Why does my NEC DT820 Telephone not ring?
If your NEC Telephone isn't ringing, first, try turning up the ringer volume. Also, check to ensure the phone isn't set to ring only through a headset.
How to reset the language on my NEC DT820?
To reset the language on your NEC Telephone, press the Menu key, select '3 User Settings', then '4 Language'. Choose the desired language and press Enter on the cursor pad or the OK softkey to confirm the setting.
What to do if my NEC DT820 does not have a dial tone?
If your NEC Telephone lacks a dial tone, try restarting it. Press the Menu key, select '5 Reboot', and then press the OK softkey or the Enter key on the cursor pad to reboot the phone.
How to fix the LCD if it's too light or dark on my NEC DT820?
To adjust the LCD contrast on your NEC Telephone, press the Menu key and select '3 User Settings', then '6 LCD Settings', and finally '1 LCD Contrast'. Use the softkeys to adjust the LCD contrast to your preference.
What to do if my NEC Telephone cannot make any calls?
If your NEC Telephone cannot make calls, press the Menu key, go to '6 Status', then '2 Network Information', and check that the phone has an IP address, Subnet Mask, Default Gateway, and DNS Server listed.
What to do if dial pad and buttons are not working on my NEC Telephone?
If the dial pad or buttons on your NEC Telephone aren't working, try restarting the phone. Press the Menu key and select '5 Reboot'.
What to do if I cannot see a softkey on my NEC Telephone?
If you cannot see a particular softkey on your NEC Telephone, and the 'More' softkey is visible on the LCD, press it to reveal additional softkeys for your screen.
What to do if a Speed Dial entry is not working on my NEC DT820?
If a Speed Dial or Personal Directory entry isn't working correctly on your NEC Telephone, verify that you have the outside calling code programmed at the beginning of the number and that your account is authorized to make external calls.
What to do if there is no audio to my handset on NEC DT820?
If there is no audio to your handset on the NEC Telephone, verify that the handset is firmly plugged into the HANDSET jack on the back of the telephone.
What to do if there is no audio to my headset on NEC Telephone?
If there is no audio to your headset on the NEC Telephone, verify that the headset is firmly plugged into the HEADSET jack on the back of the telephone.
General| Display | LCD |
|---|---|
| Number of Programmable Keys | Up to 24 |
| Speakerphone | Yes |
| Headset Port | Yes |
| Handsfree | Yes |
| Wall Mountable | Yes |
| Speed Dial | Yes |
| Ring Tones | Multiple |
| Volume Control | Yes |
| Type | Digital Phone |
| Compatibility | NEC SV9100, SV8100, and SV8300 phone systems |
Details the supported phone models in the DT lineup.
Provides an overview of the DT820 series phones.
Explains compatibility with different communication server platforms.
Lists the different models in the NEC DT820 series IP phone lineup.
Identifies and describes the physical keys and parts of the phone.
Details the support for Gigabit Ethernet on DT820 phones.
Covers specific features and details for the ITY-8LDX model.
Explains the display of programmable key information on the ITY-8LD phone.
Describes how to use the scroll key to navigate programmable key pages.
Explains the numbering scheme for Speed Dial keys on ITY-8LDX phones.
Details how presence monitor settings affect Speed Dial keys.
Covers specific features and details for the ITY-6D-1 model.
Explains the numbering scheme for Speed Dial keys on ITY-6D-1 phones.
Important steps and considerations before starting the installation.
Instructions on how to adjust the tilt leg for optimal viewing angle.
Steps for physically connecting the phone components.
How to configure settings using the cursor pad.
Configuration using menus and the cursor pad.
Settings related to the DESI-less LCD display.
Options for clearing user settings and data.
Information on ensuring call security.
Details on secure signaling protocols.
Information on secure media transmission.
Troubleshooting common security errors.
Fundamental procedures for making and receiving calls.
Information on displaying call duration.
How to terminate an active call.
How to redial the last dialed number.
Procedures for putting calls on hold and resuming them.
How to use a headset for calls.
Managing incoming calls while on an active call.
How to configure and use programmable and speed dial keys.
Steps to configure speed dial keys.
Guidelines for handling duplicate entries in speed dials.
How to use the Feature key for programming.
How to use speed dial keys to initiate calls.
Procedures for originating calls using speed dial keys.
Illustrative examples of programming speed dial keys.
Guide to using the phone's microbrowser.
How the Feature key interacts with the microbrowser.
Features and operation of Hot Desking.
Setting up and managing handset call forwarding.
Functionality for recording calls.
How to monitor or barge calls.
Accessing system-wide call logs.
Viewing information about conference calls.
Searching system and corporate directories.
Advanced functions for programmable keys.
Details on Enhanced Busy Lamp Fields (BLFs).
How to utilize enhanced programmable key features.
Using BLF keys for workgroup functions.
Functionality of the Park Extension key.
How to use the Call Back key.
Functionality of the Monitor/Supervise key.
Guide to using the color microbrowser.
How the Feature key interacts with the color microbrowser.
Features and operation of Hot Desking with color microbrowser.
Setting up handset forwarding via color microbrowser.
Call recording features via color microbrowser.
Monitoring calls via color microbrowser.
Accessing system call logs via color microbrowser.
Viewing conference details via color microbrowser.
Searching directories via color microbrowser.
Advanced features for programmable keys.
Details on Enhanced BLFs.
Using BLF keys for workgroup functions.
Functionality of the Park Extension key.
How to use the Help key.
Functionality of the Menu key.
Viewing and managing call records.
Using star and PIN codes in placed calls.
How user portability affects call history.
Information about missed calls.
Procedures for dialing numbers from call history.
Adding call history data to the personal directory.
Rules for duplicate entries in the personal directory.
How to access and view personal directory entries.
Describes cursor pad navigation within the directory.
How presence settings integrate with the personal directory.
How incoming calls are displayed with personal directory info.
How to search the personal directory.
Procedures for dialing numbers from the personal directory.
Steps to add or modify personal directory entries.
Rules for duplicate directory entries.
Retaining Speed Dial info when deleting directory entry.
Information about the corporate directory.
How to access and view corporate directory entries.
How presence settings relate to the corporate directory.
How to use the Help key for troubleshooting.
General steps to diagnose and resolve phone problems.
Troubleshooting issues related to network connectivity.
Steps to resolve network registration failures.
Solutions for reconnection issues after local setting changes.
Troubleshooting PC port network connection problems.
Troubleshooting power-related issues.
Steps to take if the phone does not power on.
Troubleshooting call-related problems.
Steps to resolve no dial tone issues.
Troubleshooting general call placement failures.
Resolving issues with making external calls.
Troubleshooting issues with speed dial or directory entries.
Resolving incorrect dialing from directory or call history.
Troubleshooting why the phone is not ringing.
Resolving issues with reconnecting to held or active calls.
Troubleshooting keypad and button issues.
Steps to take when dial pad or buttons fail.
How to enter special characters in entries.
Troubleshooting softkey issues.
Steps to resolve non-functional softkeys.
Troubleshooting missing softkeys.
Troubleshooting issues with the LCD screen.
Adjusting LCD contrast for readability.
Configuring the LCD backlight timeout.
Resetting the phone's display language.
Troubleshooting lost call history data.
Correcting incorrect names displayed on the phone.
Troubleshooting audio problems.
Resolving issues with no audio in the handset.
Resolving issues with no audio in the headset.
Troubleshooting poor audio quality.
Explains product name usage and terminology within the manual.
Lists common terms and abbreviations used in 3C documentation.
How to pick up calls for other users in a pickup group.
Procedures for accessing the 3C voicemail system.
Lists star codes for controlling phone features and functions.
Setting automatic ring back notifications when idle.
Completing a blind transfer of a call.
Configuring the phone to send call detail information.
Deactivating active call forwarding settings.
Setting up call forwarding to specific numbers or extensions.
Blocking the display of caller ID information.
Canceling the call waiting feature.
Forwarding calls to another extension when the phone is busy.
Forwarding calls when the ringing call is not answered.
Setting up and managing conference calls.
Directing calls to a park zone for later retrieval.
Activating the Do Not Disturb feature.
Deactivating the Do Not Disturb feature.
Dropping the last active call.
Retrieving ringing calls within a predefined group pickup area.
Making intercom calls between phones.
Remotely logging out of a Hot Desking session.
Using the organization's paging system.
Parking calls into specific zones.
Retrieving ringing or held calls at an extension.
Transferring calls directly to another voice mailbox.
Retrieving calls from a park zone.
Configuring programmable and speed dial keys for SIP@Net.
Managing programmable key functions and monitoring their status.
An example of programming a DND function for SIP@Net.
SIP@Net specific prefixes for activating/deactivating features.
How message waiting is indicated in SIP@Net systems.
Managing desk sharing and user portability in SIP@Net.
Lists the headset models supported by EHS.
Details supported Plantronics headsets and required accessories.
Information on Electronic Hook Switch (EHS) headset functionality.
Lists the functions supported by EHS for DT820 terminals.
Steps for setting up and installing EHS headsets.
Steps to troubleshoot common headset issues.
Legal disclaimer for third-party software components.
Acknowledgment of open source licenses used in the firmware.
Details regarding the OpenSSL license agreement.
Conditions for redistributing OpenSSL software.
Information about the libSRTP library license.
Conditions for redistributing libSRTP software.
Information about the Gettext library.
Details of the NetBSD Foundation license.
Information regarding the XML parser implementation.
Details of the BSD license for the XML parser.
Important information and recommendations for the user.
Essential safety precautions for using the terminal.
Guidelines for the proper use of an external AC adapter.
Guidelines for using an IEEE802.3af compatible power source.
Information on the minimum and maximum power consumption.
Statement of product conformity with relevant directives.
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