11
Indicators of RS-232, RS-485 interface lines indicate receiving (RX) and transmitting (TX)
data over the relevant lines. LED’s blinking shows receiving / transmitting data over the relevant line,
with blink frequency depending on intensity of traffic.
2.2.7
Functionality Test
Performance of the modem shall be tested as per para
Ошибка
!
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.
of this manual.
2.2.8
Extreme Situation Actions
2.2.9
Troubleshooting
Table 2.2.9.1
Fault
Probable Cause
Solution
No fiber optic communications,
the PWR/FLK is lit steadily
Broken fiber or wrong fiber
link connection
Check the fiber optic cable, check
whether opposite ends of the cable are
connected to RX/TX correctly
3
Maintenance
3.1
General
The modem shall be maintained in line with the following schedule:
Table 3.1.1
Task Description
Frequency
Visual inspecting
Monthly
Performance monitoring
Three-monthly
3.2
Safety Precautions
The modem shall be maintained by personnel qualified for the Electrical Safety of Level II or
higher.
3.3
Maintenance Procedures
3.3.1 Visual inspecting the equipment implies verifying that it has no mechanical damage and is
fastened reliably while conditions of connecting wires and contact joints are good.
3.3.2 Verifying proper operability of the equipment is performed as per para 3.4 of this manual.
3.4
Performance Testing
Upon power being on, the PWR indicator on the modem shall turn on. The FIBER indicator
shall be off. If the FIBER LED is flashing, please check the optical connections and cable. When the
communication starts, the LEDs of corresponding lines shall flash.
Warning!
If sparks, fire, smoke, or smell of burning is found at the installation site of the
product, the product must be de-energized and sent for repair.
Warning!
Removing the PC board from the device housing automatically voids the
manufacturer’s warranty.
