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Patton Electronics 2021
RS-232 to X.21 Interface Converter
Black Box IC949A IC950A

Patton Model 2021
RS-232 to X.21 Interface Converter
Bridge the Gap Between LAN and WAN Hardware
Model 2021
Patton Part # Black Box Part # Description of the Product
2021MC-MT IC949A  Interface Converter RS232 - X.21 
2021MT-MC IC950A  Interface Converter RS232 - X.21 


  Features & Benefits
  • Bi-Directional RS-232 to X.21 Conversion
  • No AC Power or Batteries Required
  • Supports Data Rates to 384 Kbps
  • Equipped with Integral 6 Foot Cable
  • Passes Appropriate Control Signals

The Patton Model 2021 allows a synchronous RS-232 host to communicate bi-directionally with a synchronous X.21 modem. Supporting synchronous data rates to 384 kbps, the Model 2021 is the smallest converter of its kind, and requires no AC power or batteries to operate. And there's no configuration needed for the Model 2021. Because of its high speed capabilities, the Model 2021 is typically used in WAN connectivity, video conferencing and other high speed applications. Since it's protocol independent and passes all appropriate data, clocking and control signals, the Model 2021 is as easy to use as a patch cable. Every system integrator's toolbox should contain a Model 2021!

Product Highlights

Rack Mount X.21 to RS-232 and V.35 Converters.

Model 2021RM

The Model 2021 is typically used in LAN-WAN connectivity, video conferencing and other high speed applications where one vendor's DCE is required to communicate with another vendor's DTE.



Data Rate: Up to 384 kbps
Operation: Synchronous transparent to protocol
Interfaces: RS-232 and X.21
Modes: Full or half duplex
Cable: 6 feet (1.8km)
Power: None required
Dimensions: 2.66" x 2.10" x 0.73" (6.8 x 5.3 x 1.9 cm)

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