Specifications

UDM Hub Control Protocol
111
UDM-0404 4x4 Multi-Format Distribution Hub
Input type can have the following values:
Return Status:
Disconnect Port
Disconnects the current input from the Port specified by the Port property, or if non-zero, from the port
specified in the command.
Return Status:
Input Cascade Selection
Each input in the UDM can either come from the VGA connector on the hub or from the cascade connector of
another upstream hub. This command selects this option for each of the four VGA ports.
Cascade value takes the following values:
Return Status:
Lock Port
Locks the port (or range of ports) specified by the Port property, or if non zero, the port specified in the
command, so that the connected input may no longer be changed on that port.
Return Status:
Value Description
0 VGA
1 Composite (CVBS)
2 S-Video
3 Component analog (YPbPr)
4 TV (from TVM)
Byte # 0 1 2 3 4 5
Byte value 1 Status Port Input Selected Sub Input Input Type
Byte #012345
Byte value 6 User Defined Port User Defined User Defined User Defined
Byte # 0 1 2 3 4 5
Byte value 6 Status Port User Defined User Defined User Defined
Byte #012345
Byte value 9 User Defined Input Cascade value User Defined User Defined
Value Description
0 No cascade - VGA input
1 Cascade from upstream hub
Byte # 0 1 2 3 4 5
Byte value 9 Status Port User Defined User Defined User Defined
Byte #012345
Byte value 2 User Defined Port User Defined User Defined User Defined
Byte # 0 1 2 3 4 5
Byte value 2 Status Port User Defined User Defined User Defined
The status return is a copy of the command with the first user defined byte replaced
by a status value - status values are described in a separate section.