You can use the role based access in CUCM to provide different level of access. Read through this document:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/9_1_1/ccmsys/CUCM_BK_C5565591_00_cucm-system-guide-91/CUCM_BK_C5565591_00_cucm-system-guide-91_chapter_0100.html
-Terry
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