Hi,
take a look at the following document:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/crs/express_10_0/maintain_and_operate/guide/UCCX_BK_U6CBFEB9_00_unified-ccx-operations-guide/UCCX_BK_U6CBFEB9_00_unified-ccx-operations-guide_chapter_00.html
"Simple Network Management Protocol" section.
G.