Configuration of TCP Gateway for TTN

Hi Experts,

I am new to the Lora technology and Things network. I am going through online tutorial about “Gateway Registration in TTN” and I got following doubts.
Can we register TCP gateway or anyother gateways apart from Lora gateway in TTN? If yes, how?
How we can configure Raspberry PI-3 as TCP gateway in that case?
What type of packet forwarder can be used?

Thank you

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RAK831
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