Take a look at this thread it shows the built in options and third party
https://supportforums.cisco.com/docs/DOC-9758
http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/admin/configuration/guide/cmecover.html#wp1118926
In Cisco Unified CME 9.0 and later versions, support for call statistics is added for voice hunt groups. To write all the ephone and voice hunt group statistics to a file, the ephone-hunt statistics write-all command is enhanced and renamed to hunt-group statistics write-all command. If applicable, the TFTP statistics report consists of both ephone and voice hunt group statistics.
The show telephony-service all command is also enhanced to display the total number of ephone and voice hunt groups that have statistics collection turned on.
The statistics collect command under voice hunt-group configuration mode is introduced to enable the collection of call statistics for a voice hunt group.
The show voice hunt-group statistics command is introduced to display call statistics from voice hunt groups.
While this an old guide it too has the same information
http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/srnd/design/guide/managcme.html#wp1076106
Thanks
Srini
