145To specify an Sa bit for the SSM of a BITS clock:Step Command Remarks1. Enter system view. system-viewIn an MDC environment, youcan perform this task only onthe default MDC. However,the setting takes effect on allMDCs.2. Specify an Sa bit for the SSMof a BITS clock.• In standalone mode:network-clock source { bits0 | bits1 }sa-bit { sa4 | sa5 | sa6 | sa7 | sa8 }• In IRF mode:network-clock chassis chassis-numbersource { bits0 | bits1 } sa-bit { sa4 |sa5 | sa6 | sa7 | sa8 }By default, BITS clocks use Sa4 to transmit the SSM.Configuring the timing direction of a BITS clockYou can configure a BITS clock to derive its timing from an external clock reference or provide timing forexternal devices.To configure the timing direction of a BITS clock:Step Command Remarks1. Enter system view. system-view N/A2. Configure the timingdirection of a BITS clock.• In standalone mode:network-clock source { bits0 | bits1 }direction { in | out }• In IRF mode:network-clock chassischassis-number source { bits0 |bits1 } direction { in | out }The default timing direction isinbound. BITS clocks derivetheir timing from an externalclock reference.This command is configurableonly on the default MDC.However, the command settingtakes effect on all MDCs.Setting the frequency of a BITS clockYou can set the frequency of a BITS clock to 2 Mbps or 2 MHz.To configure the frequency of a BITS clock:Step Command Remarks1. Enter system view. system-view N/A
