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DIRECTV Set-top box information for the installer
4.4 STB Command Prefix
0xFA
Required Command Prefix, precedes all commands
4.5 STB Responses
Response
Response Label
Code
0xF0
ACK_CMD
0xF1
NACK_CMD
0xF2
ACK_PARAMS
0xF3
NACK_PARAMS
0xF4
ACK_FCNOK
0xF5
NACK_FCNOK
0xF6
ACK_RESET
0xF7
NACK_BUSY
0xF9
NACK_INUSE
0xFB
NACK_PREFIX
0xFD
DATA_ERROR
0xFF
CMDBUF_OVFL
DIRECTV Proprietary
Version 1.1.a
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
Page 16 of 49
November 17, 2005
DTV-MD-0058
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