TX Matrix Field-Replaceable Units (FRUs)

Field-replaceable units (FRUs) are TX Matrix router components that can be replaced at the customer site. Replacing most FRUs requires minimal TX Matrix router downtime. The TX Matrix router uses the following types of FRUs:

• Hot-removable and hot-insertable FRUs—You can remove and replace these components without powering down the TX Matrix router or disrupting the routing functions.
• Hot-pluggable FRUs—You can remove and replace these components without powering down the TX Matrix router, but the routing functions of the system are interrupted when the component is removed.

Table 1 lists the FRUs for the TX Matrix router. If the TX Matrix router contains a redundant host subsystem, the TX Matrix router Control Board (TX-CB), and the Routing Engine are hot-removable and hot-insertable. Before you replace a TX-CB or a Routing Engine, you must take the host subsystem offline (see Taking a TX Matrix Host Subsystem Offline).