Black Box SW595A, Manual

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OL—Lock Serial/LAN Ports
command string: <cr>
//|OL xxxx
<cr>
xxxx = 4-digit password
response:
//|OL0
<cr> command failed (syntax error or ports already locked)
//|OL1
<cr> command succeeded, serial ports now locked
NOTE
0000 is not a valid password.
OS—Get Serial/LAN Port Lock Status
command string: <cr>
//|OS x
<cr>
response: //|OS0<cr> serial/LAN ports are unlocked
//|OS1<cr> serial/LAN ports are locked
OT—Set Temperature Limit
command string: <cr>
//|OT xx
<cr>
xx = 2-digit decimal number, 15 through 80 (°C)
example: <cr>
//|OT45
<cr> sets temperature limit to 45°C
OU—Unlock Serial/LAN Ports
command string: <cr>
//|OU xxxx
<cr>
xxxx = 4-digit password
response: //|OU0<cr> command failed (syntax error or invalid password)
//|OU1<cr> command succeeded, serial/LAN ports now unlocked
P—Set Port Assignment
command string: <cr>
//|P xxyy
<cr>
CHAPTER 7: Serial Port/LAN Port Commands