DIRECTV Set-Top Box Information for the Installer
DIRECTV, Inc.
March 5, 2008
Version 2.2
Page 16 of 42
DTV-MD-0058
5 Data Port Command Details
All parameters specified by square brackets “[ ]” are one (1) byte in length.
5.1 Standby (0x81)
Command Label
Standby
Command Byte
0x81
Input Parameter(s)
None
Return Data Stream
None
Return Response
ACK_FCNOK
: Always Success
Return Value
0x0000
: Always Success
Description
The STB will execute a Standby command by placing the STB in the "low power"
mode where the audio and video processing is disabled.
This command has the same effect as turning the box "off" by pressing the front panel
power button.
Example: Turn off the STB.
Controller -> STB: FA
(Command Prefix)
Controller -> STB: 81
(Command ID)
STB -> Controller: F0
(Command acknowledged)
STB -> Controller: F4
(Command completed successfully)
5.2 Active (0x82)
Command Label
Active
Command Byte
0x82
Input Parameter(s)
None
Return Data Stream
None
Return Response
ACK_FCNOK
: Always Success
Return Value
0x0000
: Always Success
Description
The STB executes this command by placing the STB in the operational mode.
This command has the same effect as turning the box "on" by pressing the front panel
power button.