from the FAQ, https://aws.amazon.com/data-transfer-terminal/faqs/

    - What is the connection type?

    - Each Data Transfer Terminal facility will have at least two (2) 100G optical fiber cables that are connected to the AWS network.


    - What are the key requirements for preparing my device to use the Data Transfer Terminal facility?

    - To prepare for using the Data Transfer Terminal facility and connecting to the network, you need to ensure your uploading device is prepared to connect to the network. You should have the following for an optimal data upload experience:
        • A transceiver type 100G LR4 QSFP
        • An active IP auto configuration (DHCP)
        • Up-to-date software/transceiver drivers

Also, from https://aws.amazon.com/data-transfer-terminal/pricing/:

    Per port charge for data transfer

    US to US @ $300
    US to EU @ $500
    US to Other @ Contact us