Panasonic KX-TG3811SX

Questions and Answers

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Kyle SimmonsAug 8, 2025
What to do if I cannot hear a dial tone on my Panasonic Cordless Telephone?
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  Tammy HendrixAug 9, 2025
  If you cannot hear a dial tone on your Panasonic Cordless Telephone, first check if the AC adaptor or telephone line cord of the base unit is properly connected. If the connections are correct, disconnect the base unit from the telephone line and connect the line to a known working telephone. If the working telephone operates correctly, contact service personnel to repair the unit. If the working telephone does not operate properly, contact your service provider/telephone company.
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brandonjohnsonAug 14, 2025
Why my Panasonic KX-TG3811SX unit does not work?
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  Melissa MullenAug 15, 2025
  If your Panasonic Cordless Telephone unit isn't working, ensure the batteries are correctly installed and fully charged. Check all connections. Try resetting the unit by unplugging the base unit’s AC adaptor, then reconnecting it. Also, verify the handset is registered to the base unit.
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Thomas NealAug 20, 2025
What to do if I cannot make a call on my Panasonic KX-TG3811SX Cordless Telephone?
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  brandi36Aug 20, 2025
  If you cannot make a call on your Panasonic Cordless Telephone, check the dialing mode setting. Also, ensure the handset is close enough to the base unit. If another unit or the answering system is in use, wait and try again. Lastly, check if dial lock is turned on.
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Gabriel BellAug 26, 2025
What to do if I cannot operate the answering system remotely on Panasonic Cordless Telephone?
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  Nichole ToddAug 26, 2025
  If you cannot operate the answering system remotely on your Panasonic Cordless Telephone, ensure the remote access code is set. Verify that you are entering the correct remote access code, pressing each key firmly. Also, confirm that the answering system is turned on.
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Sherry MartinSep 2, 2025
What to do if liquid entered my Panasonic KX-TG3811SX Cordless Telephone?
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  Lee BarnettSep 2, 2025
  If liquid or moisture has entered your Panasonic Cordless Telephone handset/base unit, disconnect the AC adaptor and telephone line cord from the base unit. Remove the batteries from the handset and allow it to dry for at least 3 days. Once completely dry, reconnect the AC adaptor and telephone line cord, reinsert the batteries, and charge fully before use. If it still doesn't work, contact an authorized service center.

Summary

Important Product Information

General Safety Precautions

Details crucial safety warnings and precautions for product usage, power, installation, and medical considerations.

Battery Safety and Handling Guidelines

Provides essential safety guidelines and handling instructions for the rechargeable batteries.

Technical Product Specifications

Getting Started Guide

System Component Connections

Guides users on how to properly connect the base unit to the telephone line and AC power, including DSL filter usage.

Base Unit Setup and Battery Charging Procedures

Details the setup for the base unit and the process for charging the handset batteries.

Setup Notes and Battery Performance Details

Handset Controls and Features Overview

3800 Series Handset Controls Overview

Base Unit Controls Overview

Initial Settings Configuration Guide

Date and Time Configuration

Making and Answering Calls Guide

Handset and Speakerphone Call Procedures

Details how to make calls using the handset and the speakerphone, including volume adjustment.

Answering Calls and Ringer Settings

Covers how to answer incoming calls, adjust ringer volume, and turn off the ringer temporarily.

Call Management: Hold, Mute, Flash

Details how to use the Hold, Mute, and Flash features during a conversation.

Call Waiting and Caller ID Service Usage

Advanced Call Features

Dial Lock Feature Operation

Dial Lock Operation and Security

Power Failure Operation and Calling

Explains how the unit operates during a power failure and how to make calls using the power back-up mode.

Making Calls During Power Outages

Details how to make and answer calls using the handset during a power failure situation.

Phonebook Management

Phonebook Entry Management

Guides users on adding new entries to the phonebook, including storing emergency numbers and character input.

Phonebook Search and Call

Phonebook Search, Edit, and Erase

Phonebook Copying Between Handsets

Programming Unit Settings

Accessing Programmable Settings

Customizing Unit Settings Options

Ringer Volume and Tone Configuration

Initial Setup and Display Configuration Options

Line Setup and Privacy Settings

Alarm and Night Mode Settings

Instructions for setting up the alarm feature and configuring night mode to avoid disturbances.

Handset Naming and Call Barring Features

Caller ID Service Guide

Caller ID Service and Missed Call Handling

Explains how to use the Caller ID service, view missed calls, and understand phonebook name display.

Caller List Access and Calling

Caller List Management: Area Codes and Editing Numbers

Saving Caller Information to Phonebook

Answering System Operation

Answering System Operation and Call Screening

Covers turning the answering system on/off and utilizing the call screening feature to listen to callers.

Greeting Message Management and Playback

Listening to Messages via Base Unit

Guides users on how to listen to recorded messages using the base unit, including playback controls.

Listening to Messages via Handset

Explains how to listen to new and all messages using the handset, including call back and editing options.

Remote Operation and Access Code Setup

Details how to operate the answering system remotely using a touch-tone phone and setting up a remote access code.

Answering System Configuration: Rings and Recording Time

Explains how to configure the number of rings before answering and set the caller's recording time, including "Greeting Only" mode.

Intercom and Locator Features

Intercom Call Procedures

Guides users on initiating and answering intercom calls between handsets or handset and base unit.

Handset Locator Function

Call Transfer and Conference Call Procedures

Details how to transfer outside calls and establish conference calls with other parties.

Useful Product Information

Base Unit Wall Mounting Instructions

Character Entry Methods and Tables

Troubleshooting: Common Error Messages

Lists common error messages displayed by the unit and their corresponding solutions for troubleshooting.

Troubleshooting: General Use Problems

Addresses common issues related to general unit operation, such as handset not turning on or no dial tone.

Troubleshooting: Settings Issues

Troubleshooting: Battery and Call Problems

Covers issues related to battery recharge, noise during calls, intercom problems, and inability to make calls.

Troubleshooting: Caller ID and Answering System Issues

Addresses problems related to Caller ID display, phonebook name display, and the answering system's recording or greeting functions.

Troubleshooting: Remote Operation and Dial Lock Issues

Handset Registration and Deregistration Procedures

Panasonic KX-TG3811SX Specifications

General

Type	Cordless Telephone
Number of Handsets	1
Caller ID	Yes
Phonebook Capacity	50 entries
Talk Time	Up to 10 hours
Display	LCD
Frequency	1.9 GHz
Speakerphone	Yes
Answering Machine	No
Wall Mountable	Yes
Call Waiting	Yes
Handset Speakerphone	Yes
Intercom	No
Expandable up to	6 handsets
Color	Silver
Range	Up to 300 meters outdoors, 50 meters indoors