Important!

If the circuit pack to be backed out is the active circuit pack for transmission and the circuit pack is removed, the system performs an automatic protection switch and subsequent transmission hits (less than 60 ms) will occur. If desired, perform this step to determine the transmission state of the circuit pack to be backed out.

From the System View select Reports → Status Lists → Pack. Click on Shelf and Select. Observe the value of the Switch State parameter for the DS1 circuit pack to be replaced. If the Switch State parameter is active, the circuit pack is the active circuit pack for transmission. Click Close.

Important!

If the DS1 circuit pack to be backed out is the active circuit pack for transmission, an optional manual switch can be performed before backing out the circuit pack.

If the DS1 circuit pack to be backed out is not the active circuit pack for transmission, proceed to Step 3.

To perform an optional manual transmission switch, select Fault → Protection Switch. Click on the required 1+1 Equip fn-a protection group and Select. Select the Normal Switch Type and click Apply.

Result:

A dialog box appears asking you to confirm executing this command. Click Yes. Then click Close.

If required, repeat Step 1 to verify that the DS1 circuit pack to be backed out is not the active circuit pack for transmission.

STOP! To complete backing out the UPSR upgrade, return to the procedure that directed you to perform this procedure.

End of steps