A chassis arrangement includes different depth cards with associated Faraday cages. The chassis arrangement provides support for a first set of cards at a first depth and with a first set of fans, the chassis forming a Faraday cage with either set of cards. The second depth can be greater than the first depth, providing additional space for components to support additional functionality. Changing the first set of fans with the second set of fans and upgrading the first set of cards to the second set of cards is performed in-service, extending a life span of the chassis through in-service upgrades to multiple chassis configurations.