Hi
Page 49 onwards of this guide has the codes listed : http://www.cisco.com/en/US/docs/voice_ip_comm/cust_contact/contact_center/crs/express_8_0/user/guide/cda80ccxug-cm.pdf
In terms of reporting, it's possible to go to the 'detailed' tab of the Agent Not Ready Reason Code Summary report, and select 'Reason Code' as the filter. You can then multi-select reason codes you want to appear.
Regards
Aaron
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Aaron
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