AudioCodes 420HD Use and care manual

AudioCodes Series of High Definition IP Phones
HD VoIP
Administrator’s Manual
420HD IP Phones
with Microsoft®Lync™Server 2010
Version 2.0.1

Administrator's Manual Contents
Version 2.0.1 3 May 2013
Table of Contents
1Introduction .........................................................................................................9
1.1 Deployment Overview............................................................................................10
2Preparing the Microsoft Lync Environment for IP Phones............................11
2.1 Making Sure DHCP Server Options are Correctly Configured...............................11
2.1.1 DHCP Option 43......................................................................................................12
2.1.2 DHCP Option 120....................................................................................................12
2.1.3 DHCP Option 42......................................................................................................12
2.2 Making Sure the DHCP Server is Correctly Configured for Auto Provisioning ......13
2.3 Troubleshooting .....................................................................................................14
2.3.1 Using the Phone LCD to Troubleshoot....................................................................14
2.3.2 Using the Web Interface to Troubleshoot................................................................16
3Creating a Configuration File for Auto Provisioning via DHCP.....................17
3.1 Configuring Network Settings.................................................................................18
3.1.1 Changing LAN Connection Type.............................................................................18
3.2 Configuring DHCP Settings....................................................................................21
3.3 Configuring LAN and PC Port Settings ..................................................................23
3.4 Configuring VLAN Settings ....................................................................................24
3.5 Enabling Telnet Access..........................................................................................25
3.6 Configuring VoIP Settings......................................................................................26
3.6.1 Configuring Dialing Settings ....................................................................................26
3.6.2 Configuring Tones ...................................................................................................26
3.6.2.1 Loading Ring Tones.................................................................................28
3.6.3 Configuring Regional Settings for Call Progress Tones..........................................29
3.6.4 Configuring Default Audio Device............................................................................32
3.6.5 Configuring DTMF ...................................................................................................32
3.7 Configuring Voice Settings.....................................................................................33
3.7.1 Configuring Jitter Buffer...........................................................................................33
3.7.2 Configuring Silence Compression...........................................................................34
3.7.3 Configuring Echo Cancellation................................................................................34
3.8 Activating Services.................................................................................................35
3.8.1 Activating Automatic Dialing....................................................................................35
3.8.2 Enabling Automatic Answer.....................................................................................36
3.8.3 Activating Message Waiting Indication....................................................................37
3.9 Setting Volume Levels ...........................................................................................38
3.9.1 Configuring Automatic Gain Control........................................................................38
3.9.2 Configuring Tone Volume........................................................................................39
3.9.3 Configuring Ringer Volume .....................................................................................39
3.9.4 Configuring Speakerphone (Hands Free) Volume..................................................40
3.9.5 Configuring Handset Volume...................................................................................42
3.9.6 Configuring Headset Volume...................................................................................43
3.10 Configuring Advanced Phone Settings ..................................................................45
3.10.1 Configuring the Phone Directory .............................................................................45
3.10.1.1 Configuring the Corporate Directory ........................................................45
3.10.2 Managing the Local Phone Directory ......................................................................49
3.11 Configuring Speed Dial..........................................................................................50
3.11.1 Adding a Speed Dial................................................................................................50
3.11.2 Deleting a Speed Dial..............................................................................................51
3.11.3 Saving Speed Dial File Configuration to a File........................................................52
3.11.4 Creating a Speed Dial File for Configuration File....................................................52
3.12 Configuring Security...............................................................................................53

420HD IP Phone with Microsoft Lync
Administrator's Manual 4 Document #: LTRT-09930
3.12.1 Using the Encryption Tool........................................................................................53
3.12.1.1 Encrypting Configuration Files.................................................................53
3.12.2 Encrypting Passwords in Configuration File............................................................53
3.12.3 Configuring 802.1X..................................................................................................54
3.12.3.1 Using the Phone LCD...............................................................................54
3.12.3.2 Using the Web Interface / Configuration File ...........................................55
3.12.4 Configuring HTTPS..................................................................................................58
4Configuring Automatic Provisioning...............................................................59
4.1 Configuring Automatic Provisioning via DHCP ......................................................59
4.1.1 Configuring DHCP Option 160 ................................................................................63
4.1.2 Configuring DHCP Options 66 and 67.....................................................................63
4.2 Configuring Automatic Provisioning via Static DNS Record ..................................64
4.3 Configuring Automatic Provisioning via SIP SUBSCRIBE and NOTIFY................66
5Viewing Status and Monitoring........................................................................69
5.1 Viewing Network Status.........................................................................................69
5.1.1 Viewing LAN Status.................................................................................................69
5.1.2 Viewing Port Status .................................................................................................69
5.1.3 Viewing 802.1X Status.............................................................................................69
5.2 Viewing VoIP Status...............................................................................................70
5.2.1 Viewing Phone Status..............................................................................................70
5.2.2 Viewing Line Status.................................................................................................70
5.2.3 Viewing Call Information..........................................................................................71
5.3 Viewing Calls History .............................................................................................71
5.4 Viewing Phone Model / Firmware Version .............................................................72
5.4.1 Viewing from the Web Interface ..............................................................................72
5.4.2 Viewing from the Phone's LCD................................................................................72
6Troubleshooting................................................................................................73
6.1 Unable to Sign in to Lync using Username/Password ...........................................73
6.2 Unable to Authenticate User using PIN..................................................................73
6.3 IP Phone Fails Registration Process......................................................................73
6.4 How to Verify CA Certificate is Trusted / Authorized by IP Phone.........................74
6.5 Invalid Time Server................................................................................................74
6.6 Invalid Time Offset.................................................................................................74
6.7General Corrective Actions....................................................................................75
6.7.1 Restoring Phone Defaults........................................................................................75
6.7.1.1 Restoring Factory Defaults from the Phone LCD.....................................75
6.7.1.2 Restoring Factory Defaults from the Web Interface.................................76
6.7.2 Loading the Configuration File Manually.................................................................76
6.7.3 Recovering Firmware...............................................................................................77
6.7.4 Restarting the Phone...............................................................................................77
6.7.4.1 Restarting the Phone from the LCD.........................................................77
6.7.4.2 Restarting the Phone from the Web Interface..........................................78
6.7.5 Analyzing and Debugging Traffic using Syslog.......................................................79
6.7.6 Enabling Recording to Debug Voice........................................................................81
6.7.7 Activating Port Mirroring ..........................................................................................83
6.7.8 Enabling Tracing......................................................................................................84
AProduct Specifications .....................................................................................85

Administrator's Manual Contents
Version 2.0.1 5 May 2013
List of Figures
Figure 1-1: How to Deploy IP Phones in an Enterprise Customer's Network........................................10
Figure 2-1: DHCP Server Options..........................................................................................................11
Figure 3-1: Web Interface - Configuration File.......................................................................................17
Figure 3-2: Web Interface - Network Settings........................................................................................19
Figure 3-3: Web Interface - Port Mode...................................................................................................23
Figure 3-4: Web Interface - VLAN Settings............................................................................................24
Figure 3-5: Web Interface - Telnet .........................................................................................................25
Figure 3-6: Web Interface - Dialing Page...............................................................................................26
Figure 3-7: Web Interface - Services Page............................................................................................26
Figure 3-8: Web Interface - Uploading Ringing Tones...........................................................................28
Figure 3-9: Web Interface - Tones - Regional Settings..........................................................................29
Figure 3-10: Web Interface - Default Audio Device................................................................................32
Figure 3-11: Web Interface - DTMF Transport Mode.............................................................................32
Figure 3-12: Web Interface –Jitter Buffer..............................................................................................33
Figure 3-13: Web Interface - Silence Compression...............................................................................34
Figure 3-14: Web Interface - Automatic Dialing.....................................................................................35
Figure 3-15: Web Interface - MWI..........................................................................................................37
Figure 3-16: Web Interface - Auto Gain Control.....................................................................................38
Figure 3-17: Web Interface - Tone Volume............................................................................................39
Figure 3-18: Web Interface - Ringer Volume..........................................................................................39
Figure 3-19: Web Interface - Hands Free...............................................................................................40
Figure 3-20: Web Interface - Additional Speaker Volume......................................................................40
Figure 3-21: Web Interface - Handset Volume Settings.........................................................................42
Figure 3-22: Web Interface - Headset Fields .........................................................................................43
Figure 3-23: Web Interface - LDAP........................................................................................................45
Figure 3-24: Web Interface - Corporate Directory..................................................................................48
Figure 3-25: Web Interface - Directory - Add Contact............................................................................49
Figure 3-26: Web Interface - Speed Dial................................................................................................51
Figure 3-27: Web Interface - 802.1X Settings - EAP MD5.....................................................................55
Figure 3-28: Web Interface - 802.1X Settings - EAP TLS......................................................................56
Figure 4-1: Web Interface - Configuring Automatic Provisioning by DHCP...........................................59
Figure 4-2: Web Interface - Automatic Provisioning - DHCP Option 160 ..............................................63
Figure 4-3: Web Interface –Automatic Provisioning - DHCP Options 66/67.........................................63
Figure 4-4: Web Interface - Static DNS Record.....................................................................................64
Figure 5-1: Web Interface - LAN Information .........................................................................................69
Figure 5-2: Web Interface - Port Mode Status........................................................................................69
Figure 5-3: Web Interface - 802.1X Status.............................................................................................69
Figure 5-4: Web Interface - Phone Status..............................................................................................70
Figure 5-5: Web Interface - Line Status .................................................................................................70
Figure 5-6: Web Interface - Call Information..........................................................................................71
Figure 5-7: Web Interface - Call History.................................................................................................71
Figure 5-8: Web Interface - System Information ....................................................................................72
Figure 6-1: Web Interface - Restore Defaults.........................................................................................76
Figure 6-2: Confirm Restore to Factory Defaults....................................................................................76
Figure 6-3: Web Interface - Configuration File.......................................................................................76
Figure 6-4: Web Interface - Load New Configuration File......................................................................77
Figure 6-5: Web Interface - Restart System...........................................................................................78
Figure 6-6: Confirmation Box .................................................................................................................78
Figure 6-7: Web Interface - System Logging..........................................................................................79
Figure 6-8: Web Interface - Recording...................................................................................................81
Figure 6-9: Web Interface - Port Mirroring..............................................................................................83
Figure 6-10: Configuring Tracing............................................................................................................84

420HD IP Phone with Microsoft Lync
Administrator's Manual 6 Document #: LTRT-09930
List of Tables
Table 2-1: DHCP Option 43 Configuration Reference...........................................................................12
Table 2-2: DHCP Option 120 Configuration Reference.........................................................................12
Table 2-3: DHCP Option 120 Configuration Reference.........................................................................12
Table 2-4: Troubleshooting Deployment Problems................................................................................14
Table 2-5: Web Interface –Status & Diagnostics - Tracing...................................................................16
Table 3-1: Network Settings...................................................................................................................19
Table 3-2: DHCP Parameters ................................................................................................................21
Table 3-3: Port Settings Parameters......................................................................................................23
Table 3-4: VLAN Parameters Description..............................................................................................24
Table 3-5: Telnet Parameters.................................................................................................................25
Table 3-6: Dial Tones Parameters .........................................................................................................27
Table 3-7: Ring Tone Parameters..........................................................................................................29
Table 3-8: Regional Parameters ............................................................................................................30
Table 3-9: Audio Device Parameter.......................................................................................................32
Table 3-10: DTMF Description ...............................................................................................................33
Table 3-11: Jitter Buffer Parameters......................................................................................................33
Table 3-12: Silence Compression Parameters ......................................................................................34
Table 3-13: Echo Cancellation Parameter .............................................................................................34
Table 3-14: Automatic Dialing Parameters.............................................................................................35
Table 3-15: Configuration File - Automatic Answer Parameters............................................................36
Table 3-16: MWI Parameters .................................................................................................................37
Table 3-17: Automatic Gain Control Parameters...................................................................................38
Table 3-18: Tone Volume Parameter.....................................................................................................39
Table 3-19: Ringer Volume Parameters.................................................................................................39
Table 3-20: Headset Gain Parameters...................................................................................................44
Table 3-21: LDAP Parameters...............................................................................................................46
Table 3-22: Provisioning Parameters.....................................................................................................49
Table 3-23: Speed Dial Parameters.......................................................................................................51
Table 3-24: EAP MD5 Parameters.........................................................................................................56
Table 3-25: EAP TLS Parameters..........................................................................................................57
Table 4-1: Configuring Automatic Provisioning Performed by DHCP....................................................60
Table 4-2: Static DNS Record Parameters ............................................................................................65
Table 6-1: Syslog Parameters................................................................................................................79
Table 6-2: Packet Recording Parameters..............................................................................................81
Table 6-3: Port Mirroring Parameters.....................................................................................................83
Table A-1: 420HD IP Phone Specifications............................................................................................85
Table A-2: Supported IETF RFCs..........................................................................................................87
Table A-3: Supported SIP Methods........................................................................................................88
Table A-4: Supported SIP Headers........................................................................................................89

Administrator's Manual Notices
Version 2.0.1 7 May 2013
Notice
This manual shows administrators how to set up and configure AudioCodes' 420HD IP Phone
in enterprise network environments.
Information contained in this document is believed to be accurate and reliable at the time of
printing. However, due to ongoing product improvements and revisions, AudioCodes cannot
guarantee accuracy of printed material after the Date Published nor can it accept
responsibility for errors or omissions. Updates to this document and other documents can be
viewed by registered customers at http://www.audiocodes.com/downloads.
© Copyright 2013 AudioCodes Ltd. All rights reserved.
This document is subject to change without notice.
Date Published: May-05-2013
Trademarks
AudioCodes, AC, AudioCoded, Ardito, CTI2, CTI², CTI Squared, HD VoIP, HD VoIP
Sounds Better, InTouch, IPmedia, Mediant, MediaPack, NetCoder, Netrake, Nuera, Open
Solutions Network, OSN, Stretto, TrunkPack, VMAS, VoicePacketizer, VoIPerfect,
VoIPerfectHD, What’s Inside Matters, Your Gateway To VoIP and 3GX are trademarks or
registered trademarks of AudioCodes Limited. All other products or trademarks are
property of their respective owners.
WEEE EU Directive
Pursuant to the WEEE EU Directive, electronic and electrical waste must not be disposed
of with unsorted waste. Please contact your local recycling authority for disposal of this
product.
Customer Support
Customer technical support and service are provided by AudioCodes’ Distributors,
Partners, and Resellers from whom the product was purchased. For Customer Support for
products purchased directly from AudioCodes, contact [email protected].
Abbreviations and Terminology
Each abbreviation, unless widely used, is spelled out in full when first used.
Documentation Feedback
AudioCodes continually strives to produce high quality documentation. If you have any
comments (suggestions or errors) regarding this document, please fill out the
Documentation Feedback form on our Web site at http://www.audiocodes.com/downloads.
Your valuable feedback is highly appreciated.

420HD IP Phone with Microsoft Lync
Administrator's Manual 8 Document #: LTRT-09930
Related Documentation
Document Name
420HD IP Phone User’s Manual
420HD IP Phone Quick Guide
Regulatory Information
Compliancy and Regulatory Information can be viewed at :
http://www.audiocodes.com/library.
Note: Throughout this document, where features can be configured using the Web
interface or configuration file, the Web parameter is displayed in the regular
font above its corresponding configuration file parameter, which is enclosed in
square brackets in bold font type.

Administrator's Manual 1. Introduction
Version 2.0.1 9 May 2013
1 Introduction
This Administrator's Manual is intended for system administrators responsible for setting up
and configuring the AudioCodes 420HD IP Phone with Microsoft Lync, in enterprise
network environments.
AudioCodes IP phones are based on AudioCodes' proprietary High Definition (HD) voice
technology, providing clarity and a rich audio experience in Voice-over-IP (VoIP) calls.
The phones are fully-featured telephones that provide voice communication over an IP
network, allowing you to place and receive phone calls, put calls on hold, transfer calls and
so on.
The phones offer a wide variety of management and configuration tools:
LCD
Easy-to-use, menu-driven display screen providing basic phone configuration and
status capabilities
Web Interface
User-friendly user interface that runs on a Web browser (Microsoft Internet Explorer
recommended).
Configuration File
Text-based file created using any plain text editor such as Microsoft’s Notepad,
containing configuration parameters. Loaded to the phone using the Web interface or
a TFTP, FTP, HTTP or HTTPS server.
CLI over Telnet
For detailed instructions on how to install the phone and operate its features, refer to the
User’s Manual.

420HD IP Phone with Microsoft Lync
Administrator's Manual 10 Document #: LTRT-09930
1.1 Deployment Overview
The figure below shows how to deploy AudioCodes IP phones in an enterprise customer's
network.
Figure 1-1: How to Deploy IP Phones in an Enterprise Customer's Network

Administrator's Manual 2. Preparing the Microsoft Lync Environment for IP Phones
Version 2.0.1 11 May 2013
2 Preparing the Microsoft Lync
Environment for IP Phones
Before plugging in and playing the IP phones in an enterprise's Lync environment, make
sure that the environment is ready for them.
To prepare it for IP phones, you must set up:
1. Front End Lync Server
2. Domain Controller, including:
a. Active Directory, LDAP service
b. DNS service
c. DHCP service
d. NTP service
3. Unified Messaging Server (optional)
4. Mediant™Gateway
5. SBA Server (optional)
For details, refer to Microsoft's website at:
http://technet.microsoft.com/en-us/library/gg425854%28v=ocs.14%29.aspx
2.1 Making Sure DHCP Server Options are Correctly
Configured
This section shows how to ensure that your enterprise's DHCP server options are correctly
configured and that the network environment is ready for deployment of IP phones.
For detailed Microsoft instructions on setting up DHCP for the IP phone, see:
http://technet.microsoft.com/en-us/library/gg398369(v=ocs.14).aspx
Figure 2-1: DHCP Server Options
Make sure that
DHCP Option 43 (comprising 001-005 in the figure above) is correctly configured
(see Section 2.1.1 on page 12 below)
DHCP Option 120 is correctly configured (see Section 2.1.2 on page 12 below)
DHCP Option 42 is correctly configured (see Section 2.1.3 on page 12 below)

420HD IP Phone with Microsoft Lync
Administrator's Manual 12 Document #: LTRT-09930
Correct configuration of these three is critically important. The other DHCP options shown
in the figure above are also important but are less susceptible to inaccuracies than these.
2.1.1 DHCP Option 43
Option 43 comprises the five sub-options 001-005 shown in the figure above and in the
table below. These point the phone to the location of the Certificate Provisioning service on
the Lync server. Use the table as a reference to make sure that each sub-option is
correctly configured.
Refer also to http://technet.microsoft.com/en-us/library/gg398088(v=ocs.14).aspx
Table 2-1: DHCP Option 43 Configuration Reference
Sub-Option Number
Sub-Option Name
ASCII Value (example)
001
UCIdentifier
MS-UC-Client
002
URLScheme
https
003
WebServerFQDN
lyncserver.domain.com
004
WebServerPort
443
005
CertProvRelPath
/CertProv/CertProvisioningService.svc
2.1.2 DHCP Option 120
Option 120, which includes the Lync Server’s fully qualified domain name (FQDN) as
shown in the table below, is required for the certification authority (CA) pool Registrar.
Use the table as reference to make sure Option 120 is correctly configured.
Table 2-2: DHCP Option 120 Configuration Reference
Option Number
Option Name
ASCII Value (example)
120
UCSipServer
lyncserver.domain.com
2.1.3 DHCP Option 42
Option 42 specifies the servers that provide NTP /SNTP for the network. Make sure that
NTP server IP addresses are correct, as shown in the table below.
Table 2-3: DHCP Option 120 Configuration Reference
Option Number
Option Name
String (example)
42
NTP Servers
10.59.0.20, 10.59.0.21

Administrator's Manual 2. Preparing the Microsoft Lync Environment for IP Phones
Version 2.0.1 13 May 2013
2.2 Making Sure the DHCP Server is Correctly
Configured for Auto Provisioning
After creating a cfg configuration file (see Section 3 on page 17), place it - and the software
file (img) and other files such as tone files - on a provisioning server from where the IP
phones can download and install it.
To get the URLs to this provisioning server, the IP phones use DHCP. The provisioning
server can be HTTP/S, TFTP or FTP.
The phone features automatic update capability to update the configuration and the
software. Checks for newer configuration files and software versions are routinely
automatically performed. Manual checks can also be performed.
To make sure the feature functions correctly:
1. Verify that the provisioning server is running and that the configuration and firmware
files are located in the correct location on it.
2. Connect the phone to the IP network and then to power.
3. On the DHCP server, configure DHCP Option 160 with the URL to the provisioning
server where the configuration and firmware files are located.
By default, the IP phone uses Option 160 which has highest priority.
If absent, the IP phone uses Options 66/67 for TFTP.
The following syntax is available for DHCP option 160:
<protocol>://<server IP address or host name>/<firmware file
name>;<configuration file name>
<protocol>://<server IP address or host name>
<protocol>://<server IP address or host name>/<firmware file name>
<protocol>://<server IP address or host name>/;<configuration file name>
Where <protocol> can be "ftp", "tftp", "http" or "https"
4. During DHCP negotiation, the phone requests DHCP options 66/67/160 to receive
provisioning information. The DHCP server responds with Option 160 providing the
provisioning URL, or Options 66 and 67 providing the TFTP IP address and firmware
file name respectively.
5. The phone then checks whether new firmware is available by checking the firmware
file header. If the version is different from the one currently running on it, the phone
downloads the complete image and burns it to its flash memory.
6. If new firmware is unavailable, the phone checks whether a new configuration file is
available on the server. If available, the phone downloads it and updates the phone’s
configuration after verifying that the configuration file is related to the phone model.
When a configuration update is needed, the phone might reboot.
Notes:
Only img (firmware) and cfg (configuration) files can be used.
In the DHCP Discover message, the phone publishes its model name in
Option fields 60 and 77 (e.g., 420HD). To provide different provisioning
information to different models, set up a policy in the DHCP server
according to phone model name.
If the phone is powered off during provisioning, it becomes unusable;
perform a recovery process (see Section 5 on page 69).
Also see Section 4on page 59 for more information on DHCP and on
alternative provisioning methods.

420HD IP Phone with Microsoft Lync
Administrator's Manual 14 Document #: LTRT-09930
2.3 Troubleshooting
2.3.1 Using the Phone LCD to Troubleshoot
Use the table below to help troubleshoot deployment problems that can occur after
preparing the enterprise network environment for IP phone deployment.
Tip: Use the first phone that you deploy as an indicator for the entire deployment. If
the first phone plugs in and plays without irregularities, all phones deployed
after it should also. If it doesn't, troubleshoot as shown in this section before
proceeding to deploy the other phones.
Note: After preparing the network and verifying readiness, make sure that the Lync
PC client is operating, i.e., that the Lync server-client (Front End) setup is
correct. Only after this, deploy the first phone.
Table 2-4: Troubleshooting Deployment Problems
Problem / LCD Notification
Corrective Action
Certificate problem
LCD Notification:
"Failed to validate certificate" -or-
"Failed to obtain user certificate"
Three possible actions:
Make sure that DHCP Option 43, sub-option 5,
was enabled in the DHCP server. If it wasn't,
enable it.
Make sure you can access the Lync Web service
URL:
https://lyncsvrWebPoolFQDN:443/CertProv/CertProvisioningService.svc
Query the LDAP server:
_ldap._tcp.<DOMAIN name>
Make sure it was enabled. If it wasn't, enable it in
order to get the root certificate.
Synchronization problem.
LCD Notification:
"Failed to connect to time server" -or-
"PIN internal error"
Make sure that at least one of the following was
configured to enable synchronization:
NTP server, via DNS SRV record
(_ntp._udp.<SIP domain>pointing to NTP
server)
NTP server, returned via DHCP Option 42
Time.windows.com
Time.nist.gov
Configuration Parameter (manually)
Phone not initializing
Make sure that DHCP is enabled.
Cannot find SIP server for 'Domain
name'. Phone can't perform registration.
LCD Notification:
"Failed to connect <domain> server"
-or-
"Cannot find Lync server at <>"
Make sure that at least one of the following is
enabled in the DNS server:
_sipinternaltls._tcp.<domain> (for TLS)
DHCP results (Option 120) (for TLS)
_sipinternal._tcp.<Domain> (for TCP)
DHCP results (Option 120) (for TCP)
_sip._tls.<Domain> (for TLS)
_sip._tcp.<Domain> (for TCP)

Administrator's Manual 2. Preparing the Microsoft Lync Environment for IP Phones
Version 2.0.1 15 May 2013
Problem / LCD Notification
Corrective Action
LCD Notification:
"Location look-up failed.
Please enter your address."
Make sure that 'Location look up' is configured by
the management shell in the Lync server.
LCD Notification:
"LAN Link failure"
The LAN link is disconnected. This is a general
networking problem that's beyond the scope of this
document. Either there's a physical cabling issue or
there's a local or VLAN communications problem.
LCD Notification:
"Duplicate IP"
This is a general networking problem. The IP address
configured for this endpoint was already configured
for another.
In the DHCP server, delete the duplicate IP
address and request another.
LCD Notification:
"Failed to connect to Lync server"
This is a general networking problem beyond the
scope of this document. If a communications problem
occurs in the enterprise network, for example, if the
server goes down, this notification is displayed on the
phone LCD.
LCD Notification:
"PIN invalid phone info"
The phone number or extension that was entered is
invalid.
Make sure that the correct information was entered
in the phone LCD and in the Lync server interface,
and that they tally.
Verify in the Lync server interface that the PIN is
enabled and if it isn't, enable it.
LCD Notification:
"PIN not set"
Verify in the Lync server interface that a PIN was
configured for this user account.
If it wasn't, create a PIN for the account.
LCD Notification:
"PIN expired"
In the Lync server interface, renew the PIN
expiration policy.
LCD Notification:
"PIN account disabled"
Verify in the Lync server interface that the account
was enabled. If it wasn't, enable it.
LCD Notification:
"PIN internal error"
Test the PIN Authentication process on the Lync
server: Run in the server shell the emulate cmdlet:
Test-CsPhoneBootstrap -PhoneOrExt nnnn -PIN nnnn
If the test result is 'fail', there's a configuration
error on the Lync server side, hence the PIN sign-
in failure on the phone side. To troubleshoot, see:
http://technet.microsoft.com/en-us/library/gg412852.aspx
Note:
The ringer LED remains red until the problem is corrected.
Users cannot dial or initiate calls if an LCD notification is displayed.

420HD IP Phone with Microsoft Lync
Administrator's Manual 16 Document #: LTRT-09930
2.3.2 Using the Web Interface to Troubleshoot
This section shows how to use the Web interface to troubleshoot problems.
To use the Web interface to troubleshoot:
1. Obtain the phone's IP address if the DHCP server successfully automatically provided
one: Press the MENU key on the dial pad and in the phone's LCD, navigate to and
select Status > Network Status
2. Scroll down to the IP Address and note it.
3. Open your browser and use the IP address to access the phone's Web interface.
4. Select the Status & Diagnostics tab > Diagnostics > Tracing:
Table 2-5: Web Interface –Status & Diagnostics - Tracing

Administrator's Manual 3. Creating a Configuration File for Auto Provisioning via DHCP
Version 2.0.1 17 May 2013
3 Creating a Configuration File for Auto
Provisioning via DHCP
Note: This section is intended for distributors / integrators responsible for configuring
IP phones specific to customer countries / time zones / environments.
The sections below show how to configure a single IP phone.
After configuring, you'll then save the configuration as a cfg file on your PC and apply it to
all IP phones deployed in the customer's enterprise, downloaded automatically from a
provisioning server using DHCP (see Section 2.2 on page 13).
To save the cfg file you configure:
1. Access the Configuration File page in the Web interface (Management tab > Manual
Update menu > Configuration File):
Figure 3-1: Web Interface - Configuration File
2. Click the Save Current Configuration File button and save the cfg file in a folder on
your PC.
3. Apply the cfg file to all IP phones in the customer's enterprise (see Section 2.2 on
page 13).
Note: When creating a new configuration file, ensure that the system/type parameter
in the cfg file is set to the proper phone model (e.g.,420HD).
Read the sections below for information on how to configure a single phone.

420HD IP Phone with Microsoft Lync
Administrator's Manual 18 Document #: LTRT-09930
3.1 Configuring Network Settings
This section shows how to reconfigure IP network settings, including:
LAN Connection Type (see Section 3.1.1 below)
Partial DHCP (see Section 3.2 below)
3.1.1 Changing LAN Connection Type
The phone’s LAN Connection Type can be:
Automatic IP (automatically provisioned by DHCP server from where the LAN IP
address is obtained) (default)
Static IP Address
This section shows how to change LAN Connection Type in the phone's LCD and through
the Web interface.
To change LAN Connection Type in the phone's LCD:
1. In the LCD access the Network Settings screen (MENU key > Administration >
Network Settings):
2. Select LAN Connection Type:
3. Navigate to Static IP.
4. Define a static IP addressing scheme:
a. Press the Edit softkey:

Administrator's Manual 3. Creating a Configuration File for Auto Provisioning via DHCP
Version 2.0.1 19 May 2013
b. Press the Edit softkey:
c. Enter the new address in dotted-decimal notation, using the following keys:
Navigation control:moves the cursor left or right in the IP address
Clear softkey: deletes the digit to the left of the cursor.
d. Press the Save and then Apply softkey.
5. Navigate to and configure Netmask, Gateway, Primary DNS and Secondary DNS as
you did IP Address.
To change LAN Connection Type in the Web interface:
1. Access the Network Settings page (Configuration tab > Network Connections
menu > Network Settings) and select the Static IP option:
Figure 3-2: Web Interface - Network Settings
2. Configure the parameters using the table below as reference and click Submit.
Table 3-1: Network Settings
Parameter
Description
Note: To add a value to these parameters, enter network/ followed by the parameter name, equal
sign and then the value (e.g. network/lan_type=DHCP).
IP Type
[network/lan_type]
Defines the IP addressing method:
[STATIC] Static IP - Phone’s IP address is defined
manually
[DHCP] Automatic IP DHCP (default) - Phone’s IP
address is acquired automatically from a DHCP
server
network/lan/fixed_ip
This section defines parameters relevant if 'lan_type'
is configured to STATIC or the corresponding
'network/lan/dhcp' parameter is set to 1.
IP Address
[network/lan/fixed_ip/ip_address]
The LAN IP address

420HD IP Phone with Microsoft Lync
Administrator's Manual 20 Document #: LTRT-09930
Parameter
Description
Subnet Mask
[network/lan/fixed_ip/netmask]
The subnet mask address
Default Gateway Address
[network/lan/fixed_ip/gateway]
The IP address of the default gateway.
Domain Name
[network/lan/fixed_ip/domain_name]
The domain name.
Domain Name Server (DNS)
Primary DNS
[network/lan/fixed_ip/primary_dns]
The primary DNS server address.
Secondary DNS
[network/lan/fixed_ip/secondary_dns]
The secondary DNS server address. The phone
connects to this server if the primary DNS server is
unavailable.