NTI UNIMUX SERIES USB KVM SWITCH
Command Protocol
RS232 commands supported by the unit are defined below. All command strings should be terminated with a <CR> (carriage return). When a command is sent, the entire string is echoed back along with a response from the addressed unit as shown in the command definitions. All characters in the command string should be upper case, and all numbers below 10 should have a leading 0 (ex: 1 = 01). As command strings are sent, the inner character delay cannot exceed 500 milliseconds.
CPU
|
| SWITCH AT UNIT ADDRESS 01 | |
(COMMAND SENT) | RS232 | (COMMAND RECEIVED) | |
CS 01,01,03<CR> |
| CS 01,01,03<CR> | |
|
| ||
|
| (ECHO) | |
|
| CS 01,01,03<CR> | |
(RESPONSE RECEIVED) | RS232 | (RESPOND) | |
CS 01,01,03<CR> | |||
| * <CR> |
* <CR>
Figure 13- RS232 Communication Illustrated
Note: To use this command protocol, the user is required to write a program that will send an entire command string all at once, not character by character. Programs that send one character at a time (such as HyperTerminal) cannot be used to control the UNIMUX. Alternatively, the user may use the NTI Switch Control Program or SerTest to control the UNIMUX via RS232 (see page 15).
Legend: |
| (All numbers must be two digits) |
SW | : | Switch |
OP | : | Output (User) Port (01) |
IP | : | Input (CPU) Port |
<CR> | : | Carriage Return (Hex 0xD) |
Note: For units with one output (user) port, use 01 for the output selection.
Command Definitions |
| |
Command String | Good Response | Description |
CS SW,IP,OP | *<CR> | Connect Output (User) Port To specific Input (CPU) Port |
RO SW,OP | *<CR>IP<CR> | Read Connection For Output (User) Port to Input (CPU) Port |
RS SW | *<CR> | Internal Reset |
RU SW | *<CR>IP,OP<CR> | Read Unit Size |
SS SW,00 | *<CR> | Disable Autostatus feature (see below) |
SS SW,01 | *<CR> | Enable Autostatus feature (see below) |
GO SW,OP | *<CR>go SW,OP:IP<CR> | Read connection of a Output (User) Port to Input (CPU) Port |
|
| (different response format than RO command) |
GM SW,00 | *<CR>go OP,IP (all ports)<CR> | Read connection matrix of all Output (User) ports |
If the first field is not a known command (as listed above) or SW field is different from the unit address programmed at the dip switch (page 12), the command will be ignored. If the SW field corresponds to the unit address, but if the syntax is wrong after this field, the switch will answer with a bad response ?<CR>.
Autostatus
When Autostatus is enabled, any output (user)
Example of an Autostatus message:
pc 01,01:04<CR>
which means "At the switch with unit address 01, the output (User) (01) has changed connection to input (CPU) port 04."
Note: An Autostatus message to the administrator will be delayed by any RS232 traffic being received by the switch from the administrator.
By default, Autostatus is disabled and must be manually enabled.
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