Description
AT&T 4024 External Modem RS-232 Serial Dial-Up V.92 56K
The AT&T 4024 is a classic external dial-up modem designed for legacy computer systems and serial-connected devices. This unit provides 56K data transmission via the V.92 protocol, making it a reliable choice for older systems that require dial-up connectivity or for retrocomputing enthusiasts building vintage system setups.
Specifications & What's Included
- Brand: AT&T
- Model: 4024
- Type: External Desktop Dial-Up Modem
- Data Rate: 56 Kbps maximum (V.92 protocol)
- Supported Protocols: V.92, V.90, V.44 data compression, V.42bis
- Interface: RS-232 serial (DB-9 or DB-25 connector)
- Form Factor: External desktop unit
- Power: External AC adapter (not included with this unit)
- Included: Modem unit only
- Note: Compatible external power supply required for operation
Applications
The AT&T 4024 is a legacy external modem from the era when dial-up was the standard for personal computer connectivity. These units were widely used in home offices, small business setups, and institutional environments throughout the 1990s and early 2000s before broadband became dominant. Today, the 4024 is sought after by retrocomputing enthusiasts, vintage system collectors, and those maintaining legacy computer installations that still rely on dial-up or serial modem connectivity. External modems like this one remain valuable for historical computing projects, teaching the fundamentals of computer networking, and systems where dial-up remains the only available connectivity option. The RS-232 serial interface makes it compatible with older IBM PC compatibles, vintage laptops, and any computer with a serial port or USB-to-serial adapter.
This AT&T 4024 external modem has been inspected and appears to be in good used condition. It was pulled from a working environment and is ready for legacy system use or retrocomputing projects. Please note: the original power supply is not included with this unit — you will need to source a compatible external AC adapter. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
AT&T |
Model: |
4024 |
Type: |
External Dial-Up Modem |
Interface Type: |
RS-232 Serial (DB-9 or DB-25) |
Data Rate: |
56 Kbps (V.92) |
Protocol: |
V.92, V.90, V.44, V.42bis |
Standards Compliance: |
ITU V.92, V.90, V.44 |
Power Supply: |
External AC Adapter (not included) |
Form Factor: |
Desktop External |
SKU: |
7246 |
Seller Notes: |
Power supply not included |
Country/Region of Manufacture: |
USA |
Condition: |
Used – Pulled from Working Environment |
Condition Notes: |
AT&T 4024 external modem, used condition, pulled from working environment. Power supply not included — compatible external adapter required. Ready for legacy/retro use. |
