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Appendix B Frequently Asked Questions
Ethernet link indicator (LNK) is off
Please check whether the network cable has broken down or whether the network devices (e.g. switch) are
operating properly.
Please check whether the devices are connected following connecting rules: if the self-adaptation and
self-cross connection function are turned off, the device should be connected to switch or HUB using direct
network connection and connected to router or network card using cross connection.
Please check whether the failover function has been enabled, for failover function will have local Ethernet
interface automatically shut down if E1 link fault or remote Ethernet interface fault occur.
E1 link indicator alarm
Please locate the cause of alarm using indicator definition in chapter 3.
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