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Mrs. Lori AyersSep 2, 2025
Why is my AudioCodes 420HD not ringing?
- KKelsey PooleSep 2, 2025
If your AudioCodes IP Phone is not ringing, the ring volume might be set too low. Increase the volume using the phone's settings (see Section 4.9.1).
Why is my AudioCodes 420HD not ringing?
If your AudioCodes IP Phone is not ringing, the ring volume might be set too low. Increase the volume using the phone's settings (see Section 4.9.1).
What to do if AudioCodes IP Phone displays 'LAN Link Failure'?
If your AudioCodes IP Phone displays a 'LAN Link Failure' message, it indicates there is no LAN connection. Here’s how to troubleshoot: * Verify that the LAN cable is securely connected to the LAN port on the rear of the phone. * Ensure the other end of the LAN cable is connected to the network switch. If it is not, inform your system administrator.
How to fix AudioCodes IP Phone when it is off (no LCD or LEDs)?
If your AudioCodes IP Phone is off, with no LCD display or LEDs, the phone is likely not receiving power. Here’s what you can check: * Ensure the AC/DC power adapter is firmly attached to the DC input on the rear of the phone. * Confirm the AC/DC power adapter is plugged into a functional electrical outlet. * If you're using Power over Ethernet (PoE), contact your system administrator to verify the switch is providing power to the phone.
What to do if my AudioCodes 420HD displays 'Registration...' and I cannot make calls?
If your AudioCodes IP Phone displays a 'Registration…' message on the LCD, and you cannot make or receive calls, it means the line is not registered to the network. If your phone supports multiple lines, an 'X' displayed on the LCD indicates a line registration failure. Contact your system administrator for assistance.
What to do if AudioCodes 420HD IP Phone says 'PIN not set'?
If your AudioCodes IP Phone displays 'PIN not set', verify in the Lync server interface that a PIN was configured for the user account. If a PIN hasn't been set, create one for the account.
How to fix 'Location look-up failed' on AudioCodes IP Phone?
If your AudioCodes IP Phone displays 'Location look-up failed. Please enter your address.', ensure that 'Location look up' is configured by the management shell in the Lync server.
How to resolve 'Failed to connect server' on AudioCodes IP Phone?
If your AudioCodes IP Phone displays 'Failed to connect server' or 'Cannot find Lync server at ' and cannot perform registration, ensure at least one of the following is enabled in the DNS server: _sipinternaltls._tcp. (for TLS), DHCP results (Option 120) (for TLS), _sipinternal._tcp. (for TCP), DHCP results (Option 120) (for TCP), _sip._tls. (for TLS), or _sip._tcp. (for TCP).
How to fix 'Failed to validate certificate' on AudioCodes 420HD IP Phone?
If your AudioCodes IP Phone displays 'Failed to validate certificate' or 'Failed to obtain user certificate', ensure DHCP Option 43, sub-option 5, is enabled on your DHCP server. Also, verify access to the Lync Web service URL: https://lyncsvrWebPoolFQDN:443/CertProv/CertProvisioningService.svc. Finally, ensure the LDAP server (_ldap._tcp.) is enabled to obtain the root certificate.
What to do if AudioCodes 420HD shows 'PIN account disabled'?
If your AudioCodes IP Phone displays 'PIN account disabled', verify that the account is enabled in the Lync server interface. If it is not enabled, enable it.
How to resolve 'Duplicate IP' error on AudioCodes 420HD?
If your AudioCodes IP Phone displays 'Duplicate IP', delete the duplicate IP address in the DHCP server and request a new one.
General| Brand | AudioCodes |
|---|---|
| Model | 420HD |
| Category | IP Phone |
| Language | English |
Overview of AudioCodes' HD IP Phone series for enhanced voice quality.
Details on advanced voice technology, wideband coders, and audio enhancements.
Guide to unpacking phone components and checking for presence and damage.
Introduction to the phone's hardware features and components.
Description of the front panel layout and its components.
Description of the rear panel ports and connections.
Instructions for connecting cables to the phone for network and power.
Options for mounting the phone on a desk or wall.
Step-by-step guide for placing the phone on a desk or flat surface.
Instructions on how to route the handset cable for neatness.
Step-by-step guide for mounting the phone securely on a wall.
Familiarization with the phone's LCD display in idle state.
Explanation of various softkey functions available on the phone's LCD.
Guide to navigating the phone's menu structure for configuration and information.
List of messages displayed on the LCD during phone processes.
How to switch input modes on the keypad for entering characters and symbols.
Instructions on how to sign out of the phone session.
Method to sign out using the Web interface when the softkey is unavailable.
How to change the display language on the phone's LCD.
How to choose and set a ring tone for incoming calls.
How to enable or disable the call waiting feature.
How the phone displays and handles multiple incoming calls.
Setting the phone to reject calls when busy.
How to automatically redirect incoming calls to another number or voicemail.
Configuring date, time, and time zone settings, often via NTP.
Adjusting the contrast of the phone's LCD screen for better visibility.
Setting the duration the phone's backlight remains on when idle.
Choosing between speaker or headset for call activation.
Setting or displaying geographical location information for calling parties.
Configuring the outbound proxy for hosted Lync environments.
Adjusting volume levels for various audio outputs like ring, tones, handset.
How to adjust the volume of the incoming call ring.
How to adjust the volume for dial tones and call progress tones.
Adjusting the volume for the handset during calls.
Adjusting the volume for the speakerphone during calls.
Adjusting the volume for a connected headset during calls.
Adding, editing, and managing contacts in the personal directory.
How to access the phone's contact directories.
Step-by-step guide to adding new contacts to the personal directory.
How to modify existing contact details in the personal directory.
How to remove contacts from the personal directory.
Methods for quickly locating contacts within the directory.
Using T9 predictive text for searching corporate contacts.
Switching between T9 and standard input modes for directory search.
Setting up phone keys for quick dialing of contacts.
Step-by-step process to assign a speed dial key to a contact.
How to modify existing speed dial entries.
How to remove assigned speed dial entries.
Configuring phone keys for group paging functionality.
Setting and managing your availability status visible to others.
Instructions on using the handset, speaker, and headset for calls.
Various methods for initiating phone calls.
How to dial regular numbers and URLs.
How to redial previously dialed numbers.
How to dial a number from the list of missed calls.
Procedures for answering incoming calls using different devices.
How to decline an incoming call.
How to mute the ringing of an incoming call.
Methods for terminating an active call.
Accessing call logs for missed, received, and dialed calls.
How to handle and switch between multiple incoming calls.
How to put an active call on hold and retrieve it.
How to initiate a call to a contact stored in the directory.
How to use pre-configured speed dial keys to make calls.
Procedures for transferring calls to other parties.
How to perform a transfer after speaking with the recipient.
Performing consultative transfers using only softkeys.
How to perform a transfer without speaking to the recipient first.
How to place a call in a parking lot for later retrieval.
Setting up group call pickup to answer calls for other users.
How to set up and manage conference calls with multiple participants.
How to mute the microphone during calls.
Functionality for broadcasting audio messages to a group.
How to initiate paging calls to a group.
How to receive and respond to paging calls.
Integrating the IP phone with Skype for Windows client via BTOE.
Step-by-step guide to installing the BTOE software on a PC.
Verifying the successful installation of the BTOE application.
How to configure the TCP port for BTOE communication.
Process of pairing the BTOE PC application with the IP phone.
How to generate a unique pair code for device connection.
Steps to connect the IP phone and PC application using the pair code.
Linking the Skype for Windows client to the IP phone via login.
Verifying the successful pairing between the IP phone and Skype client.
Checking if the Skype for Windows client is correctly paired with the phone.
Checking the phone's status to confirm pairing with the Skype client.
Utilizing BTOE features for enhanced unified communications.
Signing into the IP phone from the Skype for Windows PC client.
Making calls from the PC client or IP phone, with mirrored operations.
How to initiate and manage conference calls using BTOE.
Answering calls via the Skype client or IP phone for convenience.
Transferring calls from either the PC client or the IP phone.
How to access and listen to voice mail messages on the phone.
