The rugged XR4000 system can consist of stackable units if additional compute is required. They can also be rack mounted if a depot has the capability. The simplest method to add another XR4000 would be to create a new cluster and let that run independently. This may be practical in cases where a depot may be spread across multiple floors of a building.
When scaling at the depot, it is critical to assess the impact on the 5G network and if it can handle the additional load.