Juniper Networks EX9200-40T - expansion module - Gigabit Ethernet x 40

The line cards in EX9200 switch provides packet forwarding services. It is field-replaceable units (FRUs) that can be installed in the line card slots on the front of the switch chassis. The line cards are hot-insertable and hot-removable: You can remove and replace them without powering off the switch or disrupting switch functions.