Description: This attribute defines the source of the transmit clock for the JT2 line. When the clocking source is selected from local, the oscillator on the port generates the clocking for the line. When the clocking source is selected from line, the port synchronizes to the clock recovered from the incoming line signal. When the clocking source is selected from module, the port's clock synchronizes to the clock provided by the oscillator on the active CP. Note:- that when one port is set to local, the other port must also be set to local, and when one port is set to module, the other port must also be set to module. If one of the ports is set to line, the other port must be set to otherPort. Also, if a CP reference clock is available when the JT2 component is added, the clocking source defaults to module, whereas if a CP reference clock is not available when the component is added, the clocking source defaults to local.