What 9-bit serial format is supported by Sealevel SeaLINK Ethernet serial servers?

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Sealevel SeaLINK Ethernet serial servers support a 2-byte format to marshal 9-bit serial data between the host computer and the serial server. The least significant bit of the first byte is the 9th bit of the serial frame and the second byte is the first 8 data bits of the serial frame. SeaLINK Ethernet serial servers also support 9-bit serial tunneling.