Cisco 7821 Administration Manual page 87

The following figure shows how you attach the phone to the wall bracket.
Figure 7: Attach Phone to Wall Bracket
Step 5 Press the phone firmly into the wall bracket and slide the phone down. The tabs in the bracket click into
position.
Step 6 Proceed to Adjust the Handset Rest, on page
Cisco IP Phone 7821, 7841, and 7861 Administration Guide for Cisco Unified Communications Manager 10.0 (SIP)
Non-Lockable Wall Mount Components
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