Hayes Smartmodem 300

A modest external modem that helped normalize automated dialing and answering through a command set later treated as de facto standard, despite a baffling spread of listed prices and no fixed technical core beyond its RS-232 interface.

The Hayes Smartmodem 300 was not the fastest, cheapest, or most technically detailed peripheral of its era. Surviving documentation reveals no CPU, memory, or physical specifications. Yet it occupied a critical niche: it was among the first modems to embed a documented command interpreter that allowed software to initiate calls, answer incoming rings, and reset operations without manual intervention⁸. This functionality formed the foundation of what would become the Hayes command set, a lingua franca later emulated across the industry⁸. The device supported bidirectional operation at 300 baud, with some references noting a 110/300 baud dual-rate capability², and provided auto answer and auto dial features, a notable convenience in an age when many users still relied on acoustically coupled modems or manual dialing⁴.

Physically, it was an external unit, interfacing with host systems via RS-232, a standard serial protocol that ensured broad compatibility with contemporary personal computers and terminals¹²⁴. No connector types beyond the mention of RS-232 are documented, nor are dimensions, weight, or internal components. Its design prioritized interoperability over integration, reflecting a transitional moment when modems were still treated as distinct, add-on peripherals rather than built-in features.

Pricing for the Smartmodem 300, however, defies synthesis. Sources list it at $165.00⁷, $169.95⁵, $180.00¹¹, $199.00⁴¹⁰, $219.00 (three separate citations)³⁹¹⁵, $229.00⁶, and as high as $289². The discrepancy may reflect regional pricing, dealer markups, bundled software, or temporal shifts, but the documentation offers no clarification. The absence of a consistent launch date or production timeline further muddies its market trajectory. The earliest citation appears in 1982¹⁴, the latest in 1986⁷, but no source specifies when the model was introduced or discontinued.

Hayes Microcomputer Products, Inc. positioned the Smartmodem 300 as part of a broader ecosystem. It appeared alongside models such as the Smartmodem 1200, Smartmodem 2400, and the Smartmodem IIc, suggesting a tiered product strategy¹⁵. Older lines like the Micromodem series and unrelated products such as the Chronograph and Transet 1000 were also marketed in proximity, indicating a diversification beyond modems^3591415. The company also offered Smartcom II, a proprietary communications software package sold separately at prices ranging from $89.00 to $99.95³⁴⁵, which reportedly enhanced usability but was not required for basic operation.

The Smartmodem 300’s legacy lies not in performance — 300 baud was already modest by the mid-1980s — but in abstraction. It shifted user and developer focus from physical line management to command-driven session control. That its command set was formally documented in technical manuals, such as the DIMUX UsersManual, underscores an intentional move toward standardization⁸. Yet the device itself remains under-specified: no internal architecture, power requirements, or mechanical details survive in the record. What endures is its role as a pivot, a piece of hardware whose software interface mattered more than its silicon.

References

1. 1986 06 BYTE 11-06 Computers and Music (1986)
2. Telecommunications with the IBM PCjr
3. 1984 03 BYTE 09-03 Simulation (1984)
4. BYTE Vol 10-01 1985-01 Through The Hourglass (1985)
5. 1985 07 BYTE 10-07 Computers and Space (1985)
6. MICRO Vol60-05 83
7. remark-volume7-issue10-1986 (1986)
8. DIMUX UsersManual
9. micro 70 mar 1984[ocr] (1984)
10. 1984 02 BYTE 09-02 Benchmarks (1984)
11. 1984 08 BYTE 09-08 Modula-2 (1984)
12. 1984 06 BYTE 09-06 Computers and Education (1984)
13. 1984 12 BYTE 09-13 Communications (1984)
14. remark-issue35-1982 (1982)
15. MICRO Vol70-03 84
16. micro 68 jan 1984[ocr] (1984)