NTI NODEMUX SERIES UNIVERSAL KVM SWITCH
Loop Back
In order for an RS232 command and a response to the command to be viewed at the terminal screen, the NODEMUX must have its Loop Back feature enabled.
More than one NODEMUX may be connected to a terminal at a time. To do so, a
If the NODEMUX is one of two or more switches being controlled via RS232, and if the NODEMUX is not that last switch in the series of switches controlled, then this setting should be changed to "DISABLED".
If the NODEMUX is the only device controlled via RS232 , or if it is the last device in a series of devices being controlled, then this setting should remain "Enabled". (See Figure 32)
To enable or disable loop back, from the Switch Configuration mode menu (above),
press <Tab> until the cursor bar moves to highlight "LOOPBACK".
CPU | RS232 | |||
Serial Port |
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(terminal) |
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| RS232 |
| RS232 | RS232 |
Press < > (up arrow) or < > (down arrow) to enable or disable loop back as needed for the application.
NODEMUX | NODEMUX | NODEMUX |
SWITCH | SWITCH | SWITCH |
First Unit | Second Unit | Last Unit |
Disable Loopback | Disable Loopback | Enable Loopback |
Figure 32- Daisy chain configuration with Matrix-Y-1 cable
Unit Address
In order for a terminal to communicate with one or more NODEMUX switches, each switch must have a unique address. The NODEMUX will only respond to commands from a terminal if its address is embedded in the command. Up to 15 NODEMUX switches can be connected in a "daisy chain" to a terminal, each with its own unique address.
To set the address of the NODEMUX, from the Switch Configuration mode menu (Fig. 31 on page 28), press <Tab> until the cursor bar moves to highlight "RS232 UNIT ADDRESS".
press < > (up arrow) or < > (down arrow) until the desired address
Exit Switch Configuration Mode
Once changes are made to the Switch Configuration menu, press <Enter> and <Y> to save them.
To exit without saving, press <Esc>, then <N>, then <Esc> again. The menu will return to the Administration Mode without saving the changes made. .
Changes made will take effect the next time the NODEMUX is power cycled.
Note: In order to connect multiple NODEMUX units together a
RS232 | |||
CPU SerialPort |
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RS232 |
| RS232 |
NTI |
| NTI |
SWITCH |
| SWITCH |
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FirstUnit |
| SecondUnit |
Figure 33- RS232 connection with Matrix-Y-1 cable
RS232
NTI
SWITCH
LastUnit
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