ZyXEL Communications 2864 Series User Manual page 56

On the internal card model, short the TS2 jumper with a plug, then power up the
computer. The modem will be reset and will run a self-test. Printable characters will
be shown on the computer screen. The TS1 LED should be continuously ON. If the
LED flashes, the number of flashes indicates the error number corresponding to the
error message listed at the beginning of chapter 18.
This hardware reset procedure will reset the supervisor password back to the default
ZyXEL. But if you set S35.6=1 in profile 0, the supervisor password is protected
and not reset.
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