222N Series Interface Powered, RS-232 to RS-422 Converters (Transmit & Receive Data Only)
 2010 & 2011 RS-232, Asynchronous to Synchronous Converters
 2012 Powered, Asynchronous to Synchronous Converter
 2014 Passive, RS-530 to V.35 Converter 
 2015 Passive, RS-449 to V.35 Converter 
 2016 Mini, X.21 to V.35 Converter
 2017RC DTE, RS-232 to 20 mA Current Loop, Interface Converter Rack Card
 2018 RS-232 to 20mA Current Loop Converter (DB-25 to DB-25)
 2020 Series Passive RS-232 to V.35 Converters
 2020P & 2020PRC Powered RS-232 to V.35 Converter & Rack Card
 2021 RS-232 to X.21 Interface Converter
 2021P Powered, RS-232 to X.21 Converter
 2022 RS-232 to RS-422/449 (V.36) Interface Converter
 2025 & 2029 Auto-Directional, Serial to Parallel Converters
 2026 & 2027 Self-Contained, Serial to Parallel Converters
 2030 RS-232/423 (Serial) to IEEE-1284 (Bi-Directional Parallel) Converter
 2035 & 2039 High Speed, Auto-Directional , Serial to Parallel Converters
 2040 V.35 to HSSI (High Speed Serial Interface) Converter
 2065RC & 2066RC RS-232/V.35 to X.21 Converter Rack Cards
 2070 Co-Directional G.703 Converters
 2073 G.703/64-kbps Interface Converter
 2073RC 64 kbps/G.703 Access Converter
 2085 Interface Powered, RS-232 to RS-485 Interface Converter (with Handshaking)
 2089 Interface Powered, RS-232 (EIA-574) to RS-485 Interface Converter (with Handshaking)
 2711 t1 / ft1 to v.35 interface converter/csu/dsu
 80 MagiConnector?, Semi-Automatic, RS-232 Interface Converter

RAD Data Communications Interface Converters

FCD-20  Rate and Interface Converter for E1 Multiplexers   
RAD RIC-24/35 V.24/V.35 Interface Converter
RAD SPD-T1/802 T1 to E1 Rate and Interface Converter 
RAD MIC Series Miniature Interface Converters
RAD ITA-703 Rate and Interface Converter
RAD SPD-703-1 G.703 Codirectional Rate and Interface Converter

Telebyte Interface Converters

Telebyte 121        Dual RS-232 to RS-422 Interface Converter - Rack Mount
Telebyte 167        RS-232 to V.35 Stand-Alone Interface Converter
Telebyte 240        Universal RS-232 to V.35 Interface Converter
Telebyte 242        X.21 to RS-232 Interface Converter
Telebyte 243        Universal X.21 to EIA 232 Interface Converter
Telebyte 245        Opto Isolated Superverter RS-422/RS-485 to RS-232
Telebyte 253        Non-Powered RS-232 to RS-422 Interface Converter
Telebyte 256        Non-Powered RS-232 to RS-422 Interface Converter with LCD Display
Telebyte 260        RS-422 to RS-232 Interface Converter
Telebyte 261        RS-232 to RS-422 Interface**
Telebyte 262        Opto Isolated RS-232 to RS-422 Interface Converter, 10KV protected
Telebyte 263        Non-Powered RS-232 to RS-422 Interface Converter, 10KV Protected
Telebyte 265        Opto Isolated RS-232 to RS-422 Interface Converter
Telebyte 266        RS-232 to RS-485 Interface Converter
Telebyte 267-1/2    Card Mounted EIA-530 to RS-232 Interface Converter
Telebyte 267-3/4    Card Mounted EIA-530 to RS-232 Interface Converter
Telebyte 285        Superverter? RS-422/RS-485 to RS-232 I/C
Telebyte 287        RS-232 to RS-422 Opto Isolated Interface Converter, non powered
Telebyte 290        RS-422/RS-485 Concentrator - Wiring Hub
Telebyte 365        Multimode RS-422/RS-485 to RS-232 Interface Converter and Display
Telebyte 366        RS-232 to RS-485 Interface Converter with LCD Display
Telebyte 62-1/2     EIA-530 to RS-232 Interface Converters
Telebyte 62-4PS     Power Supply for 62-1/2, 62-7/8
Telebyte 62-7/62-8  EIA-530 to RS-232 Interface Converters
Telebyte 63-2S      RS-232 to RS-422 Interface Converter - Full Duplex
Telebyte 63-3/4     RS-232 to RS-422 Interface Converter - Full Duplex and 3 controls
Telebyte 65         RS-232 to Current Loop Converter
Telebyte 67-1/2     RS-232 to V.35 Interface Converters
Telebyte 78         Dual Current Loop Converter - Rack Mounted 

We carry other Manufacturers of Hardened Ethernet as well, including
TC Communications, DCB, EtherWan, Black Box, Tyco and Others

Contract Buying and Volume Discounts available !!