To all over the world since 1985.
We provide high quality , competitive, low cost products to catalog sales or trade companies in USA, Europe, Asia, etc. All news are on the web-site www.3a.com.tw.

3A COMMTEK is currently based in Towyeng, Northern Taiwan.
We have been designing and manufacturing in
RS-232/V.24 <> RS-485/422 interface converter series (new: 485-IA, 485-SMART+A)
RS-232/V.24 <> Current Loop interface converter series (new:CL-IIA)
RS-232/V.24 <> RS-449 interface converter series
RS-232/V.24 <> V.35 interface converter series
RS-232/V.24 <> X.21 interface converter series
RS-232/422/485/X.21/V.35/449 interface protocol analyzer series
RJ-45/11 LAN cable tester series
RS-232/V.24 break out box series
USB<>RS-232/V.24/RS-485/RS-422/Current Loop series
RS-232/V.24<>TTL series
(New:none power needed,only RS-232's TD,RD and Gnd signals, the converters could Tx&Rx 1000meters with 115.2KBPS (485-IA and 485-SMART+A), 300meters with 19200BPS (CL-IIA)).