Specifications

UDM Hub Control Protocol
116
UDM-0404 4x4 Multi-Format Distribution Hub
Reset Controller
Resets the controller - reboots as though powered on - second 156 (inverted 99) in packet is to guard against
accidental resets.
Return status:
Set Protocol
Determines protocol settings for communications and operations.
Various values and descriptions are shown below:
Response Protocol:
Return status:
Set Port Range
Sets the Port property for the hub. This property value may be used in subsequent action commands. A range
may be specified using the min and max values, if max is equal to the min then a single value will be used.
Return status:
Status Values
Status replies can be either general or specific to certain commands. Status values are always returned in the
byte after the returned command in the returned status packet. In general, success is indicated by a single
value, failure is indicated by as specific a return value as possible.
Byte #0123 4 5
Byte value 99 User Defined 156 User Defined User Defined User Defined
Byte # 0 1 2 3 4 5
Byte value 99 Status 156 User Defined User Defined User Defined
Byte # 0 1 2 3 4 5
Byte value 75 User Defined Response protocol Reserved Reserved User Defined
Value Description
1 Provide response packets for all operations in a range - each command in the range has a separate
response.
3 Aggregates all responses - a command set based on a range will only supply one response, unless
some commands result in errors.
Byte # 0 1 2 3 4 5
Byte value 75 Status Response protocol Reserved Reserved Reserved
Byte # 0 1 2 3 4 5
Byte value 66 User Defined Min Port Max Port User Defined User Defined
Byte # 0 1 2 3 4 5
Byte value 66 Status Min Port Max Port User Defined User Defined
Status Value Description
1 Command completed successfully
64 Command fail
65 Incorrect parameters
66 Incorrect port parameter
67 Incorrect input parameter
70 Session not authenticated
80 Input is disabled
81 Port is locked
82 Port is disconnected
90 Command has timed out (no response from port)