Two notes for you on using the workbooks.
1. it is rather slow to do a complete download/upload, I have initialized the ICS with the number range, then downloaded it to the workbook (else the ICS will not recognize new numbers from the workbook if they are not default numbers) make changes to config in the workbook. and then upload just the areas where changes were made. this brings the time needed down tremendously.
2. DO NOT download the configuration from one ICS and then upload it to another ICS, this will change the Serial number of the second ICS to the first ICS (Very bad idea) (this happened to us in a training class with MICS4.1 software and NRU 8.0, Norstar might have fixed this since but don't try it anyway) JerryReeve
Communications Systems Int'l
com-sys.com