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Hello,
Thanks for contacting TELTONIKA | Crowd-support forum.
Kindly be informed that Bidirect Mode has only TCP Protocol for both firmware version RUT9_R_00.06.08.5 and RUT9_R_00.07.00.
Please note that there’s just one IP address of the server that the client will connect to.
More information can be found here.
https://wiki.teltonika-networks.com/view/Bidirectional_communication_between_two_serial_devices_over_TCP/IP
Best Regards,