Troubleshooting the TX-SIB Adapters When an RX LED Is Not Steadily Green

Problem

The RX LED next to any of the five TX-SIB adapters is not steadily lit green.

Solution

1. Disable the adapter receivers.
   user@host> request chassis sib slot slot-number stop-receiver interface-number scc

   The slot number can be from 0 through 4 and corresponds to the TX-SIB chassis slot. The interface number can be 0 through 3 and corresponds to the TX-SIB adapters labeled LCC0 through LCC3.

2. Remove the loopback connector.
3. Clean the loopback adapter and the TX-SIB adapter. For cleaning instructions, see Cleaning the TX Matrix and T640 Fiber-Optic Components Overview.
4. Reconnect the fiber-optic array adapter and the loopback connectors:
   1. Align the loopback connector with the TX-SIB adapter, and carefully press it into the adapter until it stops. The loopback connector and TX-SIB adapter are keyed to ensure proper mating.

      Note: The optics in a fiber-optic array adapter are spring loaded, so you must continue to apply force to a fiber-optic array cable connector or loopback connector while securing it to a TX-SIB or T640-SIB adapter.

   2. Using a 2.5-mm ball hex driver, at least 4 in. long, partially tighten the upper and lower hex screws on the loopback connector. Alternate between the upper and lower hex screws until the loopback connector is secured to the adapter.
5. Enable the TX-SIB adapter receivers
   user@host> request chassis sib slot slot-number start-receiver interface-number scc

   The slot number can be from 0 through 4 and corresponds to the TX-SIB chassis slot. The interface number can be 0 through 3 and corresponds to the TX-SIB adapters labeled LCC0 through LCC3.

6. Verify that the RX LED next to the TX-SIB adapter is steadily lit green.
7. If the RX LED next to the TX-SIB adapter is still not steadily lit green, contact your customer support representative for additional instructions. Do not proceed with the installation of the TX Matrix router until you have spoken to your customer support representative.