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V35 to X21 Interface Converter product photo

Features / Benefits

  • V35 to X21 Interface Converter
  • Interface - V.35 and X.21, V.35 (MR-34) Male and DB-15 Female
  • Data Rates -Up to 6Mbps
  • Line Powered
  • 6 Foot Cable Included
  • Passes All Appropriate Control Signals
  • Bi-Directional Transmission
  • Transparent to Data
  • Compact and Easy To Install


The V35-X21 V35 to X21 Interface Converter is designed to provide signal level conversion between V.35 DCE (Modem) equipment and X.21 DTE (Terminal) equipment.

The V35-X21 transmits data bi-directionally at data rates up to 6Mbps. The device has no switches or straps to configure.

Ideal for Local Area and Wide Area networks the V35-X21 interface converter is line powered and requires No AC power source.

Utilizing new silicon chip technology this device requires less than 5ma for operation. This equates to savings in your power requirements and with battery backup at your data center.

Applications that can benefit from the V35-X21 are LAN-WAN connectivety, video conferencing, Adaptation of older model test equipment and new high speed V.35 Modems connecting to X.21 DTE equipment.

The V35-X21 is protocol independent and passes all appropriate Data, Clock and Control Signals.

The V35-X21 is housed in a sturdy metal enclosure and will provide in excess of 100,000 hours of reliable service.

The V35-X21 has a three year warranty and a 24 hour turnaround on warranty repairs.

V35 to X21 Interface Converter network application diagram


Application V.35 to X.21 Interface Converter and Signal Level Conversion
Capacity One DCE V.35 and one RS-530 Sync DTE device
Interface V.35 and X.21
Data Format Data transparent at all data rates
Data Rates Up to 6Mbps
Switches Options for clock alignment
V.35 Physical Interface Male V.35 Connector
X.21 Physical Interface Female DB-25 Connector
Power Source

Line Powered from existing equipment - Draws 5ma - No AC power required


Environmental Operating Temperature..32º to 122º F (0º to 50º C)
Relative Humidity...........5 to 95% Non-Condensing
Altitude.........................0 to 10,000 feet
Dimensions Height ....... 0.50 inches (1.27 cm)

Width ........ 1.75 inches (4.44 cm)

Length ....... 1.75 inches (4.44 cm)

Weight 1/2 pound (0.228Kg), Includes Cable and Shipping Box
Warranty Three Years, Return To Factory
Ordering Information Model: V35-X21 M/F
Description: V.35 to X.21 Converter, Male V.35 and Female DB-15
Included with each unit: unit: 1) Installation Guide

2) 6 foot cable