Specifications

UDM Hub Control Protocol
115
UDM-0404 4x4 Multi-Format Distribution Hub
Get Remote Serial Buffer
Returns the contents of the remote serial buffer. On receiving this command, the remote serial buffer is flushed
and characters are acquired until the termination character is received. Once received a reply is sent as below.
As a general case, this command would normally be issued before sending a remote serial command to retrieve
information from the device connected to the receiver.
A typical example would be a lamp life query or similar. The command times out after 30 seconds of inactivity
on the remote serial port if the terminator is not received. The Serial buffer returned in the reply includes the
termination character.
Return Status:
Set Hub Identification
Stores a string identifier in the hub. This may be used to subsequently identify the hub or for storage of user-
defined values and information. The identification string can have a maximum length of 125 characters.
Length is the length of the ID string.
Return status:
Get Hub or Port Identification and System Information
Retrieves a string identifier from the hub, together with some predefined information. The string identifier is
the same as that set in the command above, the first 128 bytes are used for predefined system information
(defined below). Length is the length of the ID string if present.If port is specified (non zero), then only port
information is returned (no ID string).
Return status:
Predefined system information values:
Byte #0123 4 5
Byte value 89 User Defined Port Terminator User Defined User Defined
The communications channel between remote device and host is limited in speed -
approximately 10 characters per second, so care must be taken using this command
as large serial responses will take some considerable time to be retrieved.
Byte # 0 1 2 3 4..n
Byte value 89 Status Port No of characters in buffer Serial buffer
Byte # 0 1 2 3..127
Byte value 67 User Defined Length Identification String
Byte # 0 1 2 3 4 5
Byte value 67 Status 0 0 0 0
Byte #0123 4 5
Byte value 78 User Defined Port User Defined User Defined User Defined
Byte # 0 1 2 3 4..127 128..Length+128
Byte value 78 Status Port Length Predefined values Identification string
Byte offset (from 4) Hub information Port information
0 Chassis type Port version number - major
1 Number of ports Port version number - minor
2 Controller version number - major Port version - revision
3 Controller version number - minor
4 Controller version number - revision