Description
Black Box MX330A-D Modem Serial Data Communications Interface
The Black Box MX330A-D is a standalone serial modem designed for reliable data communications over telephone lines and serial networks. This unit functions as a modulation/demodulation interface for transmitting digital data across analog voice-grade telephone circuits, making it essential for legacy industrial automation, remote monitoring, and telecom infrastructure applications where direct serial connectivity to distant systems is required.
Specifications & What's Included
- Model: MX330A-D
- Manufacturer: Black Box Corporation
- Device Type: Standalone serial modem
- Interface: RS-232 serial port
- Standards: Bell 212A and V.22bis compatible
- Data Rate: Up to 1200 bps
- Form Factor: Desktop standalone unit
- Connectors: DB-9 or DB-25 serial (exact configuration per unit)
- Power: AC powered (external adapter)
- Condition: Used, inspected, in good working order
Applications
The MX330A-D was widely deployed in industrial and commercial settings throughout the 1980s and 1990s for remote terminal access, point-of-sale systems, environmental monitoring, and industrial control system communications. These modems are still used by legacy system operators and collectors maintaining older automation networks, field-monitoring systems, and telecom labs. The Bell 212A standard ensures broad compatibility with period telephone infrastructure and older data terminals.
This Black Box MX330A-D serial modem has been inspected and is in good used condition. The unit shows typical cosmetic wear consistent with its age and previous service use. All connectors and controls are intact. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
Black Box |
Model: |
MX330A-D |
Type: |
Serial Modem |
SKU: |
10297 |
Interface Type: |
Serial (RS-232/RS-422) |
Form Factor: |
Standalone Desktop |
Standards Compliance: |
Bell 212A, V.22bis compatible |
Condition: |
Used – Inspected and Tested |
Condition Notes: |
Black Box MX330A-D modem, used condition, inspected and ready. Typical wear from service use. All connectors intact. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |