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sync modem eliminator

Features / Benefits

  • SYNC Modem Eliminator
  • EIA RS-232, V.24 Female DB-25 Connectors
  • Data Rates - Synchronous to 128Kbps
  • FPGA design allows very low jitter at high end speeds
  • Options for RTS/CTS delay, DSR, DTR on a per port basis
  • Timing - Internal or accepts external timing from DTE for test purposes
  • Status LED's for each port allows ease of connection and trouble shooting
  • 110/220VAC switch selectable
  • Sturdy Metal Enclosure


The SME-232 modem eliminator allows two RS-232 DTE devices to communicate within proximity of each other. The SME-232 transmits data bi-directionally at data rates up to 128Kbps between DTE devices. All clocking and signal crossover are provided within the SME-232. The unit is equiped with two DB-25 female connectors.

The SME-232 is an excellent choice for interconnecting your LAN or mainframe equipment. Substantial cost savings are derived by eliminating the need for leased line or dial line modems.

Installation is fast and simple by setting the internal switches for Clocking, Carrier Operation and RTS to CTS delay. The SME-232 has status LED's for each attached DTE device which allows the user to visually confirm the presence of control signals.

The SME-232 utilizes state of the art digital CMOS technology to provide a feature filled product at a very affordable price. Our Field Programmable Gate Array (FPGA) design has allowed us to offer this product with a wide selection of user Baud Rates. This design approach has also reduced the amount of clock jitter for high speed 128Kbps transmissions.

The SME-232 is housed in a sturdy metal enclosure and operates on 110/220VAC. Typical MTBF figures are in excess of 100,000 hours of operation.

The SME-232 has a three year warranty and a 24 hour turnaround on warranty repairs.

synchronous modem elininator diagram


Application Interconnection of two RS-232 DTE (Terminal) devices located within proximity of each other
Capacity Two (2) RS-232 DTE's
Interface RS-232 using V.24 electrical specification
Data Rates Up to 128Kbps
Channel Interface Two Female DB-25 Connectors
Surge Protection Main power supply
Power Source 100-120 to 200-220VAC @10%, 50/60Hz, 0.16/0.08A, external 110/220 volt select switch, IEC Power Inlet, (2) 5mm Fuses
Environmental Operating Temperature....32º to 120º F (0º to 50º C)
Relative Humidity.............5 to 95%
Altitude............................0 to 10,000 feet
Dimensions Height ....... 1.75 inches (4.44 cm)

Width ........ 7.90 inches (20.07 cm)

Length ....... 9.00 inches (22.86 cm)

Weight 2 pounds (0.914Kg
Warranty Three Years, Return to Factory
Ordering Information: Model: SME-232
Description: Synchronous RS-232 Modem Eliminator
Included with each unit: 1) Operations Manual

2) U.S.A. Grounded Power Cord, Part # 713015

3) Optional Power Cords

....A) United Kingdom, Part # 713016

....B) Continental Europe, Part # 713017

....C) Other: Specify Country on Purchase Order


1) Spare Data Center Fuses

....A) 160ma Fuse, Qty (2) Part # 714000

....B) 80ma Fuse, Qty (2) Part # 714001