Connect through gigabit port in/out port to RJ45/USB adapter

[NaturalEnquirer]

I have BN1500M2 UPC, Verizon wireless gateway (receives data wirelessly so no in cables, just 2 ethernet outputs with one attached to a switch)

Internet wireless in > Verizon gateway > switch > devices

Current ethernet cable connection:

Wireless router > switch > computer USB/RJ45 adapter

This works fine.

Now I want to run cable through gigabit in/out port on UPC to protect computer (or switch if that would work).

What is not working for me now:

Wireless router > in to switch > > RJ45 out of switch > UPC gigabit in port > UPC gigabit out port > computer USB/RJ45 adapter

Is it because of the USB/RJ45 adapter? Or am I connecting it wrong?

Thanks.

[BillP]

@NaturalEnquirer 

 he Gigabit ports are designed to protect the against surges passing through the network l to a systems network adapter.  

Example:

Wireless router > in to switch > > RJ45 out of switch > UPC gigabit in port > UPC gigabit out port > PC NIC

You would use a the USB to RJ50 cable to connect the PC to the data port for use with PowerChute or a third part application. 

[AdamDfi]

Are there known issues with the RJ45 In or Out port. The in port seems loose and internet keeps going out. When I bypass the UPC in out port internet is flawless.