The KAD/CBM/103 extracts valid CCDL/MCDL messages from incoming serial streams. It coherently extracts certain words from these messages and saves them to specified locations in the telemetry frames (parser). The KAD/CBM/103 parses CCDL/MCDL bus traffic and tags each message for up to four CCDL/MCDL busses. It combines a coherent message parser and a message counter with error detection functions in a single module.