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### Instruction:
CLKCTRL-3-INVALID_64K_INPUT
### Response:
(Severity: 3), (Category: PLATFORM), (Description: The 64k composite clock signal has been invalidated possibly due to loss-of-signal condition or AMI violations.), (Recommended Action: 1) Ensure cable connection between the configured interface port and external equipment. 2) Ensure valid 64kHz + 8kHz Japanese timing signal(defined in G.703 Appendix II.1) is applied at input port.)
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