IBM 11F5976 Modem 19200 Baud V.28 V.29 Serial Communication

IBM 11F5976 Modem 19200 Baud V.28 V.29 Serial Communication

The IBM 11F5976 is a classic serial modem designed for reliable data communication over standard telephone lines and dedicated serial connections. Operating at 19200 baud, this modem supports the V.28 and V.29 protocols, making it compatible with a wide range of legacy computing systems and telecommunications environments. The modem features standard RS-232 serial interface connectivity, the industry-standard connector type for computer-to-modem communication throughout the 1980s and 1990s.

Specifications & What's Included

• Manufacturer: IBM
• Model: 11F5976
• Data Rate: 19200 baud
• Protocol Support: V.28, V.29
• Interface: RS-232 serial
• Form Factor: Desktop unit

Applications

The IBM 11F5976 modem is a piece of classic data communications equipment from the era when external modems were the standard interface between computers and telephone networks or remote systems. This modem type was widely used in office environments, academic institutions, and industrial facilities for remote terminal access, file transfer, and asynchronous data communication. The V.28 and V.29 protocol support provided compatibility with a broad installed base of computer systems and communication networks. Today, these modems remain valuable for maintaining legacy system connectivity, system documentation, and retrofitting vintage IBM-compatible computers and terminals with authentic period hardware. Collectors and vintage computing enthusiasts also seek these units as historically significant examples of IBM's networking products from the microcomputer era.