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If there is any problem during the installation and operation, please try the
following solutions. If the problem cannot be solved yet, please contact distributors
for technical support.
PWR indicator is not on
Answer: Power supply fails. Check whether the power supply is working properly,
and make sure the power cable for –48V DC is not reversely connected.
Link indicator (LNK) is off
Answer: Please check if the link is disconnected.
Please check whether the bit rate matches. The bit rate of the Ethernet equipment
interface connected with the interface converter should be auto-negotiation or fixed
10Mbps.
LNK is on and ACT is flashing rapidly and continuously, but the
equipment cannot be pinged through.
Answer: In most cases, the reason is that the interface converter is connected with
100Mbps network equipment. RC907/908-EV35 can only connect with 10Mbps or
auto-negotiation interfaces. Please verify the bit rate of the connected network
equipment.
LNK is on and ACT is flashing intermittently at normal status, but the
equipment cannot be pinged through.
Answer: The reason may be that the phase relationship between the data and the
clock of DCE V.35 interface is not the same as the configuration of the interface
converter. Please reconfigure the 6th and 7th bits of the dip-switch.
Severe packet loss
Answer: The possible reasons for severe packet loss are as follows:
1. The duplex mode of the Ethernet interface of the interface converter is not
matching with that of the Ethernet equipment. Please refer to 2.3 Full
Duplex Mode Configuration, Chapter 2.
RC907/908-EV35 User Guide
Chapter 5. Troubleshooting
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