Communication between the client and server occurs through a serial data link operating at 19.2 K in a "wakeup" mode,eight data bits, a ninth ‘wakeup’ bit, and one stop bit.
According to this protocol, the server needs to read the 9th bit (the parity one) and to decide by itself if that's the start byte of a new message (parity bit is "1") or (parity bit is "0").