Network Technologies RACKMUX-V17-8UNV - Manual (Page 21)

NTI RACKMUX KVM Drawer with NODEMUX Switch
17
NODEMUX
SWITCH
CPU
(terminal)
RS232
First Unit
RS232 RS232
Second Unit Last Unit
RS232
Serial Port Matrix-Y-1 Matrix-Y-1 Matrix-Y-1
NODEMUX
SWITCH
NODEMUX
SWITCH
Disable Loopback Disable Loopback Enable Loopback
Configuration
Baud Rate
In order for a terminal to communicate with the NODEMUX, the terminal and NODEMUX must each be configured for the same
baud rate.
Press <W> from the Administration Mode menu (page 8) to enter Switch Configuration mode. (Fig. 15)
Press <Tab> once to move the cursor bar to highlight "RS232 BAUD RATE". The default setting is 9600.
Press <Up Arrow> or <Down Arrow> to change the selected baud rate to 300,600,1200,2400,4800, or back to 9600.
Figure 15- Switch Configuration Mode screen
Note: When used in a RACKMUX, the NODEMUX can only be used as a stand alone switch. Do not change this setting.
In the event the setting is changed from "stand alone" to "slave", when the switch is power cycled the OSD menu will no
longer work. To restore the setting back to "stand alone", factory default settings must be restored via a terminal
connected to the RS232 control port. See the RS232 Command "CF" on page 19 to restore default settings.
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 Matrix-Y-1 cable (available from NTI) must be
used. (See Fig. 16). For each additional NODEMUX connected, another Matrix-Y-1 cable will be required.
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 16)
To enable or disable loopback, from the
Switch Configuration mode menu (above),
press <Tab> until the cursor bar
moves to highlight "LOOPBACK".
Press <Up Arrow> or <Down Arrow> to enable or
disable loopback as needed for the application.
Figure 16- Daisy chain configuration with Matrix-Y-1 cable
Do not change
this field.