Step 1 | From the Cisco Unified Communications Manager Administration, select . |
Step 2 | Locate your phone. |
Step 3 | In the Product Specific Configuration Layout, set the Web Admin parameter to Enable. |
Step 4 | In the Admin Password field, enter a password. |
Step 5 | Select Save and click OK. |
Step 6 | Select Apply Config and click OK. |
Step 7 | Restart the phone. |
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/8821/english/adminguide/w88x_b_wireless-8821-8821ex-admin-guide/w88x_b_wireless-8821-8821ex-admin-guide_chapter_011.html