CL4940 - Big button/big display telephone/ answering system with caller ID/ call waiting

Nov 4, 2026

User’s manual for AT&T model CL4940, a big button, big display telephone with caller ID and call waiting. Provides pre-use guidance and directs readers to important safety information in the manual. Covers setup and installation options including tabletop and wall mount installation, core telephone settings such as date/time, ringer volume, language, LCD contrast, and dial mode, plus power-failure calling and answering procedures. Includes operating instructions for calls, equalizer, audio assist, directory functions, caller ID history, and answering system settings and controls.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages67

Reading Time2 h 49 min

AccessFree to download

Getting started

Quick reference guide

Installation

Telephone installation

Installation options

Tabletop to wall mount installation

Wall mount to tabletop installation

Telephone settings

Set date/time

Ringer volume

Language

LCD contrast

Dial mode

Telephone operation

Line power mode (no AC power)

Making a call

On hook dialing (predialing)

Answering a call

Switching between handset and speakerphone

Ending a call

Last number redial

Equalizer

Options while on calls

Volume control

Call waiting

Mute

Chain dialing

Audio Assist®

Temporary tone dialing

Directory

Directory memory capacity

Character chart

Create a new directory entry

Review directory entries

Search by name

Display dial

Delete a directory entry

Edit a directory entry

Speed dial

Enter a speed dial number

Assign a speed dial number from the directory or caller ID log

Delete a speed dial number

Review a speed dial number

Dial a speed dial number

Caller ID

About caller ID

Information about caller ID with call waiting

Caller ID history

How the caller ID history (caller ID log) works

Missed (new) call indicator

Caller ID operation

Memory match

Review the caller ID history

View dialing options

Dial a caller ID log entry

Delete caller ID log entries

Save a caller ID log entry to the directory

Set area code

Reasons for missing caller ID information

Answering system

Answering system settings

Announcement

To turn on or off the answering system

Number of rings

Call screening

Message alert

Remote code

Priority code

User’s manual CL4940 Big button/big display telephone/ answering system with caller ID/ call waiting Congratulations on your purchase of this AT&T product. Before using this AT&T product, please read the Important safety information section on page 52 of this manual. Please thoroughly read this user’s manual for all the feature operations and troubleshooting information necessary to install and operate your new AT&T product. You can also visit our website at [www.telephones.att.com](www.telephones.att.com) or call 1 (800) 222-3111. In Canada, dial 1 (866) 288-4268. Model number: CL4940 Type: Big button/big display telephone/ answering system with caller ID/ call waiting Serial number: Purchase date: Place of purchase: Both the model and serial numbers of your AT&T product can be found on the bottom of the telephone base. Save your sales receipt and original packaging in case it is necessary to return your telephone for warranty service. | Compatible with Hearing Aid T-Coil | | --- | | | | TIA-1083 | Telephones identified with this logo have reduced noise and interference when used with most T-coil equipped hearing aids and cochlear implants. The TIA-1083 Compliant Logo is a trademark of the Telecommunications Industry Association. Used under license. © 2011 Advanced American Telephones. All Rights Reserved. AT&T and the AT&T logo are trademarks of AT&T Intellectual Property licensed to Advanced American Telephones, San Antonio, TX 78219. Printed in China. Parts checklist Your telephone package contains the following items. Save your sales receipt and original packaging in the event warranty service is necessary. Telephone base Handset Wall mount bracket Coiled handset cord Power adapter Telephone line cord User’s manual Quick start guide User’s manual CL4940 Big button/big display telephone/ answering system with caller ID/ call waiting Table of contents Getting started Quick reference guide ........................... 1 Installation ................................................... 3 Telephone installation ........................... 4 Installation options.................................. 6 Tabletop to wall mount installation ........................................ 6 Wall mount to tabletop installation ........................................ 8 Telephone settings Telephone settings................................10 Set date/time .....................................10 Ringer volume ....................................11 Language ..............................................11 LCD contrast........................................12 Dial mode .............................................12 Telephone operation Line power mode (no AC power) ...13 To make a call during a power failure ................................................13 To answer a call during a power failure ................................................13 Telephone operation ............................14 Making a call.......................................14 On hook dialing (predialing)........14 Answering a call................................14 Switching between handset and speakerphone ...............................14 Ending a call........................................14 Last number redial ...........................15 Equalizer................................................15 Options while on calls.........................16 Volume control ..................................16 Call waiting ..........................................16 Mute.........................................................16 Chain dialing .......................................17 Audio Assist® .......................................18 Temporary tone dialing .................18 Directory Directory .....................................................19 Directory memory capacity..........19 Character chart..................................19 Create a new di

FAQs

How do I find the model and serial numbers for the CL4940?

The model and serial numbers are on the bottom of the telephone base.

What installation options are supported for the CL4940?

The manual lists installation options for tabletop and wall mount configurations, including tabletop to wall mount installation and wall mount to tabletop installation.

Which settings can I configure on the CL4940?

You can set date/time, ringer volume, language, LCD contrast, and dial mode under Telephone settings.

Nov 4, 2026

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