Cisco IP Phone 6851, IP Phone 6841 Administration Manual

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

First Published: 2017-11-22

Last Modified: 2017-12-20

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•

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CONTENTS

PART I

CHAPTER 1

CHAPTER 2

About the Cisco IP Phone 1

Cisco IP Phone Hardware 3

Overview of the Cisco IP Phone 6800 Series Multiplatform Phones 3

New and Changed Features 4

New and Changed for Firmware Release 11.1(1) 4

Cisco IP Phone 6841 Multiplatform Phones Connections 5

Cisco IP Phone 6851 Multiplatform Phones Connections 6

Buttons and Hardware 8

Softkey, Line, and Feature Buttons 9

Terminology Differences 10

Technical Details 11

Physical and Operating Environment Specifications 11

Cable Specifications 12

Network and Computer Port Pinouts 12

PART II

CHAPTER 3

Network Port Connector 12

Computer Port Connector 13

Phone Power Requirements 14

Network Protocols 15

VLAN Interaction 18

External Devices 19

Phone Installation 21

Cisco IP Phone Installation 23

Verify the Network Setup 23

Install the Cisco IP Phone 24

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

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Contents

Configure the Network from the Phone 25

Network Configuration Fields 27

Text and Menu Entry From the Phone 30

Verify Phone Startup 31

Configure the Voice Codecs 31

Set the Optional Network Servers 32

VLAN Settings 32

Cisco Discovery Protocol 32

LLDP-MED 33

Chassis ID TLV 34

Port ID TLV 34

Time to Live TLV 34

End of LLDPDU TLV 35

Port Description TLV 35

System Name TLV 35

System Capabilities TLV 35

Management Address TLV 35

System Description TLV 35

IEEE 802.3 MAC/PHY Configuration/Status TLV 36

LLDP-MED Capabilities TLV 36

Network Policy TLV 37

LLDP-MED Extended Power-Via-MDI TLV 37

LLDP-MED Inventory Management TLV 37

Final Network Policy Resolution and QoS 38

Special VLANs 38

Default QoS for SIP Mode 38

QoS Resolution for CDP 38

QoS Resolution for LLDP-MED 38

Coexistence with CDP 38

LLDP-MED and Multiple Network Devices 39

Configure VLAN Settings 39

SIP and NAT Configuration 39

SIP and the Cisco IP Phone 39

SIP Over TCP 40

SIP Proxy Redundancy 40

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

iv

Contents

Dual Registration 40

Dual Registration and DNS SRV Limitations 40

Dual Registration and Alternate Proxy 41

Failover and Recovery Registration 41

Fallback Behavior 41

RFC3311 41

SIP NOTIFY XML-Service 41

SIP Configuration 42

Configure the Basic SIP Parameters 42

Configure the SIP Timer Values 42

Configure the Response Status Code Handling 42

Configure the RTP Parameters 43

Configure the SDP Payload Types 43

Configure the SIP Settings for Extensions 44

Configure the SIP Proxy Server 44

Configure the Subscriber Information Parameters 44

Managing NAT Transversal with Phones 44

Enable NAT Mapping 45

NAT Mapping with Session Border Controller 45

NAT Mapping with SIP-ALG Router 45

NAT Mapping with the Static IP Address 45

Configure NAT mapping with STUN 46

Determining Symmetric or Asymmetric NAT 47

Dial Plan 48

Dial Plan Overview 48

Digit Sequences 48

Digit Sequence Examples 49

Acceptance and Transmission of the Dialed Digits 51

Dial Plan Timer (Off-Hook Timer) 52

Syntax for the Dial Plan Timer 52

Examples for the Dial Plan Timer 52

Interdigit Long Timer (Incomplete Entry Timer) 52

Syntax for the Interdigit Long Timer 52

Example for the Interdigit Long Timer 53

Interdigit Short Timer (Complete Entry Timer) 53

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

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Contents

Syntax for the Interdigit Short Timer 53

Examples for the Interdigit Short Timer 53

Edit the Dial Plan on the IP Phone 54

Reset the Control Timers 54

Regional Parameters and Supplementary Services 54

Regional Parameters 54

Set the Control Timer Values 55

Localize Your Cisco IP Phone 55

Time and Date Settings 55

Configure Daylight Saving Time 56

Daylight Saving Time Examples 56

Select a Display Language on the Phone 57

Dictionary Server Script 58

CHAPTER 4

Localization Configuration Example 59

Cisco IP Phone 6800 Series Documentation 59

Third Party Call Control Setup 61

Determine the Phone MAC Address 61

Network Configuration 61

Provisioning 62

Web-Based Configuration Utility 62

Access the Web-Based Configuration Utility 62

Determine the IP Address of the Phone 62

Allow Web Access to the Cisco IP Phone 63

Web Administration Tabs 63

Administrator and User Accounts 63

Enable User Access to the Phone Interface Menus 64

Access Administrative Options by Login 64

Access Administrative Options by IP Address 64

PART III

CHAPTER 5

vi

Phone Accessories 65

Cisco IP Phone Accessories 67

Supported Accessories 67

Connect the Footstand 68

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

Contents

Headsets 68

Audio Quality 68

Analog Headsets 69

CHAPTER 6

PART IV

CHAPTER 7

Wall Mount Kit 71

Wall Mount Kit Components 71

Install a Phone with the Wall Mount Kit 72

Adjust the Handset Rest 75

Phone Administration 77

Cisco IP Phone Security 79

Security Features 79

Domain and Internet Setting 79

Configure Restricted Access Domains 79

Configure the Internet Connection Type 79

DHCP Option Support 80

Configure the Challenge for the SIP INVITE Messages 81

Transport Layer Security 82

Configure SIP Over TLS Signaling Encryption 82

CHAPTER 8

Documentation, Support, and Security Guidelines 82

Cisco Product Security Overview 82

Cisco IP Phone Customization 85

Phone Information and Display Settings 85

Configure the Phone Name 85

Change Wallpaper from the Phone Page 86

Add Logo as Boot Display 86

Adjust Backlight Timer from Configuration Utility 86

Configure the Number of Call Appearances Per Line 87

Call Features Configuration 87

Enable Call Transfer 87

Call Forward 88

Enable Call Forwarding on Voice Tab 88

Enable Call Forwarding on User Tab 88

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

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Contents

Enable Conferencing 88

Configure Missed Call Indication with the Configuration Utility 89

Enable Do Not Disturb 89

Configure Synchronization of DND and Call Forward 89

Configure Star Codes for DND 90

Shared Lines 90

Configure a Shared Line 91

Configure Voice Mail 91

Configure Voice Mail for each Extension 92

Configure the Message Waiting Indicator 92

Assign a Ring Tone to an Extension 93

Configure the Audio Settings 93

User Access Control 93

CHAPTER 9

Phone Web Server 94

Configure the Web Server from the Phone Screen Interface 94

Direct Action URL 94

Enable Access to Phone Web Interface 96

XML Services 96

XML Directory Service 97

XML Applications 97

Macro Variables 97

Configure a Phone to Connect to an XML Application 100

Configure a Phone to Connect to an XML Directory Service 100

Phone Features and Setup 101

Phone Features and Setup Overview 102

Cisco IP Phone User Support 102

Telephony Features for Cisco IP Phone 102

Feature Buttons and Softkeys 107

viii

Configure a Speed Dial on a Line Key 108

Configure a Speed Dial with the Configuration Utility Page 109

Enable Conference Button with a Star Code 110

Set up Extra Line Keys 110

Busy Lamp Field Configuration on a Monitoring Phone 110

Configure the Busy Lamp Field for Multiple Users with the Configuration Utility 111

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

Contents

Configure the Busy Lamp Field in the Phone Configuration File 111

Configure the Busy Lamp Field for a Single Phone with the Configuration Utility 112

Configure Busy Lamp Field with Other Features 112

Configure Alphanumeric Dialing 114

Configure a Paging Group (Multicast Paging) 114

Call Park 115

Configure Call Park with Star Codes 116

Add Call Park to a Programmable Line Key 116

Configuring Programmable Softkeys 117

Customize a Programmable Softkey 117

Configure Speed Dial on a Programmable Softkey 117

Programmable Softkeys 118

Configure Provisioning Authority 119

Configure Provisioning Authority in the Phone Configuration File 119

Enable Hoteling on a Phone 120

Set the User Password 120

Download Problem Reporting Tool Logs 121

Configure PRT Upload 121

Configure a Phone to Accept Pages Automatically 123

Server-Configured Paging 123

Manage Phones with TR-069 123

View TR-069 Status 123

Enable Electronic Hookswitch 124

Enable Remote Call Recording with SIP REC 124

Enable Remote Call Recording with SIP INFO 126

Set Up a Phone for Presence 127

Set Up a Call Center Agent Phone 127

CHAPTER 10

Corporate and Personal Directory Setup 129

Personal Directory Setup 129

LDAP Configuration 129

Prepare the LDAP Corporate Directory Search 130

Configure BroadSoft Settings 130

Configure the XML Directory Service 131

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

ix

Contents

PART V

CHAPTER 11

Phone Troubleshooting 133

Monitoring Phone Systems 135

Monitoring Phone Systems Overview 135

Cisco IP Phone Status 135

Display the Phone Information Window 136

View the Phone Status 136

View the Status Messages on the Phone 136

View the Network Status 137

Display Call Statistics Window 137

Call Statistics Fields 138

View the Customization State in the Configuration Utility 139

Cisco IP Phone Web Page 140

Info 140

Status 140

System Information 140

IPv4 Information 140

IPv6 Information 141

Reboot History 141

Product Information 142

Downloaded Locale Package 142

Phone Status 142

Dot1x Authentication 143

Ext Status 143

Line Call Status 144

Paging Status 145

TR-069 Status 146

Debug Info 146

Console Logs 146

Problem Reports 146

Factory Reset 147

Download Status 147

Firmware Upgrade Status 147

Provisioning Status 147

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

x

Contents

Custom CA Status 148

Network Statistics 148

Ethernet Information 148

Network Port Information 149

Access Port Information 150

Voice 152

System 152

System Configuration 152

Network Settings 153

IPv4 Settings 154

IPv6 Settings 154

802.1X Authentication 155

Optional Network Configuration 155

VLAN Settings 156

Inventory Settings 157

SIP 157

SIP Parameters 157

SIP Timer Values (sec) 160

Response Status Code Handling 163

RTP Parameters 163

SDP Payload Types 164

NAT Support Parameters 165

Provisioning 167

Configuration Profile 167

Firmware Upgrade 169

CA Settings 170

HTTP Settings 171

Problem Report Tool 171

General Purpose Parameters 172

Regional 172

Call Progress Tones 172

Distinctive Ring Patterns 173

Control Timer Values (sec) 174

Vertical Service Activation Codes 174

Vertical Service Announcement Codes 178

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

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Contents

Outbound Call Codec Selection Codes 179

Time 180

Language 182

Phone 182

General 182

Line Key 182

Miscellaneous Line Key Settings 183

Supplementary Services 183

Ringtone 185

Extension Mobility 185

XSI Service 185

Broadsoft XMPP 187

XML Service 187

LDAP 188

Programmable Softkeys 190

User 191

Hold Reminder 191

Call Forward 191

Speed Dial 192

Supplementary Services 192

Audio Volume 193

LCD 194

Extension 194

Extension 194

General 194

Share Line Appearance 194

NAT Settings 195

Network Settings 195

SIP Settings 195

Call Feature Settings 197

xii

ACD Settings 199

Proxy and Registration 199

Subscriber Information 202

Audio Configuration 202

Dial Plan 204

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

Contents

TR-069 205

TR-069 205

Call History 207

Personal Directory 207

CHAPTER 12

Troubleshooting 209

General Troubleshooting Information 209

Startup Problems 211

Cisco IP Phone Does Not Go Through the Normal Startup Process 211

Phone Displays Error Messages 212

Phone Cannot Connect Using DNS 212

Configuration File Corruption 212

Cisco IP Phone Cannot Obtain IP Address 212

Phone Reset Problems 213

Phone Resets Due to Intermittent Network Outages 213

Phone Resets Due to DHCP Setting Errors 213

Phone Resets Due to Incorrect Static IP Address 213

Phone Resets During Heavy Network Usage 214

Phone Does Not Power Up 214

Phone Cannot Connect to LAN 214

Audio Problems 214

No Speech Path 214

Choppy Speech 215

General Telephone Call Problems 215

Phone Call Cannot Be Established 215

Phone Does Not Recognize DTMF Digits or Digits Are Delayed 215

Feature Troubleshooting 216

ACD Call Information Missing 216

Phone Doesn't Show ACD Softkeys 216

Call Doesn't Record 216

Presence Status Doesn't Work 217

Phone Presence Message: Disconnected from Server 217

Phone Display Problems 217

The Font is Too Small or Has Unusual Characters 218

Phone Screen Displays Boxes Instead of Asian Characters 218

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

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Contents

Softkey Labels are Truncated 218

Phone Locale is Not Displayed 219

Report All Phone Issues from the Phone Web Page 219

Troubleshooting Procedures 219

Check DHCP Settings 220

Verify DNS Settings 220

Additional Troubleshooting Information 220

CHAPTER 13

Maintenance 221

Basic Reset 221

Factory Reset the Phone with the Web UI Button 222

Voice Quality Monitoring 222

Voice Quality Troubleshooting Tips 222

Voice Quality Reporting 223

Supported Scenarios for Voice Quality Reporting 223

Mean Opinion Scores and Codecs 224

Configure Voice Quality Reporting 224

Cisco IP Phone Cleaning 225

View Phone Information 225

Reboot Reasons 225

Reboot History on the Phone Web User Interface 226

Reboot History on the Cisco IP Phone Screen 226

Reboot History in the Status Dump File 226

Phone Behavior During Times of Network Congestion 226

xiv

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

PART I

About the Cisco IP Phone

Cisco IP Phone Hardware, page 3

•

Technical Details, page 11

•

CHAPTER 1

Cisco IP Phone Hardware

Overview of the Cisco IP Phone 6800 Series Multiplatform Phones, page 3

•

New and Changed Features, page 4

•

Cisco IP Phone 6841 Multiplatform Phones Connections, page 5

•

Cisco IP Phone 6851 Multiplatform Phones Connections, page 6

•

Buttons and Hardware, page 8

•

Terminology Differences, page 10

•

Overview of the Cisco IP Phone 6800 Series Multiplatform Phones

The Cisco IP Phone 6800 Series Multiplatform Phones comprises a set of full-featured VoIP
(Voice-over-Internet Protocol) phones that provide voice communication over an IP network. The phones
provide all the features of traditional business phones, such as call forwarding, redialing, speed dialing,

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

3

New and Changed Features

transferring calls, and conference calling. The Cisco IP Phone 6800 Series Multiplatform Phones is targeted
for solutions that are centered on Third-Party SIP-based IP PBX.

Figure 1: Cisco IP Phone 6800 Series Multiplatform Phone

Note

In this document, the terms Cisco IP Phone, phone, or device mean Cisco IP Phone 6800 Series
Multiplatform Phones.

New and Changed Features

New and Changed for Firmware Release 11.1(1)

Asian Language Support

New or Changed SectionsFeature

Dictionary Server Script, on page 58

Phone Display Problems, on page 217

The Font is Too Small or Has Unusual Characters,
on page 218

Phone Screen Displays Boxes Instead of Asian
Characters, on page 218

Phone Locale is Not Displayed, on page 219

Softkey Labels are Truncated, on page 218

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

4

Cisco IP Phone 6841 Multiplatform Phones Connections

New or Changed SectionsFeature

Call Center Support

Call Recording

Factory Reset Button in the Phone Web Page

IPv6 Support

Set Up a Call Center Agent Phone , on page 127

ACD Call Information Missing, on page 216

ACD Settings, on page 199

Phone Doesn't Show ACD Softkeys, on page 216

Enable Remote Call Recording with SIP REC, on
page 124

Enable Remote Call Recording with SIP INFO, on
page 126
Call Doesn't Record, on page 216

Factory Reset the Phone with the Web UI Button,
on page 222

Factory Reset, on page 147

Network Configuration Fields, on page 27Gigabit Support

Network Configuration Fields, on page 27

IPv6 Information, on page 141

Network Settings, on page 153

IPv6 Settings, on page 154

Presence

Set Up a Phone for Presence, on page 127

Presence Status Doesn't Work, on page 217

Phone Presence Message: Disconnected from Server,
on page 217

Broadsoft XMPP, on page 187

General, on page 182Wideband Handset Support

Cisco IP Phone 6841 Multiplatform Phones Connections

Connect your phone to your LAN with an Ethernet cable to enable full functionality of your phone. You need
to use a power adapter to power the phone. Do not extend the LAN Ethernet cable outside the building. For
your phone to work, it must be connected to the IP telephony network.

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

5

Cisco IP Phone 6851 Multiplatform Phones Connections

4DC adaptor port1

3

connection

Access port (10/100/1000 PC)
connection (optional)

Handset connection5Power adapter2

Analog headset connection (optional)6Network port (10/100/1000 SW)

Cisco IP Phone 6851 Multiplatform Phones Connections

Connect your phone to your LAN with an Ethernet cable to enable full functionality of your phone. If your
Ethernet port is equipped with Power over Ethernet (PoE), you can power the phone through the LAN port.
If you don't have PoE available, then you need to use a power adapter to power the phone. Do not extend the
LAN Ethernet cable outside the building. For your phone to work, it must be connected to the IP telephony
network.

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

6

Cisco IP Phone 6851 Multiplatform Phones Connections

5For future use1

Access port (10/100/1000 PC)
connection (optional)

Auxiliary port (optional)6DC adaptor port (optional)2

Handset connection7Power adapter (optional)3

4

Analog headset connection (optional)8Network port (10/100/1000 SW)
connection; IEEE 802.3af power
enabled

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

7

Buttons and Hardware

Buttons and Hardware

The following figure shows the Cisco IP Phone 6841.

Figure 2: Cisco IP Phone 6800 Series Buttons and Features

Handset and Handset light strip1

2

5

Programmable feature buttons and line
buttons

Softkey buttons3

Navigation cluster4

Hold/Resume, Conference, and
Transfer

Indicates whether you have an incoming call (flashing red)
or a new voice message (steady red).

Access your phone lines, features, and call sessions.

For more information, see Softkey, Line, and Feature

Buttons, on page 9.

Access functions and services.

For more information, see Softkey, Line, and Feature

Buttons, on page 9.

Navigation ring and Select button. Scroll through
menus, highlight items, and select the highlighted item.

Hold/Resume Place an active call on hold and resume
the held call.

Conference Create a conference call.

Transfer Transfer a call.

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

8

Buttons and Hardware

Speakerphone, Mute, and Headset6

Speakerphone Toggle the speakerphone on or off.

When the speakerphone is on, the button is lit.

Mute Toggle the microphone on or off. When the
microphone is muted, the button is lit.

Headset Toggle the headset on or off. When the
headset is on, the button is lit.

7

Contacts, Applications, and

Contacts Access personal and corporate directories.

Messages

Applications Access call history, user preferences,

phone settings, and phone model information.

Messages Autodial your voice messaging system.

Volume button8

Adjust the handset, headset, and speakerphone volume
(off hook) and the ringer volume (on hook).

Softkey, Line, and Feature Buttons

You can interact with the features on your phone in several ways:

Softkeys, located below the screen, give you access to the function displayed on the screen above the

•

softkey. The softkeys change depending on what you are doing at the time. The More ... softkey shows
you that more functions are available.

Feature and line buttons, located on either side of the screen, give you access to phone features and

•

phone lines.

◦ Feature buttons—Used for features such as Speed dial or Call pickup, and to view your status on

another line.

◦ Line buttons—Used to initiate or answer a call or resume a held call. You can also use a line key

to open and close the call session window, and to navigate through the call session window. Open
the call session window to see the calls on the line.

Feature and line buttons illuminate to indicate status:

•
Green—Line is idle.

•
Red, steady—Line is active or in use.

•
Red, flashing—Line is on hold or there is an inbound call.

•
Amber, steady—Line is unregistered (cannot be used).

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

9

Terminology Differences

Your administrator can set up some functions as softkeys or as feature buttons. You can also access some
functions with softkeys or the associated hard button.

Terminology Differences

The following table highlights some of the terminology differences in the Cisco IP Phone 6800 Series
Multiplatform Phones User Guide and the Cisco IP Phone 6800 Series Multiplatform Phones Administration
Guide

Table 1: Terminology Differences

Administration GuideUser Guide

Message Indicators

Message Waiting Indicator (MWI) or Message
Waiting Lamp

Voice Messaging SystemVoicemail System

Configuration UtilityPhone Web Page

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

10

CHAPTER 2

Technical Details

Physical and Operating Environment Specifications, page 11

•

Cable Specifications, page 12

•

Network and Computer Port Pinouts, page 12

•

Phone Power Requirements, page 14

•

Network Protocols, page 15

•

VLAN Interaction, page 18

•

External Devices, page 19

•

Physical and Operating Environment Specifications

The following table shows the physical and operating environment specifications for the Cisco IP Phone 6800
Series Multiplatform Phones.

Table 2: Physical and Operating Specifications

Value or RangeSpecification

32° to 104°F (0° to 40°C)Operating temperature

10% to 90% (noncondensing)Operating relative

humidity

Storage temperature

14° to 140°F (–10° to 60°C)

10% to 95% (noncondensing)Storage relative hunidity

8.14 in. (207 mm), excluding the footstandHeight

8.11 in. (206 mm)Width

1.1 in. (28 mm) , excluding the footstandDepth

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

11

Cable Specifications

Value or RangeSpecification

1.356 lb. (615 g), excluding footstand and handsetWeight

Power

Cables

Distance Requirements

For detailed technical information about the phone, see the datasheet at:

https://www.cisco.com/c/en/us/products/collaboration-endpoints/ip-phone-6800-series-multiplatform-firmware/
datasheet-listing.html

Cable Specifications

• 100-240 VAC, 50-60 Hz, 0.5 A—When using the AC adapter

• 48 VDC, 0.2 A—When using the in-line power over the network cable

Category 3/5/5e/6 for 10-Mbps cables with 4 pairs

•

Category 5/5e/6 for 100-Mbps cables with 4 pairs

•

Category 5/5e/6 for 1000-Mbps cables with 4 pairs

•

As supported by the Ethernet Specification, it is assumed that the maximum
cable length between each Cisco IP Phone and the switch is 100 meters (330
feet).

RJ-9 jack (4-conductor) for handset and headset connection.

•

RJ-45 jack for the LAN 10/100/1000BaseT connection.

•

RJ-45 jack for a second 10/100/1000BaseT connection.

•

5-volt power connector.

•

Network and Computer Port Pinouts

Although both the network and computer (access) ports are used for network connectivity, they serve different
purposes and have different port pinouts:

The network port is the 10/100/1000 SW port.

•

The computer (access) port is the 10/100/1000 PC port.

•

Network Port Connector

The following table describes the network port connector pinouts.

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

12

Table 3: Network Port Connector Pinouts

FunctionPin Number

BI_DA+1

BI_DA-2

BI_DB+3

BI_DC+4

BI_DC-5

BI_DB-6

BI_DD+7

BI_DD-8

Network and Computer Port Pinouts

Note

BI stands for bidirectional, while DA, DB, DC, and DD stand for Data A, Data B, Data C, and Data
D respectively.

Computer Port Connector

The following table describes the computer port connector pinouts.

Table 4: Computer (Access) Port Connector Pinouts

FunctionPin Number

BI_DB+1

BI_DB-2

BI_DA+3

BI_DD+4

BI_DD-5

BI_DA-6

Note

BI_DC+7

BI_DC-8

BI stands for bidirectional, while DA, DB, DC, and DD stand for Data A, Data B, Data C, and Data
D respectively.

Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide

13

Phone Power Requirements

Phone Power Requirements

The Cisco IP Phone 6841 is powered by external power. The Cisco IP Phone 6851 can be powered with
external power or with Power over Ethernet (PoE). A separate power supply provides external power. The
switch can provide PoE through the phone Ethernet cable.

Note

When you install a phone that is powered with external power, connect the power supply to the phone
and to a power outlet before you connect the Ethernet cable to the phone. When you remove a phone that
is powered with external power, disconnect the Ethernet cable from the phone before you disconnect the
power supply.

Table 5: Guidelines for Cisco IP Phone Power

GuidelinesPower Type

The Cisco IP Phone 6841 and 6851 use a custom power supply.External power: Provided
through the external power
supply

External power—Provided
through the Cisco IP Phone
Power Injector

The Cisco IP Phone Power Injector may be used with the Cisco IP Phone 6851.

Functioning as a midspan device, the injector delivers inline power to the

attached phone. The Cisco IP Phone Power Injector connects between a switch

port and the IP Phone, and supports a maximum cable length of 100m between

the unpowered switch and the IP phone.

PoE power—Provided by a
switch through the Ethernet
cable attached to the Cisco
IP Phone 6851.

To ensure uninterruptible operation of the phone, make sure that the switch

has a backup power supply.

Make sure that the CatOS or IOS version that runs on your switch supports

your intended phone deployment. See the documentation for your switch for

operating system version information.

The documents in the following table provide more information on the following topics:

Cisco switches that work with Cisco IP Phones

•

Cisco IOS releases that support bidirectional power negotiation

•

Other requirements and restrictions about power

•

URLDocument topics

PoE Solutions

http://www.cisco.com/c/en/us/solutions/enterprise-networks/
power-over-ethernet-solutions/index.html

Cisco Catalyst Switches

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http://www.cisco.com/c/en/us/products/switches/index.html

Network Protocols

URLDocument topics

Integrated Service Routers

Cisco IOS Software

Network Protocols

Cisco IP Phones support several industry-standard and Cisco network protocols that are required for voice
communication. The following table provides an overview of the network protocols that the phones support.

Table 6: Supported Network Protocols on the Cisco IP Phone

Bootstrap Protocol (BootP)

Cisco Discovery Protocol
(CDP)

http://www.cisco.com/c/en/us/products/routers/index.html

http://www.cisco.com/c/en/us/products/ios-nx-os-software/
index.html

BootP enables a network device, such as
the Cisco IP Phone, to discover certain
startup information, such as its IP address.

CDP is a device-discovery protocol that
runs on all Cisco-manufactured
equipment.

A device can use CDP to advertise its
existence to other devices and receive
information about other devices in the
network.

Usage NotesPurposeNetwork Protocol

—

The Cisco IP Phone uses CDP to
communicate information such as
auxiliary VLAN ID, per port power
management details, and Quality of
Service (QoS) configuration
information with the Cisco Catalyst
switch.

Domain Name Server
(DNS)

Dynamic Host
Configuration Protocol
(DHCP)

Hypertext Transfer
Protocol (HTTP)

DNS translates domain names to IP
addresses.

DHCP dynamically allocates and assigns
an IP address to network devices.

DHCP enables you to connect an IP
phone into the network and have the
phone become operational without the
need to manually assign an IP address or
to configure additional network
parameters.

HTTP is the standard protocol for transfer
of information and movement of
documents across the Internet and the
web.

Cisco IP Phones have a DNS client
to translate domain names into IP
addresses.

DHCP is enabled by default. If
disabled, you must manually
configure the IP address, subnet
mask, and gateway on each phone
locally.

We recommend that you use the
DHCP custom option 160, 159.

Cisco IP Phones use HTTP for XML
services, provisioning, upgrade and
for troubleshooting purposes.

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Network Protocols

Usage NotesPurposeNetwork Protocol

Hypertext Transfer
Protocol Secure (HTTPS)

Internet Protocol (IP)

Link Layer Discovery
Protocol (LLDP)

Hypertext Transfer Protocol Secure
(HTTPS) is a combination of the
Hypertext Transfer Protocol with the
SSL/TLS protocol to provide encryption
and secure identification of servers.

IP is a messaging protocol that addresses
and sends packets across the network.

LLDP is a standardized network
discovery protocol (similar to CDP) that
is supported on some Cisco and
third-party devices.

Web applications with both HTTP
and HTTPS support have two URLs
configured. Cisco IP Phones that
support HTTPS choose the HTTPS
URL.

A lock icon is displayed to the user
if the connection to the service is via
HTTPS.

To communicate with IP, network
devices must have an assigned IP
address, subnet, and gateway.

IP addresses, subnets, and gateways
identifications are automatically
assigned if you are using the Cisco
IP Phone with Dynamic Host
Configuration Protocol (DHCP). If
you are not using DHCP, you must
manually assign these properties to
each phone locally.

The Cisco IP Phone supports LLDP
on the PC port.

Link Layer Discovery
Protocol-Media Endpoint
Devices (LLDP-MED)

Network Transport
Protocol (NTP)

LLDP-MED is an extension of the LLDP
standard developed for voice products.

NTP is a networking protocol for clock
synchronization between computer
systems over packet-switched,
variable-latency data networks.

The Cisco IP Phone supports
LLDP-MED on the SW port to
communicate information such as:

Voice VLAN configuration

•

Device discovery

•

Power management

•

Inventory management

•

For more information about
LLDP-MED support, see the

LLDP-MED and Cisco Discovery
Protocol white paper at this URL:

http://www.cisco.com/en/US/tech/
tk652/tk701/technologies_white_
paper0900aecd804cd46d.shtml

Cisco IP Phones have an NTP client
integrated into the software.

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