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AT&T 2236-M40 Comsphere 3440-22 External Modem
- External modem form factor
- Comsphere 3440-22 model
- Designed for reliable data communication
- Utilizes standard telephone lines
- Requires external power supply
- Serial interface for computer connection
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Product Overview
The AT&T 2236-M40 is an external modem, specifically a Comsphere 3440-22 model. This unit is designed for robust data communication over telephone lines. It requires external power and a telephone line connection.
Technical Information
| Modem Type | External |
| Product Line | Comsphere |
| Model Number | 3440-22 |
Additional Specifications
| Interface | Serial (Computer), RJ-11 (Phone Line) |
| Power Source | External AC Adapter (Typically Required) |
Product Description
The AT&T 2236-M40, identified as a Comsphere 3440-22 external modem, is a piece of telecommunications hardware designed for reliable data transmission over analog telephone networks. The Comsphere line was often associated with higher-end or business-oriented communication solutions from AT&T. This external modem connects to a host computer via a serial interface (e.g., RS-232) and interfaces with the Public Switched Telephone Network (PSTN) using a standard RJ-11 telephone jack. It requires an external power source, typically an AC adapter, to operate. The unit would feature status indicator LEDs to provide users with information about its operational state, such as power, data transmission, and connection status. The Comsphere 3440-22 would have supported various communication protocols and data rates common during its era, enabling applications like remote access, data transfer, and potentially faxing. Its robust design and the Comsphere branding suggest a focus on dependability for critical communication tasks.
