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If using 120 Ohm balanced interface, users can connect the DB37 male interface with
DB37 female-connector twisted-pair.
Optical interface
Plug the SC fiber tail into optical interface (push hard until to the deep end). If not sure
about transmission direction, it's advised first to turn on the power of device and then plug
in the fiber cable.
5.3.3. Applying the Power Supply
When PS is turned on, the PWR indicator shall be on.
After applying the power supply, first please ensure there is no alarm at the optical port.
If the optical port is connected properly, there shall not be LOS alarm. When just applying
the power supply, the E-6 (yellow) indicator shall be on. This is because of the few error bits
generated by the jitters. It shall be out after 10 – 20 seconds.
5.3.4. Mask/No Mask Button
If the connected E1 links are working in good condition without any signal loss, while there
is still another unused E1 link, the LOS alarm for unused E1 link may occur, which is called
"unused E1 alarm". Press MASK/NO MASK button "on" to clear all the unused E1 alarm
and all the E1 LOS alarm indicators will be off.
In the case unused E1 link alarm being masked, if the connected E1 sub-channel is
disconnected, the LOS indicator of this sub-channel will still be on.
If power supply is cut off and turned on again, then the mask function will be disabled.
Press button to "off" and then pressed to "on" again.
If after a period of operation, a new E1channel is needed, first disable the mask function
and then connect E1 link.
Chapter 4 Troubleshooting
If there are any problems during installation and using, try the following proposals. If the
problems still can not be solved, please contact distributors/agents for help.
The following explanations and solutions for alarms at optical ports and LOS alarms at E1
ports are used to handling local alarm problems. For remote-end alarms, please handle
them at remote site.
Green PWR indicator not on
Answer: PS faults or PWR indicator is not functioning. Check the power supply of
RC004-16.
LOS red indicator of optical port is on
Answer: Loss of receiving signal occurs at optical port. Check whether the input fiber (RX)
is connected well and ensure not reversed. Or check the receiving optical power with
optical power test-meter; it should be greater than receiving sensitivity specification.
E-6 yellow indicator of optical port is on
Answer: The bit error of optical RX signal is greater than 10
occurs for 10 seconds just after turning on the power, after 10 seconds the E-6 indicator will
be off. If E-6 alarm occurs during operation, check whether optical RX port connects well
and RX optical power.
-6.
10
Raisecom Technology Co., Ltd
It is normal that E-6 alarm
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