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If you have any problems during installation and usage, try to solve them by the following proposals. If
the problem persists, please contact distributors for technical support.
These following explanations and solutions of alarm for optical port and LOS alarm of V.35 tributary aim
at alarm of local end. Please handle it at remote end if alarm occurs at remote end.
Green PWR indicator is OFF
Answer: power supply faults. Please check whether power is properly supplied and –48V power
cord does not be connected reversely.
Local V.35 tributary alarm indicator (LV35AL) is on
Answer: It is possible that there is uplink alarm (AIS), loss of frame (LOF), or CRC alarm appearing
on the modem. It indicates that the signal received is abnormal. Please check the link quality and
interface parameter at the remote site.
Remote V.35 tributary alarm indicator (RV35AL) is on
Answer: This indicates there is V.35 receiving alarm at the remote site. The signal is sent by
RCMS2X01-30-FV35 equipment.
Optical Interface LLOS (RLOS) is ON
Answer: Receiving signal at optical interface is lost. Please check if the optical input (RX) is
connected, or reversely connected. Users can use the optical power meter to test the receiving
optical power to check if it is above the threshold of optical receiving sensitivity.
Optical Interface LLOF (RLOF) is ON
Answer: Optical receiving signal is loss of frame. Optical signals are receiving but the optical power
may be around the threshold. Please check the receiving optical power. If connects modem of
different brand name at optical interface, there also may be LLOF alarm.
Optical Interface LERR (RERR) is ON
Answer: When flashing, the bit error rate of optical signal is above 10
interface is connected properly, or the receiving optical power, and also ensure there is no sharp
turn of the optical fiber. When steady on, the bit error rate of optical signal is above 10
may be appearing just after applying the power supply, which is normal phenomenon, and it shall be
off in 10 seconds. If the indicator is steady on during operation, please check if the optical interface
is connected properly and the receiving optical power.
Severe packet loss of DTE equipment
Answer: The possible reasons for severe packet loss are:
1£ ®
Incorrect clock mode setup
2£ ®
Check V.35 interface status of the Router, if there are data errors on input and output, then it
indicates that TX CLKand RX CLK phase relationship need to be adjusted. This problem can be
located by performing local V.35 interface loop-back test.
6. Troubleshooting
15
Raisecom Technology Co., Ltd
-3
. Please check if the optical
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. This alarm
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