Sitecom LN-554 User Manual page 10

If you want to make two new public devices (network name HomePlugAV) to become
private, please carry out Step 1 on both devices, then do step 2 on these two devices.
Finally, a private random network name is generated for these two devices.
Standby Mode
The standby mode enables the Homeplug to save power consumption. The Homeplug
automatically enters standby if no Ethernet cable is connected, or the connected device
enters standby, hibernation, or is powered-off for over two minutes. During standby, only
the POWER LED blinks at a slow rate. To exit standby, just insert the Ethernet cable to
the Homeplug, or wake up the connected device.
Note: Some computers support the Wake on LAN function that may cause the Homeplug
not to enter the standby mode.