInterface.T1E1[x].Type keyword is a zero-based number.