User guide

PTP 800 Series User Guide Using recovery mode
phn-2513_004v000 (Oct 2012)
7-77
To erase the critical security parameters of the CMU, proceed as follows:
1
Select Zeroize Critical Security Parameters. The Zeroize Security
Parameters dialog is displayed (Figure 206).
2
Select OK. The Recovery Options page is redisplayed with a message indicating
that the security parameters have been zeroized.
3
Select Reboot. The Reboot Confirmation dialog is displayed.
4
Select OK. The reboot progress message is displayed. On completion, the CMU
restarts.
Figure 206 Zeroize Security Parameters dialog
Downgrading PTP 800 software
To downgrade to an older version of PTP 800 software:
• Carefully record the existing configuration of the link
• Delete all configuration data as described in Erasing configuration on page 7-76
• Load the older software image as described in Upgrading software image on page 7-74.
• Re-install using the Installation Wizard and Configuration pages.
Units with Recovery Image Software Recovery-04-00 cannot be downgraded to
application software earlier than 800-04-00. See Checking the recovery version on page
7-70.