Linked Mode 应该是在你拔掉daisy chain之后就会disable，尝试做一下factory reset：
1- Hold the mute button down when unit boots " while inserting the Ethernet port" (Red
leds will single blink once a second
indicating that boot is in factory reset mode).
2- Release mute button. ( If no other action is taken factory reset mode will time out
in 20 seconds).
3- While in factory reset mode user presses and releases mute button once.
(Red leds start to double blink once a second indicating that user has selected the option
to erase the config).
4- If no other action is taken factory reset mode will time out in 20 seconds.
5- Hold down mute button for 2 seconds. (Red leds blink 10 times indicating that the
Beignet will erase the config and boot the unit).
6- After that the 8831 linked up with 2nd sound base.
