DIRECTV D12MP Installation Guide - Page 15

DIRECTV Set-Top Box Information for the Installer 4.7 STB Command Prefix 0xFA Required Command Prefix, precedes all commands 4.8 STB Responses Table 4-5: STB Responses List Response Code 0xF0 0xF1 0xF2 0xF3 0xF4 0xF5 0xF6 0xF7 0xF9 0xFB 0xFD 0xFF Response Label ACK_CMD NACK_CMD ACK_PARAMS NACK_PARAMS ACK_FCNOK NACK_FCNOK ACK_RESET NACK_BUSY NACK_INUSE NACK_PREFIX DATA_ERROR CMDBUF_OVFL Description Command Acknowledge Command Unknown Parser received the correct number of parameters Parser timed out when receiving parameters Service command completed successfully Service command completed unsuccessfully Command parser reset - break condition detected A previous service command is pending completion Command parser in use by another device Expected Prefix, prefix not sent Command parser reset - Communication data error Command parser reset - Command buffer DIRECTV, Inc. Version 2.2 Page 15 of 42 March 5, 2008 DTV-MD-0058