# Clocking.HBus.ClockMode

Specifies the board's control of the H.110 clock.

For more information about setting up CT bus clocking and about the rules and restrictions that apply to setting up clocking with CG 6060 boards, refer to Configuring board clocking.

#### Syntax

Clocking.HBus.ClockMode = clockmode

#### Access

Read/Write

#### Type

String

#### Default

STANDALONE

#### Allowed values

MASTER_A | MASTER_B | SLAVE | STANDALONE

#### Example

Clocking.HBus.ClockMode = MASTER_A

#### Details

Valid entries include:

Value | Description
--- | ---
MASTER_A | The board drives the CT bus A_CLOCK based on the timing information derived from a specified timing reference.
MASTER_B | The board drives the CT bus B_CLOCK based on the timing information derived from a specified timing reference.
SLAVE | The board acts as a clock slave, deriving its timing from the primary bus master. Connections are allowed to the board's CT bus timeslots in slave mode.
STANDALONE | The board behaves like a primary clock master, but does not drive any CT bus clocks. Connections are not allowed to the board's CT bus timeslots in standalone mode.

For more information, refer to the Switching Service Developer's Reference Manual.

#### See also

Clocking.HBus.AutoFallBack, Clocking.HBus.ClockSource, Clocking.HBus.FallBackClockSource, Clocking.HBus.FallBackNetwork, SwitchConnections