Restoring A Hybrid Ip-Pbx To A Previous System Version (Kx-Tda50/ Kx-Tda100/Kx-Tda200 Only); Procedure - Panasonic KX-TDA5920 Installation/Upgrade Manual

4 Restoring a Hybrid IP-PBX to a Previous
System Version (KX-TDA50/KX-TDA100/
KX-TDA200 only)
The following procedure allows you to undo an upgrade and return to the previous version of system software
and data. Use this procedure if the upgrade process did not complete successfully.

4.1 Procedure

1.
Turn off the power to the PBX.
2.
Remove the new SD Memory Card that is currently installed in the PBX.
3.
Set the lock switch of the previous SD Memory Card for read-only access.
4.
Install the previous SD Memory Card in the SD Memory Card slot of the PBX.
5.
Slide the System Initialize Switch to the "SYSTEM INITIALIZE" position.
KX-TDA50
Document Version 2008-11
Reset Button
System Initialize Switch
SD Memory Card Installation/Upgrade Guide
4.1 Procedure
15