NEC DT820 Series User manual

DT820 Phone User Manual
For UNIVERGE 3C Communications
and SIP@Net Platforms

DT820 Phone User Manual
For UNIVERGE 3C Communications
and SIP@Net Platforms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HTTP://WWW.NEC.COM
PART NUMBER 540-441R6
DT820 FIRMWARE VERSION 4.3
3C UNIFIED COMMUNICATION SYSTEM VERSION
9.1.2

iv P/N 540-441r3 DT820 Phone User Guide
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NOTICES
Copyright © 2008-2018 NEC Corporation. All rights reserved.
NEC Corporation (“NEC”) is continually upgrading and developing the products
described in this publication. The information contained herein is subject to change
without notice. Written permission is required prior to reproduction of any of the work
covered here by copyright.
For warranty information, see the License Agreement included with the software.
NEC, the NEC logo, UNIVERGE, and UNIVERGE 3C (hereinafter referred to as the
“3C”) are trademarks or registered trademarks of NEC Corporation.
Spreed, struktur, and icoya are registered trademarks of Struktur AG.
AudioCodes, AC, HD VoIP, HD VoIP Sounds Better, IPmedia, Mediant, MediaPack,
OSN, SmartTAP, VMAS, VoIPerfect, VoIPerfectHD, Your Gateway To VoIP and 3GX
are trademarks or registered trademarks of AudioCodes Limited.
Windows, Microsoft, Outlook, and Exchange are trademarks or registered trademarks
of Microsoft Corporation in the United States and other countries.
Other products mentioned in this document are the property of their respective
owners and are also subject to copyright, trademark, and intellectual property
protection as applicable by law.
NEC Enterprise Communication Technologies, Inc., is a wholly owned subsidiary of
NEC Corporation, Japan. All Rights Reserved.
UNIVERGE 3C documentation and UNIVERGE 3C System Requirements apply to
the standard installation, configuration, administration and maintenance of the 3C
system except where superseded by instructions in DoD Certified Session Controller
(DoD SC) environments. Certification by the Joint Interoperability Test Command
(JITC) for the US Department of Defense (DoD) and LSC (Local Session Controller)
certification requires the installation and configuration of additional 3C system
security and operational features using the Required Installation Checklist included in
the Unified Capabilities Session Controller Deployment Guide. If a system is rebuilt or
upgraded for any reason, the system must again be modified to meet the
configuration settings as documented in the Required Installation Checklist.
U.S. Patent Numbers 5,892,764 and 6,735,208 and related Foreign Patents.
Australian Patent Number WO07/095418.
Other U.S. and Foreign Patents Pending.

. . . . .
DT820 Phone User Guide P/N 540-441r3 v
DOCUMENT REVISION HISTORY
540-441r1 February 2016 Initial release, NEC Std SIP 4.0 for DT820
540-441r2 June 2016 Edits and corrections, NEC Std SIP 4.0 for DT820
540-441r3 June 2017 Edits and corrections, NEC Std SIP 4.1 for DT820
540-441r4 January 2018 Edits and corrections, NEC Std SIP 4.1 for DT820
540-441r5 March 2018 Edits and corrections for v9.1.0
540-441r6 August 2018 Edits and corrections, NEC Std SIP 4.3 for DT820/DTG820C

vi P/N 540-441r3 DT820 Phone User Guide
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DOCUMENT FEEDBACK
To submit feedback, comments, changes, or additional information related to this
document, please contact your NEC Technical Assistance Center(s).
Please use the local regional contact information listed above for contact information.
When contacting NEC TAC, please have the following information available:
DOCUMENT INFORMATION
Document Name and Product Number:
________________________________________________________
System Release Version:
________________________________________________________
REGIONAL CONTACTS
NEC HEADQUARTERS & ASIA OPERATIONS
NEC Corporation
7-1, Shiba 5-chome Minato-ku,
Tokyo 108-8001 Japan
Telephone: [phone]
Fax: [phone]
Website: www.nec.co.jp/
EUROPE, MIDDLE EAST AND AFRICA
NEC Enterprise Solutions
Olympia 4, 1213 NT Hilversum,
The Netherlands
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Fax: [phone]
Website: www.nec-enterprise.com
Postal Address
NEC Nederland BV
P.O. BOX 32, 1200 JD Hilversum

. . . . .
DT820 Phone User Guide P/N 540-441r3 vii
The Netherlands
NORTH AMERICA
NEC Corporation of America
3929 W John Carpenter Fwy
Irving, TX 75063-2909
Telephone: [phone] (800-2400-NEC)
Fax: [phone]
Authorized Associates and Resellers:
Phone: [phone]
Fax: [phone]
Website: www.necam.com
WORLDWIDE OFFICES
For the latest information on offices in your area, visit www.nec.com and select your
area.

viii P/N 540-441r3 DT820 Phone User Guide

DT820 Phone User Guide Contents i
Contents
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CONTENTS
Notices ................................................................................................................ iv
Document Revision History .............................................................................. v
Document Feedback ........................................................................................... vi
Document Information ..................................................................................... vi
1 Overview.....................................................................................1-1
Supported Phone Models ..............................................................................1-1
2 Introduction to the DT820 Phones ...........................................2-3
DT820 Series Phones .......................................................................................2-3
Platform Compatibility....................................................................................2-3
NEC DT820 Series IP Phone Lineup ............................................................2-3
Keys and Parts ..............................................................................................2-5
To display the Menu List using the Menu Key .........................................2-16
Gigabit Ethernet Licensed Support..............................................................2-18
ITY-8LDX Phone Specifics..............................................................................2-19
Programmable Key Information Display ......................................................2-19
Using the Scroll Key.................................................................................2-22
Speed Dial Key Numbering for ITY-8LDX Phones ..................................2-23
Presence Monitor Settings and Speed Dial Keys ....................................2-23
ITY-6D-1 Phone Specifics...............................................................................2-25
Speed Dial Key Numbering for ITY-6D-1 Phones....................................2-25
3 Installation................................................................................3-27
Before You Begin ........................................................................................3-27
Adjusting Angle of Tilt Leg...........................................................................3-27
To raise tilt leg..........................................................................................3-27
To lower tilt leg.........................................................................................3-28
Connecting the Phone .................................................................................3-29
To attach the handset ..............................................................................3-29
To connect LAN cable to the phone.........................................................3-30
To connect a headset (Optional)..............................................................3-30
To connect a computer (Optional) ...........................................................3-31

CONTENTS
ii Contents DT820 Phone User Guide
4 Basic Settings/Configuration..................................................4-33
Basic Setup with the Cursor Pad ....................................................................4-33
To adjust the ringing volume....................................................................4-34
To adjust the Soft Ring volume (SIP@Net Platforms) .............................4-34
To adjust the headset ringing volume ......................................................4-34
To adjust the call volume (handset) .........................................................4-34
To adjust the call volume (headset) .........................................................4-34
To adjust the call volume (speaker) .........................................................4-34
Basic Setup with the Menus and Cursor Pad..................................................4-34
To select an Internal Ringtone .................................................................4-34
To select an External Ringtone................................................................4-35
To enable an external headset ................................................................4-36
To set external headset ringing (Optional)...............................................4-36
To set the Call Waiting volume ................................................................4-36
To set the Hold Reminder volume ...........................................................4-37
To change the Display Language ............................................................4-37
To set the Date Format ............................................................................4-37
To set the Time Format............................................................................4-38
To adjust the LCD contrast ......................................................................4-38
To change the LCD Backlight Timeout (DT820 only) ..............................4-38
To disable the Screen Saver (DT820C only) ...........................................4-39
To change the Screen Saver Waiting Time (DT820C only).....................4-39
To edit the Dial Preference ......................................................................4-39
To Clear User Settings.............................................................................4-40
To Clear Personal Directory.....................................................................4-41
To Clear Call History................................................................................4-42
To restart your phone...............................................................................4-43
To view the phone settings ......................................................................4-43
To view the firmware information for your phone.....................................4-43
To view the IP address of your phone .....................................................4-43
To view the maximum numbers of calls you can handle
on your phone ..........................................................................................4-44
Speed Dial and Personal Directory Character Sets ........................................4-44
5 Security Features.....................................................................5-49
Secure Calls ................................................................................................5-49
Secure Signaling......................................................................................5-49
Secure Media...........................................................................................5-50
Errors and Debugging .................................................................................5-51
6 Basic Phone Operation ...........................................................6-53
Basic Call Operation .......................................................................................6-54
Answering Calls...........................................................................................6-54
To answer an incoming call .....................................................................6-54
To reject an incoming call ........................................................................6-54
Placing Calls................................................................................................6-54
To place an external call ..........................................................................6-54
To place an internal call ...........................................................................6-55

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CONTENTS
DT820 Phone User Guide Contents iii
Call Duration................................................................................................6-55
Ending a Call ...............................................................................................6-55
Redialing a Number.....................................................................................6-55
Hold/Resume a Call.....................................................................................6-56
To hold/resume a call...............................................................................6-56
Using a Headset to Make and Receive Calls ..............................................6-56
To make calls with your headset..............................................................6-56
To answer calls with your headset...........................................................6-57
To transfer the current call to your headset .............................................6-57
Call Waiting/Concurrent Calls .........................................................................6-57
To answer the other incoming call (Call Waiting).....................................6-57
To place a second call (Concurrent call)..................................................6-57
To switch between calls ...........................................................................6-58
Call Transferring and Conferencing ................................................................6-58
Conferencing Calls ......................................................................................6-58
To conference two calls ...........................................................................6-58
To hold/resume a conference call............................................................6-59
To call another party while on a conference call......................................6-59
To split a conference call .........................................................................6-59
To switch between two calls ....................................................................6-60
Hang Up while conferencing ....................................................................6-60
Transferring Calls ........................................................................................6-60
Attended transfer .....................................................................................6-60
Blind transfer............................................................................................6-61
Unattended transfer .................................................................................6-61
To shuttle between calls during an Attended Transfer.............................6-61
To split calls into two calls when transferring (Transfer split)...................6-62
Advanced Messaging Features.......................................................................6-62
Message Waiting Indication.........................................................................6-62
Accessing Voice Mail...................................................................................6-62
7 Programmable Keys ................................................................7-63
Speed Dial and Programmable Keys ..............................................................7-64
Speed Dial Key Configuration .....................................................................7-64
Duplicate Entries in Speed Dials..............................................................7-64
Using the Feature Key .............................................................................7-64
To view Speed Dial Key information for Programmed
Speed Dial Keys ......................................................................................7-65
Speed Dial Key Operation ...........................................................................7-65
To originate a call from Speed Dial Keys.................................................7-65
Speed Dial Key Programming Examples ....................................................7-66
To add a Programmable Key/Speed Dial Key
without a Personal Directory entry ...........................................................7-66
To add a Programmable Key as a Speed Dial Key
with a Personal Directory entry using the Feature Key............................7-69
To add a Programmable Key as a Speed Dial Key
with a Personal Directory Entry from the Personal Directory...................7-71
To add a Speed Dial Key to an existing Personal Directory entry ...........7-74
To configure a Programmable Key as a Speed Dial Key
for a star/hash code .................................................................................7-78

CONTENTS
iv Contents DT820 Phone User Guide
Editing Speed Dial Keys ..............................................................................7-79
To edit a Speed Dial Key .........................................................................7-80
Deleting Speed Dial Keys............................................................................7-84
To delete the Speed Dial information ONLY
from a Personal Directory Entry...............................................................7-84
To delete an entire Speed Dial and Personal Directory entry..................7-85
To delete a Speed Dial only entry............................................................7-86
8 Microbrowser and
Enhanced Programmable Keys8-87
Using the Microbrowser ..................................................................................8-87
Feature Key with the Microbrowser .............................................................8-87
To view the Microbrowser Home page ....................................................8-88
Hot Desking .................................................................................................8-90
To Login using Hot Desking.....................................................................8-90
To Logout of Hot Desking session ...........................................................8-91
Handset Forwarding ....................................................................................8-92
To set a Handset Forwarding Condition ..................................................8-93
To set Handset forwarding using star codes............................................8-96
To set Conditional Handset forwarding - No Answer using star codes....8-96
To set Conditional Handset forwarding - Busy using star codes .............8-97
To clear Handset Forwarding Conditions.................................................8-97
To clear Handset forwarding using star codes.........................................8-98
Call Recording .............................................................................................8-98
Supervise a Call ..........................................................................................8-98
View System Call History ..........................................................................8-101
To view call logs via the Microbrowser ..................................................8-101
To view the Conference listing...............................................................8-102
Search Directory/Corporate Directory .......................................................8-104
To Search the 3C System Directory ......................................................8-104
Enhanced Programmable Keys ....................................................................8-107
Enhanced BLFs .........................................................................................8-107
Using Enhanced Programmable Keys ..........................................................8-108
Workgroup Features (Enhanced BLF Keys)..............................................8-108
To place a call to a member of your workgroup.....................................8-108
To pick up a ringing call to a member of your workgroup ......................8-108
To transfer a call to a member of your workgroup .................................8-109
To pickup a held call from a member of your workgroup .......................8-109
To place a call to a member of your workgroup.....................................8-109
To pick up a ringing call to a member of your workgroup ......................8-110
To transfer a call to a member of your workgroup .................................8-110
Park Extension Key ...................................................................................8-110
To park a call to a Park Extension .........................................................8-110
To pickup a call on a Park Extension.....................................................8-111
Call Back key.............................................................................................8-111
Using the Call Back Key ........................................................................8-111
To reset the number for a Call Back key................................................8-111
To clear Call Back..................................................................................8-111
Monitor/Supervise Key ..............................................................................8-111
To Monitor a Call (Workgroup scenario) ................................................8-111

. . . . .
CONTENTS
DT820 Phone User Guide Contents v
Record Key................................................................................................8-112
To stop the recording a call....................................................................8-112
Send to VM Key.........................................................................................8-113
Hot Desk Key.............................................................................................8-113
To log out of your Hot Desk session ......................................................8-113
Trunk Dial Key ...........................................................................................8-113
To seize a trunk to place a call ..............................................................8-114
DND Key....................................................................................................8-114
To set Do Not Disturb for your phone ....................................................8-114
To disable Do Not Disturb for your phone..............................................8-115
Handset Forwarding Key ...........................................................................8-115
To set Forwarding for your phone..........................................................8-116
To disable Forwarding for your phone ...................................................8-116
9 DT820 Color Microbrowser and Enhanced Programmable Keys9-
117
Using the Microbrowser ................................................................................9-117
Feature Key with the Microbrowser ...........................................................9-117
To view the Microbrowser Home page ..................................................9-118
Hot Desking ...............................................................................................9-120
To Login using Hot Desking...................................................................9-120
To Logout of Hot Desking session .........................................................9-121
Handset Forwarding ..................................................................................9-122
To set a Handset Forwarding Condition ................................................9-123
To set Handset forwarding using star codes..........................................9-126
To set Conditional Handset forwarding - No Answer using star codes..9-126
To set Conditional Handset forwarding - Busy using star codes ...........9-126
To clear Handset Forwarding Conditions...............................................9-127
To clear Handset forwarding using star codes.......................................9-127
Call Recording ...........................................................................................9-128
Supervise a Call ........................................................................................9-129
View System Call History ..........................................................................9-132
To view call logs via the Microbrowser ..................................................9-132
List Conferences........................................................................................9-133
To view the Conference listing...............................................................9-133
Search Directory/Corporate Directory .......................................................9-135
To Search the 3C System Directory ......................................................9-135
Enhanced Programmable Keys ....................................................................9-137
Enhanced Programmable Key Support by phone model ..........................9-138
Enhanced BLFs .........................................................................................9-140
To place a call to a member of your workgroup.....................................9-141
To pick up a ringing call to a member of your workgroup ......................9-141
To transfer a call to a member of your workgroup .................................9-141
To pickup a held call from a member of your workgroup .......................9-141
To place a call to a member of your workgroup.....................................9-142
To pick up a ringing call to a member of your workgroup ......................9-142
To transfer a call to a member of your workgroup .................................9-143
Park Extension Key ...................................................................................9-143
To park a call to a Park Extension .........................................................9-143
To pickup a call on a Park Extension.....................................................9-143

CONTENTS
vi Contents DT820 Phone User Guide
Monitor/Supervise Key ..............................................................................9-144
To Monitor a Call (Workgroup scenario) ................................................9-144
Record Key................................................................................................9-144
To stop the recording a call....................................................................9-144
Send to VM Key.........................................................................................9-145
Hot Desk Key.............................................................................................9-145
To log out of your Hot Desk session ......................................................9-145
Trunk Dial Key ...........................................................................................9-146
To seize a trunk to place a call ..............................................................9-146
DND Key....................................................................................................9-146
To set Do Not Disturb for your phone ....................................................9-147
To disable Do Not Disturb for your phone..............................................9-147
Handset Forwarding Key ...........................................................................9-147
To set Forwarding for your phone..........................................................9-148
To disable Forwarding for your phone ...................................................9-148
10 Call History, and the Corporate and Personal Directories10-149
The Help key ...............................................................................................10-150
Using the Help key...............................................................................10-150
The Menu Key.............................................................................................10-150
Call History..................................................................................................10-150
Access Call History using the Menu Key .............................................10-151
Access Call History using the Cursor Pad ...........................................10-151
To clear the Missed Calls icon, Message and Call Indicator Lamp
(if enabled) ...........................................................................................10-152
To view Missed Calls ...........................................................................10-152
To view Received Calls........................................................................10-152
To view Outgoing Calls ........................................................................10-152
To dial an internal number from the Call History using the handset ....10-153
To dial an external number from the Call History.................................10-153
To add a Call History entry to the Personal Directory..........................10-153
To delete a specific entry from the Call History ...................................10-156
To delete Call History for all Missed, Received or Placed Calls ..........10-157
To delete all Call History information ...................................................10-157
The Personal Directory ...............................................................................10-157
Accessing the Personal Directory and Entry Details ...............................10-158
Cursor Pad movement in the Personal Directory.................................10-158
To access the Personal Directory ........................................................10-158
To view a specific Personal Directory entry .........................................10-159
Presence Monitor Settings and the Personal Directory .......................10-159
Incoming Call Display and the Personal Directory...............................10-160
Searching for an Entry in the Personal Directory ....................................10-160
To search the Personal Directory ........................................................10-160
Dialing from the Personal Directory.........................................................10-160
To dial a number from the Personal Directory .....................................10-160
Adding or Editing a Personal Directory Entry ..........................................10-161
Duplicate Entries in the Personal Directory .........................................10-161
To add an entry to the Personal Directory ...........................................10-161
To edit a Personal Directory entry .......................................................10-164

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CONTENTS
DT820 Phone User Guide Contents vii
Deleting a Personal Directory Entry ........................................................10-168
To delete a Personal Directory entry ...................................................10-169
To remove Personal Directory entry information but keep
Speed Dial Key information .................................................................10-169
The Corporate Directory..............................................................................10-169
Viewing the Corporate Directory and Entry Details .................................10-169
To access the Corporate Directory ......................................................10-169
To dial a number from the Corporate Directory ...................................10-170
Presence Monitor Settings and the Corporate Directory .....................10-170
11 Phone Troubleshooting.......................................................11-173
Using the Help key ......................................................................................11-173
Basic Troubleshooting.................................................................................11-174
To check common problems................................................................11-174
Network Connections ..................................................................................11-175
My phone cannot register on the network............................................11-175
My phone cannot reconnect to the network after a
local settings change ...........................................................................11-175
I cannot connect to the network through the PC port
on the back of the phone .....................................................................11-175
My device connected to the PC Port lost its network connection ........11-176
Power ..........................................................................................................11-176
The phone does not power up .............................................................11-176
Calling .........................................................................................................11-176
The phone does not have a dial tone...................................................11-176
The phone cannot make any calls .......................................................11-177
The phone cannot make any external calls .........................................11-177
A Speed Dial/Personal Directory entry is not working correctly...........11-178
Telephone numbers from the Personal Directory or
Call History are not dialing correctly ....................................................11-178
The phone does not ring ......................................................................11-178
I cannot reconnect to a call on Hold/The call does not terminate ........11-179
Phone Keypad.............................................................................................11-179
The dial pad and/or buttons are not working........................................11-179
I want to enter specific characters or letters in Speed Dials
and Personal Directory Entries ............................................................11-179
Phone Softkeys ...........................................................................................11-180
The phone softkeys are not working ....................................................11-180
I cannot see a particular softkey on my phone ....................................11-180
LCD Screen/Display....................................................................................11-181
The LCD is too light or dark .................................................................11-181
I want to adjust the time the LCD stays lit............................................11-181
I need to reset the language on my phone ..........................................11-181
The Call History information on my phone is gone ..............................11-181
The name shown on the LCD of my phone is wrong ...........................11-182
Audio ...........................................................................................................11-182
There is no audio to my handset..........................................................11-182
There is no audio to my headset..........................................................11-182
Audio quality ........................................................................................11-182

CONTENTS
viii Contents DT820 Phone User Guide
A 3C System Features.............................................................. A-183
Call Pickup................................................................................................ A-184
To pick up a call .................................................................................... A-184
3C Voice Mail ........................................................................................... A-184
To access voicemail.............................................................................. A-184
3C System Telephone Set Star Code Commands ................................... A-185
.................................................................................................................. A-188
B SIP@Net System Features ...................................................B-189
Programmable Keys / Speed Dial keys .................................................... B-189
Example ................................................................................................ B-189
SIP@Net Prefixes..................................................................................... B-190
Message Waiting Indication...................................................................... B-190
Desk Sharing and User Portability............................................................ B-190
To log on to a Desk Sharing Terminal .................................................. B-190
To log out of a Desk Sharing Terminal ................................................. B-190
C EHS Bluetooth® Headset Support ......................................C-193
Supported Headsets .................................................................................... C-193
Electronic Hook Switch Headset .................................................................. C-194
Supported Features.................................................................................. C-194
Setup and Installation ............................................................................... C-194
Headset Base Station Setup................................................................. C-194
Enable the Headset port one the phone ............................................... C-194
Enable EHS headset at the phoneset device ....................................... C-194
Connect Phone to Headset Base Station ............................................. C-195
To set external headset ringing (Optional)............................................ C-195
Headset Troubleshooting ......................................................................... C-195
D Notices................................................................................... D-197
Third Party Software Disclaimer and Limitations ......................................... D-197
Open Source License Acknowledgment................................................... D-197
OpenSSL Redistribution Conditions ..................................................... D-197
libSRTP Redistribution Conditions........................................................ D-198
NetBSD Foundation's (TNF) License.................................................... D-199
BSD license: ......................................................................................... D-199
Audio Coding Licenses............................................................................. D-200
Notice to the user ......................................................................................... D-200
Important safety information......................................................................... D-200
Use of an external AC adapter..................................................................... D-201
Use of an IEEE802.3af power supply .......................................................... D-201
Power Consumption..................................................................................... D-201
Declaration of Conformity............................................................................. D-201
WEEE Product Disposal Information ........................................................... D-205

DT820 Phone User Guide List of Tables ix
Contents
. . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LIST OF TABLES
ITY-8LDX (DT820 Series) Keys and Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
ITY-8LDX (DT820 Series) Keys and Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
ITY-6D-1 (DT820 Series) Keys and Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11
Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12
Secured/Unsecure Signaling and Media Scenarios Icons . . . . . . . . . . . . . . .2-15
Volume Display Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-15
Monitor Presence Icons for ITY-8LD phones . . . . . . . . . . . . . . . . . . . . . . . . .2-20
Programmable Key information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-21
Page Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-22
Monitor Presence LED Colors for Speed Dial Keys . . . . . . . . . . . . . . . . . . . .2-23
Date Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-38
Clear Confirmation softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-40
Data Clear Confirmation acceptable user actions/keys . . . . . . . . . . . . . . . . .4-41
Clear Confirmation softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-41
Data Clear Confirmation acceptable user actions/keys . . . . . . . . . . . . . . . . .4-41
Clear Confirmation softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-42
Data Clear Confirmation acceptable user actions/keys . . . . . . . . . . . . . . . . .4-42
Uppercase Alphabetic Character Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-44
Lowercase Alphabetic Character Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-46
Numeric Character Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-47
Character entry mode Icon Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-47
Secure Registration Icon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-50
Secure Media Icon (Secure Media, Unsecure Signaling) . . . . . . . . . . . . . . . .5-50
Secured/Unsecure Signaling and Media Scenarios Icons . . . . . . . . . . . . . . .5-50
TLS Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-52
Monitor Presence Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-68
Monitor Presence Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-71
Monitor Presence Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-73
Monitor Presence LED Colors for Speed Dial Keys . . . . . . . . . . . . . . . . . . . .7-73
Monitor Presence Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-75
Monitor Presence LED Colors for Speed Dial Keys . . . . . . . . . . . . . . . . . . . .7-76
Monitor Presence Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-82
Monitor Presence LED Colors for Speed Dial Keys . . . . . . . . . . . . . . . . . . . .7-83
Supported search characters: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-105
Call recording indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-112
Trunk Presence LEDs and Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-113
DND LEDs and Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-114
Handset Forwarding LEDs and Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-115
Supported search characters: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-135
Enhanced Programmable Keys Support. . . . . . . . . . . . . . . . . . . . . . . . . . . .9-139
Call recording indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-144
Trunk Presence LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-146
DND LEDs and Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-147
Handset Forwarding LEDs and Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-148

LIST OF TABLES
xList of Tables DT820 Phone User Guide
Monitor Presence Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-155
Monitor Presence LED Colors for Speed Dial Keys . . . . . . . . . . . . . . . . . .10-156
Monitor Presence Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-159
Monitor Presence Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-163
Monitor Presence LED Colors for Speed Dial Keys . . . . . . . . . . . . . . . . . .10-163
Monitor Presence Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-167
Monitor Presence LED Colors for Speed Dial Keys . . . . . . . . . . . . . . . . . .10-167
Monitor Presence Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-170
Character entry mode Icon Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-180
Commonly used terms in the UNIVERGE 3C documentation: . . . . . . . . . . A-183
System Star Code Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-185
DT820 Minimum/Maximum Power Consumption by available options . . . . D-201

DT820 Phone User Guide List of Figures 1
Contents
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LIST OF FIGURES
ITY-8LCGX (DT820C Series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
ITY-8LDX (DT820 Series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
ITY-6D-1 (DT820 Series) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-10
Use Menus and Cursor Pad to access the Personal Directory . . . . . . . . . . . .2-17
Use Cursor Pad to access Personal Directory . . . . . . . . . . . . . . . . . . . . . . . .2-17
Scroll key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19
ITY-8LD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-20
Page Scrolling Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-22
ITY-8LDX Speed Dial Key Numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-23
DT820 (ITY-6D-1) Speed Dial Key Numbering . . . . . . . . . . . . . . . . . . . . . . . .2-25
Tilt Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-27
Leg stoppers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28
Adjust tilt leg (High) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-28
Leg stoppers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-29
Adjust tilt leg (Low) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-29
Handset Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30
Phone/LAN Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-30
Headset Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31
LAN Cable Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-31
Cursor Pad Up/Down Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-33
Secure Media Icon (Secure Media, Secure Signaling) . . . . . . . . . . . . . . . . . .5-50
Softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-53
Redial from Cursor Pad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-56
Softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-63
Feature Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-117
Transfer Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-142
Transfer Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-143
Softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-149
Directory Key on the Cursor Pad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-151
Registered Phone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-174
Unregistered Phone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-174
Network Cable Unplugged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-174
Unregistered Phone icon. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-175
Registered Phone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-176
Unregistered Phone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-176

LIST OF FIGURES
2List of Figures DT820 Phone User Guide