Product Guide - KX-TGM420W
How to add a name and telephone number to the Phonebook.
The Phonebook feature allows you to store names and phone numbers in the telephone for quick access. This answer will show you how to store to the Phonebook.
How to adjust the telephone ringer volume or turn it on or off.
Learn how to adjust the volume of the ringer higher, lower or turn off.
How to register / deregister a telephone handset.
The supplied handset and base unit are preregistered. If for some reason the handset is not registered to the base unit, or if you purchase an additional handset, this answer will show you how to register the handset.
How to remove / unblock a number from the blocked calls list.
Follow the instructions to learn how to unblock/remove a number that you no longer want blocked.
How to set the telephone's answering machine ring count.
This answer will provide you with the most common set up features for an answering machine, including remote access, how to turn on, how to listen to messages.
How to set up the telephone's date and time.
The Date and time is automatically displayed by signals that it receives from your telephone provider. However if for some reason it is incorrect you can manually set the date and time.
How to set up the telephone's speed dial feature.
Speed dial is that allows you to place a call by pressing a reduced number of keys. This answer will show you how to store speed dial numbers.
How to use the Call block feature.
Learn how to block numbers that you do not want to ring on your telephone. Useful for telemarketers.
How to use the telephone answering machine.
This answer will provide you with the most common set up features for an answering machine, including remote access, how to turn on, how to listen to messages...
What is Voicemail service and how to use with a telephone with an answering machine.
Voicemail Is a service offered by your telephone provider. Messages are stored in their system and accessed remotely. After you subscribe to this service, your phone service provider’s voice mail system answers calls for you when you are unavailable to answer. You need to make sure your telephone is set correctly for this service.
How to find the model number or serial number of a product
Use this tool to easily locate the model number or serial number of your Panasonic product. Whether you're looking for warranty information, replacement parts, or product support, this guide provides step-by-step instructions to find the necessary details for your specific device.
Troubleshooting - Answering machine does not operate correctly
In this answer we will walk you through the answering machine connections and provide information on answering machine set up depending on your usage.
Troubleshooting - Error Messages on a telephone display. ex Line in Use, No link, Base no power
This answer will provide you with a list on messages that may display on a telephone, what they mean and what to do when the message is displayed.
Troubleshooting - Error message "Check tel line"
This answer will show you troubleshooting steps to perform when "Check tel line" is displayed on the handset.
Troubleshooting - Handset power related problems, handset is not charging, battery icon flashes, the unit does not work.
This answer will look at possible cause and solutions for handset power related problems, handset is not charging, battery icon flashes or the unit does not work.
Troubleshooting - No dial tone.
This answer will supply you will possible cause and solution if you are not getting a dial tone.
Troubleshooting - The handset displays "New Voice Mail." or “Voice mail msg. via phone co." or "Voicemail" or shows a Voicemail icon. How to clear it.
When a Voicemail message is recorded a notification is displayed. Normally this notification is automatically cleared after you listen to the message. If it does not clear follow the steps in this answer to clear.
Troubleshooting - The handset or base unit does not ring.
This answer will show you troubleshooting steps to perform when the handset or base unit does not ring.
Cordless Telephone Handset Compatibility Guide: Find Compatible Handsets for Your Model and Where to Purchase
Looking to add additional handsets to your system? Use this guide to find handsets compatible to your model.
Register a product Purchased in the United States.
Register your Panasonic, Technics and LUMIX products through our official registration portal. Enjoy exclusive benefits, warranty tracking, and access to product updates tailored to your registered devices.
How to add a name and telephone number to the Phonebook.
The Phonebook feature allows you to store names and phone numbers in the telephone for quick access. This answer will show you how to store to the Phonebook.
How to adjust the telephone ringer volume or turn it on or off.
Learn how to adjust the volume of the ringer higher, lower or turn off.
How to register / deregister a telephone handset.
The supplied handset and base unit are preregistered. If for some reason the handset is not registered to the base unit, or if you purchase an additional handset, this answer will show you how to register the handset.
How to remove / unblock a number from the blocked calls list.
Follow the instructions to learn how to unblock/remove a number that you no longer want blocked.
How to set the telephone's answering machine ring count.
This answer will provide you with the most common set up features for an answering machine, including remote access, how to turn on, how to listen to messages.
How to set up the telephone's date and time.
The Date and time is automatically displayed by signals that it receives from your telephone provider. However if for some reason it is incorrect you can manually set the date and time.
How to set up the telephone's speed dial feature.
Speed dial is that allows you to place a call by pressing a reduced number of keys. This answer will show you how to store speed dial numbers.
How to use the Call block feature.
Learn how to block numbers that you do not want to ring on your telephone. Useful for telemarketers.
How to use the telephone answering machine.
This answer will provide you with the most common set up features for an answering machine, including remote access, how to turn on, how to listen to messages...
What is Voicemail service and how to use with a telephone with an answering machine.
Voicemail Is a service offered by your telephone provider. Messages are stored in their system and accessed remotely. After you subscribe to this service, your phone service provider’s voice mail system answers calls for you when you are unavailable to answer. You need to make sure your telephone is set correctly for this service.
How to find the model number or serial number of a product
Use this tool to easily locate the model number or serial number of your Panasonic product. Whether you're looking for warranty information, replacement parts, or product support, this guide provides step-by-step instructions to find the necessary details for your specific device.
Troubleshooting - Answering machine does not operate correctly
In this answer we will walk you through the answering machine connections and provide information on answering machine set up depending on your usage.
Troubleshooting - Error Messages on a telephone display. ex Line in Use, No link, Base no power
This answer will provide you with a list on messages that may display on a telephone, what they mean and what to do when the message is displayed.
Troubleshooting - Error message "Check tel line"
This answer will show you troubleshooting steps to perform when "Check tel line" is displayed on the handset.
Troubleshooting - Handset power related problems, handset is not charging, battery icon flashes, the unit does not work.
This answer will look at possible cause and solutions for handset power related problems, handset is not charging, battery icon flashes or the unit does not work.
Troubleshooting - No dial tone.
This answer will supply you will possible cause and solution if you are not getting a dial tone.
Troubleshooting - The handset displays "New Voice Mail." or “Voice mail msg. via phone co." or "Voicemail" or shows a Voicemail icon. How to clear it.
When a Voicemail message is recorded a notification is displayed. Normally this notification is automatically cleared after you listen to the message. If it does not clear follow the steps in this answer to clear.
Troubleshooting - The handset or base unit does not ring.
This answer will show you troubleshooting steps to perform when the handset or base unit does not ring.
Cordless Telephone Handset Compatibility Guide: Find Compatible Handsets for Your Model and Where to Purchase
Looking to add additional handsets to your system? Use this guide to find handsets compatible to your model.
Register a product Purchased in the United States.
Register your Panasonic, Technics and LUMIX products through our official registration portal. Enjoy exclusive benefits, warranty tracking, and access to product updates tailored to your registered devices.