Cisco 7821 Administration Guide

CONTENTS
New and Changed Information 1
CHAPTER 1
New and Changed Information for Firmware Release 11.2(3)SR1 1
New and Changed for Firmware Release 11.2(3) 1
New and Changed for Firmware Release 11.2(1) 3
New and Changed for Firmware Release 11.1(2) 4
New and Changed for Firmware Release 11.1(1) 5
New and Changed Features for Firmware Release 11.0(1) 5
New and Changed Features for Firmware Release 11(0) 6
New Information for Firmware Release 10.4(1) SR1 8
New Information for Firmware Release 10.4(1) 8
About the Cisco IP Phone 9
PART I
Technical Details 11
CHAPTER 2
Overview of the Cisco IP Phone 11
Physical and Operating Environment Specifications 11
Cable Specifications 12
Network and Computer Port Pinouts 13
Network Port Connector 13
Computer Port Connector 14
Phone Power Requirements 14
Power Outage 15
Power Reduction 16
Power Negotiation Over LLDP 16
Network Protocols 16
VLAN Interaction 19
Cisco IP Phone 7800 Series Multiplatform Phones Administration Guide
iii

Cisco 7821 Specifications

General

Brand	Cisco
Model	7821
Category	IP Phone
Language	English