5.1.7 Troubleshooting the Serial Port
The front panel or rear panel serial port can be used for SecureSync configuration or to
obtain select data. The serial port is a standard DB9 female port. Communication with this
port is via a standard DB9F to DB9M serial cable (minimum pinout is pin 2 to 2, pin 3 to 3
and pin 5 to 5) connected to a PC running a terminal emulator program such as Tera Term
or Microsoft HyperTerminal. The port settings of the terminal emulator should be con-
figured as 115200, N, 8, 1 (flow control setting does not matter).
If the terminal emulator program does not display any data when the keyboard <Enter>
key is pressed, either SecureSync is not powered up or there is a problem with the con-
nection between SecureSync and the PC.
Using a multimeter, ring out the pins from one end of the serial cable to the other. Verify
the cable is pinned as a straight-thru serial cable (pin 2 to 2, pin 3 to 3 and pin 5 to 5) and
not as a null-modem or other pin-out configuration.
Disconnect the serial cable from SecureSync. Then, jumper (using a wire, paperclip or car
key, etc.) pins 2 and 3 of the serial cable together while pressing any character on the PC’s
keyboard. The character typed should be displayed on the monitor. If the typed character is
not displayed, there is a problem with either the serial cable or with the serial COM port of
the PC.
Refer to "Setting up a Terminal Emulator" on page513 for more information on using a
terminal emulator software to communicate with SecureSync via serial port.
5.1.8 Troubleshooting the Cooling Fan
The cooling fan (located on the front panel, to the right of the LED time display) is a tem-
perature controlled cooling fan. Temperature sensor(s) determine when the cooling fan
needs to turn on and off. It is normal operation for the cooling fan to not operate the entire
time SecureSync is running. It may be turned off for long periods at a time, depending on
the ambient and internal temperatures.
To verify the cooling fan is still operational, power cycle SecureSync unit .
Note: If the internal temperature in the unit is below 30 degrees Celsius,
the fan may not turn on as part of the power-up sequence. In this case, it is
recommended to let the unit “warm up” for approximately 30 minutes, in
order to allow the unit to get to the appropriate temperature.
See also: "Temperature Management" on page299
SecureSync 2400 User Manual 331
APPENDIX
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