[CAUSE] The tmnxInterChassisCommsDown alarm is generated when the active CPM cannot reach the far-end chassis. [EFFECT] The resources on the far-end chassis are not available. This event for the far-end chassis means that the CPM, SFM, and XCM cards in the far-end chassis will reboot and remain operationally down until communications are re-established. [RECOVERY] Ensure that all CPM interconnect ports in the system are properly cabled together with working cables.