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Appendix A. FAQ
If you encounter problems during installation and deployment, please try the following solutions. However, if
problems persist, please contact your local distributors or Raisecom for technical support.
1. The green PWR indicator is OFF?
Answer: the module is not inserted firmly or power supply failure.
2. The green SD indicator of fiber interface is OFF?
Answer: it is probably that transmit/receive fiber is reversely connected; or the peer is power off; or optical
wavelengths are not match.
3. The green ACT indicator is period flashing but no data is been transferred?
Answer: normal phenomena. It indicates that the module is transmitting/receiving management information.
4. Copper interface LNK/ACT indicator is OFF?
Answer: possible reasons and corresponding solutions:
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Bad UTP cable or wrong wire sequence. Try to replace with another UTP cable.
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The device that connected to the module copper interface is wrongly configured. Try to change the
device configuration properly.
5. MASTER has lost the remote peer?
Answer: it is possible that loopback test lasts for too long time. Stop loopback test.
6. After changing the agent, RC552-FE(A) management display becomes slow?
Answer: on conditions that RC552-FE(A) status doesn’t change, it reports its status to the agent every 120 seconds.
Thus, after changing the agent the status report looks slow, averagely 60 seconds.
7. The copper interface is configured by DIP-switch, but settings are changed after applying power supply?
Answer: such situation may take place if RC552-FE(A) was configured by NMS. Customers can use either
DIP-switch or NMS to configure RC552-FE(A). The configuration through NMS has higher priority and can be
memorized. Thus, after applying the power supply NMS will re-configure RC552-FE(A) automatically. It is
suggested that customers use NMS to configure RC552-FE(A).
8. The copper interface is configured to auto-negotiation, and the Router that connected to it is configured to 10M
half duplex mode. After connecting, the copper interface of RC552-FE(A) is negotiated to 10M full duplex?
Answer: on such condition that the copper interface of RC552-FE(A) is auto-negotiation and the connected device
is not, RC552-FE(A) speed will be negotiated to the same as connected device, while duplex mode will be decided
by configuration. In this situation, the copper interface of RC552-FE(A) shall be manually configured to 10M half
duplex or auto-negotiation (speed) half duplex.