RS232-CONVERTERS.COM SERIAL AND USB CONVERTER PRODUCTS SIMA S. ENTERPRISES   1-877-647-7434 SERIAL RS232, RS485, RS422, AND TTL CONVERTERS - USB ADAPTERS  GENDER CHANGERS - FIBER OPTIC CONVERTERS - ETHERNET CONVERTERS

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WORRY FREE GUARANTEE! 30 Day Money Back! • 5 Year Warranty! • Free Shipping! • Same Day Express Shipping! • Industry Proven Highest Quality Products!

With over 10,000 satisfied customers, Sima S. Enterprises offers the finest quality industry proven USB, RS-232, RS-485, RS-422, TTL, Ethernet, and Fiber Optic converters available.  All of our products are shipped the same day ordered and come with a 30 day satisfaction guarantee and a 5 year manufacturer's warranty. FREE WORLDWIDE SHIPPING ON ALL PRODUCTS OPTIONAL SAME DAY EXPRESS SHIPPING UNTIL 7:30 PM EST PRODUCT INVENTORY STATUS:   ALL PRODUCTS IN STOCK

Frequently Asked Questions

Question 9:  WHAT IS DTE / DCE? HOW DO I KNOW MY RS-232 DEVICE IS A DTE OR A DCE?

Answer:  DTE stands for Data Terminal Equipment, a PC is a DTE.  DCE stands for Data Communication Equipment, a Modem is a DCE.  DTE normally comes with a Male Connector, while DCE comes with a Female Connector, but that is not always the case.  Use the guide below as a simple way to confirm: Measure Pin 3 and Pin 5 (DB9 Connector) with a volt meter. If you get a voltage of -3V to -15V, it is a DTE device. If the voltage is on Pin 2, then it is a DCE device. Note: The result for the DB-25 Connector is reversed, and Ground for the DB-25 is on Pin 7.

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