After you go thru the whole process of creating the CTL file and using the 2 USB keys, getting the file to the phones... yes.
If you mean if you can just go right now and try to change it without the USB tokens and creating the CTL file, then no.
The whole process is outlined in the link Aaron posted, have you gone thru it?
HTH
java
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www.cisco.com/go/pdihelpdesk
HTH
java
if this helps, please rate
