Cisco 6851 Administration Guide

Figure 9: Mounting Holes
Mounting Hole on the Phone1
Wall Mount Pin on the Wall Mount Plate2
Step 8 Firmly slide the phone down into place as shown in the following image:
Figure 10: Sliding the IP Phone
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
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Phone Accessories
Install the Cisco IP Phone 6821 Multiplatform Phones on a Wall

Cisco 6851 Specifications

General

Network Protocols	SIP
Speakerphone	Yes
Bluetooth	No
Wi-Fi	No
USB Port	No
Display	3.5 inch grayscale display (396 x 162 pixels)
Ethernet	10/100 Ethernet
PoE	IEEE 802.3af
Audio	Wideband audio
Line Keys	4
Headset Port	RJ9
Supported Codecs	G.711, G.722, G.729, iLBC
Weight	0.9 kg