Under-the-Radar Tech Stocks for Today

"Under-the-Radar Stocks" is a daily feature that uncovers little-known companies worthy of investors' consideration. Check in at 5 every morning to find out about stocks that tend to beat their bigger brethren.

Technology stocks took the spotlight Monday as Cisco(CSCO Quote) was selected to replace General Motors(GM Quote) in the Dow Jones Industrial Average.

Apple(AAPL Quote), Research in Motion(RIMM Quote), Amazon(AMZN Quote) and Google(GOOG Quote), known as the "four horsemen of tech," have jumped more than 40% this year as the Nasdaq has risen 16%. Despite the tech rebound, undiscovered bargains remain. The following small-cap companies offer strong balance sheets, a discount and, the ultimate tech rarity, high dividend yields.

Minnetonka, Minnesota-based Communications Systems(JCS Quote) makes and sells modular connecting and wiring devices and media and rate conversion products in the U.S., U.K. and China. Although the company's first-quarter revenue declined 12%, earnings per share ballooned 650%. Communications Systems has an ideal financial structure. It holds just $3 million of debt and over $31 million in cash reserves. TheStreet.com Ratings upgraded Communications Systems to "buy" on May 12.

In line with the company's impressive operating performance, its stock has risen 37% this year. Nevertheless, the shares remain cheap compared with other communications equipment firms. They trade at a price-to-earnings ratio of 10.88, 58% cheaper than the peer average. The shares are also cheap on the basis of sales and book value. At its current price, the stock offers a dividend yield of 5.26%, higher than the S&P 500 Index's average of 3.42%. The company has a market value of just $82 million.

Huntsville, Alabama-based Adtran(ADTN Quote) develops products and services that provide access to communications networks. The company's first-quarter sales and earnings per share fell 8% to $111 million and $0.24, respectively. Although those results suggest weakness, Adtran is poised for growth due to its strong financial position. The company boasts a quick ratio of 3.97, indicating ample cash reserves, and has a low debt-to-equity ratio of 0.12. TheStreet.com Ratings lifted the stock to "buy" on April 30.