XiNCOM X16-R Some Status and Error conditions are indicated by the combinations of LEDs, as shown below:

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Ethernet Ports and Reset Button
Ethernet Ports WAN ports: 2 to 8 WAN ports (default is 2), using Port 1 to Port 8 for connecting
to Modem(s).
LAN ports: The remaining ports which are connected to PCs or a Hub.
Note:
Any port will automatically operate as an “Uplink” port if required. You can use a
normal LAN cable to connect to a normal port on another hub.
Reset Button When pressed and released, the MULTI-WAN GATEWAY will reboot (restart)
within 1 second. It will reset to default when pushed and held for more than 3
seconds.
Some Status and Error conditions are indicated by the combinations of
LEDs, as shown below:
LED Action Condition
Status – System & Packets flash alternatively. Firmware Download in progress.
Status – System & Packets flash concurrently. MAC address not assigned.
Status – System (Solid Off) & Packets (Solid On) SDRAM error
Status – System (Solid On) & Packets (Solid On) Timer/Interrupt error