Edimax Technology HP-2001AV - Manual (Page 7)

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device from the group of powerline. The device is then free to join another
HomePlug logical network.
4.2 Parameter Information Block (PIB)
The PIB, or Parameter Information Block, contains configuration values that
establish device network identity, general capabilities and operational modes.
On boot, the hardware Bootloader copies firmware to SDRAM and starts
firmware execution. The firmware then copies the PIB to SDRAM, reads it and
sets appropriate program variables accordingly. Some PIB settings of general
interest are the MAC Address, Device Access Key (DAK) and Network
Membership Key (NMK).
4.2.1 Reset to Factory Default PIB
Press the Reset pushbutton on the device for less than 3 seconds to reset it to
factory default PIB.
When you press the RESET button to reset the HP-2001AV , the NMK will
been released at same time . That is you can use the RESET button to leave
the powerline network group . Disconnect the device from the group of
powerline. The device is then free to join another HomePlug logical network.