Hi There !
How does the billing works on CME ? I'll buy a 2851 CME...
Does the billing infomation (CDR) stays in the Flash ? How much time ? Is it possible to get a report of extension ?
I'd like to see some screenshoots of CME configuration, do you have any link that shows CME web interface ?
Here is where the CDR logs are for CME;
show call history voice - Displays the call history table for voice calls.
To specify call detail record (CDR) storage time, use the dial-control-mib command, which has two sets of keyword and argument options. The max-size number option specifies the maximum size of the CDR event table. The valid range is from 0-500, and the default is 50. Setting the value to 0 disables the CDR feature.
The retain-timer number option specifies the length of time in minutes that entries will remain in the call history table. The valid range is from 0-2147483647 minutes, and the default is 15. Setting the value to 0 prevents any call history from being retained.
Call Activity Monitoring and Call History Logging
The Cisco Unified CME GUI provides call history table information so that a network administrator can monitor the call history information for unknown callers and use this information to disallow calling activities based on select calling patterns. The call history log should be configured to perform forensics and accounting and allow the administrator to track down fraudulent calling patterns. Configure the following commands to log call activity and call history:
dial-control-mib retain-timer 10080
dial-control-mib max-size 500
From this doc;
Logging CDR to External Servers
The parsing of this info is the tough part :( You might want to look into Cisco Partner "Stonevoice" that has a nice application for doing up these reports/graphs etc;
Sorry, don't have any screenshots :(
Cisco Unified Communications Manager Express System Administrator Guide
Cisco Unified CallManager Express Solution Reference Network Design Guide
Hope this helps!