We currently have purchased several Dell Mobile managed carts that come with a PowerConnect 3548 switch.   The premise behind it is to allow us to remotely manage multiple client devices that are in the cart.  My question is how is the switch connecting to the network since it is in a Mobile device and not in a secure switch closet?  Can it be in unmanaged mode so that we can connect it to any jack in our building and do updates, or does it have to be configured and connected to a trunk port on a specific jack/port on an existing switch that is also in trunk mode which would mean I would have collect 30+ mobile carts and bring them all to a central location that is configured to support this?

If so, it to me defeats the purpose of having it.  If I have to go around and collect these carts.  the switch closets are not large enough to accommodate a cart and I can not have office or classroom jacks configured in trunk mode.  Has anyone used these carts and how do they have them configured.