Multitech MT224EH 2400 Baud Modem RS-232 Serial Connection Data

Multitech MT224EH 2400 Baud Modem RS-232 Serial Connection Data

The Multitech MT224EH is a 2400 baud dial-up modem designed for asynchronous data communications over standard telephone lines. This RS-232 serial modem is Hayes AT command compatible and was widely used in legacy computer systems, retro computing setups, and telecommunications equipment throughout the 1980s and 1990s. The MT224EH supports Bell 212A and V.22bis modulation standards, making it suitable for connecting older personal computers, minicomputers, and data terminal equipment to remote systems via dial-up telephone connections.

Specifications & What's Included

• Manufacturer: Multitech Systems
• Model: MT224EH
• Data Rate: 2400 baud (asynchronous)
• Modulation Standards: Bell 212A, V.22bis
• Interface: RS-232 serial connection (DB-9 or DB-25 connector)
• Command Set: Hayes AT command compatible
• Form Factor: Desktop/benchtop unit
• Power: Requires external AC adapter (not included with this sale)
• Included: Modem unit only
• Not Included: AC power adapter, cables, documentation

Applications

The MT224EH was a standard modem for retro computer systems and remains useful for legacy system restoration, hobby computing, and telecommunications history projects. These modems are commonly used by enthusiasts working with vintage personal computers from the 1980s and early 1990s, including IBM compatibles, Commodore systems, Apple II machines, and various business minicomputers. The unit is well-suited for bulletin board system (BBS) connectivity, remote dial-up access, and data transfer applications in environments where legacy equipment remains in service or is being preserved. Collectors and retrocomputing hobbyists value these modems for their historical significance and compatibility with period-correct system builds.