Yealink CP860 SERIES Service manual

Copyright © 2014 YEALINK NETWORK TECHNOLOGY
Copyright © 2014 Yealink Network Technology CO., LTD. All rights reserved. No parts of this
publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, photocopying, recording, or otherwise, for any purpose, without the express written
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its consent to downloading and printing copies of the content provided in this file only for private
use but not for redistribution. No parts of this publication may be subject to alteration,
modification or commercial use. Yealink Network Technology CO., LTD. will not be liable for any
damages arising from use of an illegally modified or altered publication.
THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS GUIDE ARE
SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND
RECOMMENDATIONS IN THIS GUIDE ARE BELIEVED TO BE ACCURATE AND PRESENTED
WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL
RESPONSIBILITY FOR THEIR APPLICATION OF PRODUCTS.
YEALINK NETWORK TECHNOLOGY CO., LTD. MAKES NO WARRANTY OF ANY KIND WITH
REGARD TO THIS GUIDE, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Yealink Network Technology
CO., LTD. shall not be liable for errors contained herein nor for incidental or consequential
damages in connection with the furnishing, performance, or use of this guide.
Hereby, Yealink Network Technology CO., LTD. declares that this phone is in conformity
with the essential requirements and other relevant provisions of the CE, FCC.
This device is marked with the CE mark in compliance with EC Directives 2006/95/EC and 2004/108/EC.
This device is compliant with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause undesired
operation.

Note: This device is tested and complies with the limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
1. Reorient or relocate the receiving antenna.
2. Increase the separation between the equipment and receiver.
3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
4. Consult the dealer or an experience radio/TV technician for help.
To avoid the potential effects on the environment and human health as a result of the
presence of hazardous substances in electrical and electronic equipment, end users of
electrical and electronic equipment should understand the meaning of the crossed-out
wheeled bin symbol. Do not dispose of WEEE as unsorted municipal waste and have to
collect such WEEE separately.
We are striving to improve our documentation quality and we appreciate your feedback. Email
your opinions and comments to [email protected].

Yealink CP860 IP conference phone firmware contains third-party software under the GNU General Public
License (GPL). Yealink uses software under the specific terms of the GPL. Please refer to the GPL for the exact
terms and conditions of the license.
The original GPL license, source code of components licensed under GPL and used in Yealink products can
be downloaded online:
http://www.yealink.com/GPLOpenSource.aspx?BaseInfoCateId=293&NewsCateId=293&CateId=293.

About This Guide
v
The guide is intended for administrators who need to properly configure, customize,
manage, and troubleshoot the IP phone system rather than the end-users. It provides
details on the functionality and configuration of CP860 IP conference phones.
Many of the features described in this guide involve network settings, which could affect
the IP phone’s performance in the network. So an understanding of the IP networking
and prior knowledge of IP telephony concepts are necessary.
The following related documents for CP860 IP conference phones are available:
Quick Start Guide, which describes how to assemble IP phones and configure the
most basic features available on IP phones.
User Guide, which describes basic and advanced features available on IP phones.
Auto Provisioning Guide, which describes how to provision IP phones using the
configuration files.
y000000000037.cfg and <MAC>.cfg template configuration files.
IP Phones Deployment Guide for BroadSoft UC-One Environments, which
describes how to configure the BroadSoft features on the BroadWorks web portal
and IP phones.
For support or service, please contact your Yealink reseller or go to Yealink Technical
Support online: http://www.yealink.com/Support.aspx.
The information detailed in this guide is applicable to the firmware version 72 or higher.
The firmware format is like 37.x.0.x.rom. The second x from left should be greater than or
equal to 72 (e.g., the firmware version of CP860 IP conference phone: 37.72.0.2.rom).
This administrator guide includes the following chapters:
Chapter 1, “Product Overview”describes SIP components and SIP IP phones.
Chapter 2, “Getting Started”describes how to install and connect IP phones and
configuration methods.
Chapter 3, “Configuring Basic Features”describes how to configure basic features
on IP phones.
Chapter 4, “Configuring Advanced Features”describes how to configure
advanced features on IP phones.

Administrator’s Guide for CP860 IP conference phones
vi
Chapter 5, “Configuring Audio Features”describes how to configure audio
features on IP phones.
Chapter 6, “Configuring Security Features”describes how to configure security
features on IP phones.
Chapter 7, “Resource Files”describes the resource files that can be downloaded
by IP phones.
Chapter 8, “Troubleshooting”describes how to troubleshoot IP phones and
provides some common troubleshooting solutions.
Chapter 9, “Appendix”provides the glossary, reference information about IP
phones compliant with RFC 3261 and SIP call flows.

Table of Contents
vii
About This Guide ...................................................................... v
Documentations...............................................................................................................................v
In This Guide ....................................................................................................................................v
Table of Contents ....................................................................vii
Product Overview..................................................................... 1
VoIP Principle....................................................................................................................................1
SIP Components...............................................................................................................................2
Introduction of CP860 IP Conference Phones................................................................................3
Physical Features of CP860 IP Conference Phones ...............................................................4
Key Features of CP860 IP Conference Phones.......................................................................4
Getting Started......................................................................... 7
Connecting the IP Phones ...............................................................................................................7
Connecting the Network and Power ......................................................................................7
Connecting the Optional Extension Microphones ................................................................9
Connecting the Optional USB Flash Drive ...........................................................................10
Connecting the Optional PC or Mobile Device ...................................................................10
Initialization Process Overview ....................................................................................................11
Verifying Startup ............................................................................................................................13
Reading Icons ................................................................................................................................13
Configuration Methods.................................................................................................................14
Phone User Interface..............................................................................................................15
Web User Interface ................................................................................................................15
Configuration Files..................................................................................................................15
Provisioning Server........................................................................................................................16
Supported Provisioning Protocols .........................................................................................16
Setting up the Provisioning Server........................................................................................17
Deploying Phones from the Provisioning Server .................................................................17
Configuring Basic Network Parameters ......................................................................................18
DHCP .......................................................................................................................................18
Configuring Network Parameters Manually ........................................................................24
Configuring Transmission Methods of the Internet Port ......................................................30
Upgrading Firmware.....................................................................................................................32

Administrator’s Guide for CP860 IP conference phones
viii
Configuring Basic Features .................................................... 39
Contrast ..........................................................................................................................................40
Backlight......................................................................................................................................... 42
Web Server Type............................................................................................................................43
User Password ...............................................................................................................................46
Administrator Password ................................................................................................................48
Phone Lock .....................................................................................................................................50
Time and Date ...............................................................................................................................54
Language .......................................................................................................................................66
Loading Language Packs ...................................................................................................... 66
Specifying the Language to Use...........................................................................................67
Logo Customization.......................................................................................................................70
Softkey Layout................................................................................................................................72
Key as Send ...................................................................................................................................77
Dial Plan..........................................................................................................................................81
Replace Rule ...........................................................................................................................82
Dial-now ..................................................................................................................................84
Area Code...............................................................................................................................87
Block Out ................................................................................................................................. 89
Hotline ............................................................................................................................................90
Directory .........................................................................................................................................93
Search Source List in Dialing ........................................................................................................94
Call Log...........................................................................................................................................96
Missed Call Log .............................................................................................................................97
Local Directory ...............................................................................................................................99
Live Dialpad.................................................................................................................................101
Call Waiting.................................................................................................................................. 103
Auto Redial...................................................................................................................................107
Auto Answer.................................................................................................................................109
Anonymous Call........................................................................................................................... 112
Anonymous Call Rejection ..........................................................................................................116
Do Not Disturb..............................................................................................................................118
Busy Tone Delay...........................................................................................................................123
Return Code When Refuse ..........................................................................................................124
Early Media.................................................................................................................................. 126
180 Ring Workaround ..................................................................................................................126
Use Outbound Proxy in Dialog...................................................................................................128
SIP Session Timer ......................................................................................................................... 129
Call Hold.......................................................................................................................................131
Session Timer ...............................................................................................................................136
Call Forward ................................................................................................................................139
Call Transfer .................................................................................................................................147
Network Conference ...................................................................................................................150

Table of Contents
ix
Transfer on Conference Hang Up ..............................................................................................152
Directed Call Pickup.................................................................................................................... 153
Group Call Pickup........................................................................................................................157
Call Return ....................................................................................................................................160
Calling Line Identification Presentation..................................................................................... 162
Connected Line Identification Presentation ..............................................................................164
DTMF.............................................................................................................................................165
Suppress DTMF Display .............................................................................................................. 169
Transfer via DTMF ........................................................................................................................172
Intercom........................................................................................................................................174
Outgoing Intercom Calls...................................................................................................... 174
Incoming Intercom Calls ...................................................................................................... 175
Configuring Advanced Features...........................................179
Distinctive Ring Tones ..................................................................................................................180
Tones .............................................................................................................................................186
Remote Phone Book ....................................................................................................................192
LDAP..............................................................................................................................................196
Message Waiting Indicator ........................................................................................................204
Multicast Paging ..........................................................................................................................208
Sending RTP Stream.............................................................................................................208
Receiving RTP Stream ..........................................................................................................211
Action URL ....................................................................................................................................215
Action URI.....................................................................................................................................230
Server Redundancy.....................................................................................................................232
SIP Server Domain Name Resolution.................................................................................. 239
Static DNS Cache ........................................................................................................................ 243
LLDP...............................................................................................................................................251
VLAN .............................................................................................................................................255
VPN................................................................................................................................................259
Quality of Service ........................................................................................................................262
Network Address Translation .....................................................................................................266
SNMP ............................................................................................................................................268
802.1X Authentication .................................................................................................................272
TR-069 Device Management ......................................................................................................278
IPv6 Support ................................................................................................................................. 283
Configuring Audio Features ..................................................291
Audio Codecs ..............................................................................................................................291
Acoustic Clarity Technology........................................................................................................298
Acoustic Echo Cancellation ................................................................................................. 298
Background Noise Suppression..........................................................................................299
Automatic Gain Control .......................................................................................................299

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x
Voice Activity Detection .......................................................................................................299
Comfort Noise Generation ..................................................................................................301
Jitter Buffer ............................................................................................................................302
Configuring Security Features...............................................305
Transport Layer Security.............................................................................................................. 305
Secure Real-Time Transport Protocol.......................................................................................... 314
Encrypting Configuration Files ...................................................................................................316
Resource Files........................................................................323
Replace Rule Template ...............................................................................................................324
Dial-now Template.......................................................................................................................325
Softkey Layout Template.............................................................................................................326
Directory Template ......................................................................................................................327
Super Search Template...............................................................................................................328
Local Contact File ........................................................................................................................330
Remote XML Phone Book............................................................................................................331
Troubleshooting.....................................................................335
Troubleshooting Methods ...........................................................................................................335
Viewing Log Files..................................................................................................................335
Capturing Packets ................................................................................................................340
Enabling the Watch Dog Feature........................................................................................341
Getting Information from Status Indicators........................................................................342
Analyzing Configuration Files .............................................................................................343
Troubleshooting Solutions ...........................................................................................................343
Why is the LCD screen blank? .............................................................................................343
Why doesn’t the IP phone get an IP address? ...................................................................344
How do I find the basic information of the IP phone?.......................................................344
Why doesn’t the IP phone upgrade firmware successfully?.............................................344
Why doesn’t the IP phone display time and date correctly? ...........................................344
Why do I get poor sound quality during a call? ................................................................345
What is the difference between a remote phone book and a local phone book? .......345
What is the difference between user name, register name and display name? ..........345
How to reboot the IP phone remotely? ..............................................................................345
Why does the IP phone use DOB format logo file instead of popular BMP, JPG and so on?
................................................................................................................................................346
What will happen if I connect both PoE cable and power adapter? Which has the higher
priority?..................................................................................................................................346
What is auto provisioning? ..................................................................................................346
What is PnP? ..........................................................................................................................346
Why doesn’t the IP phone update the configuration? ......................................................347

Table of Contents
xi
What do “on code” and “off code” mean? .......................................................................347
How to solve the IP conflict problem? ................................................................................ 347
How to reset your phone to factory configurations?.........................................................347
How to restore the administrator password? ....................................................................348
Appendix ...............................................................................349
Appendix A: Glossary.................................................................................................................349
Appendix B: Time Zones.............................................................................................................351
Appendix C: Configuring Programable Key .............................................................................353
Appendix D: SIP (Session Initiation Protocol)............................................................................356
RFC and Internet Draft Support ..........................................................................................357
SIP Request............................................................................................................................359
SIP Header ............................................................................................................................ 360
SIP Responses .......................................................................................................................361
SIP Session Description Protocol (SDP) Usage ..................................................................364
Appendix E: SIP Call Flows......................................................................................................... 364
Successful Call Setup and Disconnect ...............................................................................365
Unsuccessful Call Setup—Called User is Busy ..................................................................367
Unsuccessful Call Setup—Called User Does Not Answer ................................................370
Successful Call Setup and Call Hold.................................................................................. 372
Successful Call Setup and Call Waiting .............................................................................374
Call Transfer without Consultation ......................................................................................379
Call Transfer with Consultation............................................................................................383
Always Call Forward............................................................................................................388
Busy Call Forward ................................................................................................................392
No Answer Call Forward .....................................................................................................395
Call Conference.................................................................................................................... 398
Index ......................................................................................403

Product Overview
1
This chapter contains the following information about CP860 IP conference phones:
VoIP Principle
SIP Components
Introduction of CP860 IP Conference Phones
VoIP
VoIP (Voice over Internet Protocol) is a technology using the Internet Protocol instead of
traditional Public Switch Telephone Network (PSTN) technology for voice
communications.
It is a family of technologies, methodologies, communication protocols, and
transmission techniques for the delivery of voice communications and multimedia
sessions over IP networks. The H.323 and Session Initiation Protocol (SIP) are two
popular VoIP protocols that are found in widespread implementation.
H.323
H.323 is a recommendation from the ITU Telecommunication Standardization Sector
(ITU-T) that defines the protocols to provide audio-visual communication sessions on
any packet network. The H.323 standard addresses call signaling and control,
multimedia transport and control, and bandwidth control for point-to-point and
multi-point conferences.
It is widely implemented by voice and video conference equipment manufacturers, is
used within various Internet real-time applications such as GnuGK and NetMeeting and
is widely deployed by service providers and enterprises for both voice and video
services over IP networks.
SIP
SIP (Session Initiation Protocol) is the Internet Engineering Task Force’s (IETF’s) standard
for multimedia conferencing over IP. It is an ASCII-based, application-layer control
protocol (defined in RFC 3261) that can be used to establish, maintain, and terminate
calls between two or more endpoints. Like other VoIP protocols, SIP is designed to
address the functions of signaling and session management within a packet telephony
network. Signaling allows call information to be carried across network boundaries.
Session management provides the ability to control the attributes of an end-to-end call.

Administrator’s Guide for CP860 IP conference phones
2
SIP provides capabilities to:
Determine the location of the target endpoint -- SIP supports address resolution,
name mapping, and call redirection.
Determine the media capabilities of the target endpoint -- Via Session Description
Protocol (SDP), SIP determines the “lowest level” of common services between
endpoints. Conferences are established using only the media capabilities that can
be supported by all endpoints.
Determine the availability of the target endpoint -- A call cannot be completed
because the target endpoint is unavailable. SIP determines whether the called
party is already on the IP phone or does not answer in the allotted number of rings.
It then returns a message indicating why the target endpoint is unavailable.
Establish a session between the origin and target endpoint -- The call can be
completed, SIP establishes a session between endpoints. SIP also supports mid-call
changes, such as the addition of another endpoint to the conference or the change
of a media characteristic or codec.
Handle the transfer and termination of calls -- SIP supports the transfer of calls from
one endpoint to another. During a call transfer, SIP simply establishes a session
between the transferee and a new endpoint (specified by the transferring party)
and terminates the session between the transferee and the transferring party. At
the end of a call, SIP terminates the sessions between all parties.
SIP is a peer-to-peer protocol. The peers in a session are called User Agents (UAs). A
user agent can function as one of the following roles:
User Agent Client (UAC) -- A client application that initiates the SIP request.
User Agent Server (UAS) -- A server application that contacts the user when a SIP
request is received and that returns a response on behalf of the user.
User Agent Client (UAC)
The UAC is an application that initiates up to six feasible SIP requests to the UAS. The six
requests issued by the UAC are: INVITE, ACK, OPTIONS, BYE, CANCEL and REGISTER.
When the SIP session is being initiated by the UAC SIP component, the UAC determines
the information essential for the request, which is the protocol, the port and the IP
address of the UAS to which the request is being sent. This information can be dynamic
and will make it challenging to put through a firewall. For this reason, it may be
recommended to open the specific application type on the firewall. The UAC is also
capable of using the information in the request URI to establish the course of the SIP
request to its destination, as the request URI always specifies the host which is essential.
The port and protocol are not always specified by the request URI. Thus if the request
does not specify a port or protocol, a default port or protocol is contacted. It may be

Product Overview
3
preferential to use this method when not using an application layer firewall. Application
layer firewalls like to know what applications are flowing though which ports and it is
possible to use content types of other applications other than the one you are trying to
let through what has been denied.
User agent server (UAS)
UAS is a server that hosts the application responsible for receiving the SIP requests from
a UAC, and on reception it returns a response to the request back to the UAC. The UAS
may issue multiple responses to the UAC, not necessarily a single response.
Communication between UAC and UAS is client/server and peer-to–peer.
Typically, a SIP endpoint is capable of functioning as both a UAC and a UAS, but it
functions only as one or the other per transaction. Whether the endpoint functions as a
UAC or a UAS depends on the UA that initiates the request.
This section introduces the CP860 IP conference phone. CP860 IP conference phones are
endpoints in the overall network topology, which are designed to interoperate with
other compatible equipments including application servers, media servers,
internet-working gateways, voice bridges, and other endpoints. CP860 IP conference
phones are characterized by a large number of functions, which simplify business
communication with a high standard of security and can work seamlessly with a large
number of SIP PBXs.
CP860 IP conference phones provide a powerful and flexible IP communication solution
for Ethernet TCP/IP networks, delivering excellent voice quality. The high-resolution
graphic display provides content in multiple languages for system status, call log and
directory access. CP860 IP conference phones also support advanced functionalities,
including LDAP, Sever Redundancy and Network Conference.
CP860 IP conference phones comply with the SIP standard (RFC 3261), and they can
only be used within a network that supports this type of phone.
In order to operate as SIP endpoints in your network successfully, CP860 IP conference
phones must meet the following requirements:
A working IP network is established.
Routers are configured for VoIP.
VoIP gateways are configured for SIP.
The latest (or compatible) firmware of CP860 IP conference phones is available.
A call server is active and configured to receive and send SIP messages.

Administrator’s Guide for CP860 IP conference phones
4
This section lists the available physical features of CP860 IP conference phones.
CP860 IP conference phone
Physical Features:
-192 x 64 graphic LCD
-One VoIP account
-HD Voice: HD Codec
-1 mobile phone/PC port: 3.5mm
-1xRJ45 10/100Mbps Ethernet port
-2xEX mic ports
-1xUSB2.0 port
-Security lock port
-3 LED indicators
-Power adapter (optional): AC 100~240V input and DC 5V/2A output
-Power over Ethernet (IEEE 802.3af)
In addition to physical features introduced above, CP860 IP conference phones also
support the following key features when running the latest firmware:
Phone Features
-Call Options: call waiting, call hold, call mute, call forward, call transfer, call
pickup, conference.

Product Overview
5
-Basic Features: DND, auto redial, live dialpad, dial plan, hotline, caller
identity, auto answer.
-Advanced Features: server redundancy, distinctive ring tones, remote phone
book, LDAP, 802.1X authentication.
Codecs and Voice Features
-Codecs: G.722, PCMU, PCMA, G.729, G.723, G.726, iLBC
-VAD, CNG, AEC, PLC, AJB, AGC
-Full-duplex speakerphone with AEC
-Built in microphone arrray, 360 degree vocie pickup
Network Features
-SIP v1 (RFC2543), v2 (RFC3261)
-IPv4/IPv6 support
-NAT Traversal: STUN mode
-DTMF: INBAND, RFC2833, SIP INFO
-Proxy mode and peer-to-peer SIP link mode
-IP assignment: Static/DHCP
-TFTP/DHCP client
-HTTP/HTTPS server
-DNS client
-NAT/DHCP server
Management
-FTP/TFTP/HTTP(S)/PnP auto-provision
-Configuration: browser/phone/auto-provision
-Direct IP call without SIP proxy
-Dial number via SIP server
-Dial URL via SIP server
Security
-HTTPS (server/client)
-SRTP (RFC3711)
-Transport Layer Security (TLS)
-VLAN (802.1q), QoS
-Digest authentication using MD5/MD5-sess
-Secure configuration file via AES encryption
-Phone lock for personal privacy protection
-Admin/User configuration mode

Administrator’s Guide for CP860 IP conference phones
6

Getting Started
7
This chapter provides basic information and installation instructions of CP860 IP
conference phones.
This chapter provides the following sections:
Connecting the IP Phone
Initialization Process Overview
Verifying Startup
Reading Icons
Configuration Methods
Provisioning Server
Configuring Basic Network Parameters
Upgrading Firmware
This section introduces how to install CP860 IP conference phones with the components
in packaging contents.
1. Connecting the Network and Power
2. Connecting the Optional Extension Microphones Kit
3. Connecting the Optional USB Flash Drive
4. Connecting the Optional PC or Mobile Device
Note
You have two options for power and network connections. Your system administrator will
advise you which one to use.
AC power
Power over Ethernet (PoE)
A power adapter, PC or mobile device, extension microphone kit and USB flash drive are
not included in packaging contents. You need to purchase them separately.

Administrator’s Guide for CP860 IP conference phones
8
AC Power (Optional)
To connect the AC power and network:
1. Connect the DC plug of the power adapter to the DC5V port on IP phones and
connect the other end of the power adapter into an electrical power outlet.
2. Connect the included or a standard Ethernet cable between the Internet port on IP
phones and the one on the wall or switch/hub device port.
Power over Ethernet
With the included or a regular Ethernet cable, the CP860 IP conference phone can be
powered from a PoE-compliant switch or hub.