# Clocking.HBus.AutoFallBack

Not applicable for AG 2000-BRI boards because the availability of network clocking reference is not guaranteed apart from a call session.

For information about setting up CT bus clocking, and rules and restrictions for configuring CT bus clocking, refer to Configuring board clocking.

#### Syntax

Clocking.HBus.AutoFallBack = mode

#### Access

Read only

#### Type

String

#### Default

NO

#### Allowed values

Not applicable.

#### See also

Clocking.HBus.ClockMode, Clocking.HBus.ClockSource