Cisco 9971 - Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager

The following figure shows the wall mount kit installed on the phone.
Figure 15: Back View of ADA Non-Lockable Wall Mount Kit Installed on Phone
The following figure shows the phone with the wall mount kit from the side.
Figure 16: Side View of ADA Non-Lockable Wall Mount Kit Installed on Phone
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0
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Non-Lockable Wall Mount Components for Phone