Cisco 6800 Series Administration Guide

Figure 7: RJ45 Connector in the Phone Jack
Network Port on the Phone1
RJ45 Connector2
Step 4 Plug the RJ45 connector into the wall mount phone jack as shown in the following figure.
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 6800 Series Specifications

General

Audio	Wideband audio
Ethernet	10/100/1000 Mbps
Power over Ethernet (PoE)	IEEE 802.3af/at
USB	USB
SIP	Yes
Supported Protocols	SIP
Codec Support	G.711, G.722, G.729, iLBC