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CHAPTER 4: Operation
4.3.2 R
UNNING
S
ELF
-T
EST
Verify that Fiber Optic Modem is functioning properly by running the following
tests.
1. Press the ANA switch on the front panel to the On position (down).
2. Press the PATT pushbutton. Check that the:
• DCD lamp lights up,
• TEST lamp lights up,
• RD lamp turns off, and
• ERR lamp turns off.
3. If the test executes correctly, restore all the pushbuttons to their previous
settings. If the test does not execute properly, refer to
Chapter 5
.
Running BER Test
To check the link between the two DTEs:
• Press the PATT pushbutton on the Fiber Optic Modem’s front panel.
If any errors are encountered, the SQ LED will dim continuously (for
continuous errors) or blink (for intermittent errors). Refer to
Chapter 5
for more
help.
4.4 Operating Instructions
The Fiber Optic Modem operates unattended after installation. For more
information, see
Chapter 3
.
Operator intervention is required when either:
• The Fiber Optic Modem must be adapted for a new operating mode.
• Diagnostic loops are required.
4.4.1 C
HANGING
F
IELD
S
TRAPPING
If you need to reconfigure the Fiber Optic Modem for a different mode of
operation, follow the procedures described in
Chapter 3
, for changing
jumper/switch settings.
