Verifone PinPad 1000se - Packet Setup - Pls Help

I cannot figure out what format the packet needs to be to send and receive data via Serial (usb).
With a Com port viewer I can see only the EOT symbol when the cancel button is
pressed on the keypad.
I have tried Hex, ASCII, DEC, base64 and Binary. Just cant communicate with this device. All communication protocol settings are correct.
- Half Duplex - 9800 Baud rate - 7 data bits - Even Parity - 1 stop bit
Any hint would be very helpful. Thanks.
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