The grades of 3 Communications Equipment stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

ADTRAN, Inc. (ADTN) improves from a B to a A rating this week. ADTRAN, Inc. designs, manufactures, markets and services network access solutions for communications networks for providers of communications services and small- and mid-sized businesses. The company also gets A’s in operating margin growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of ADTN stock.

This week, Black Box Corporation’s (BBOX) ratings are up from a C last week to a B. Black Box Corporation is a network infrastructure services provider that offers one-source network infrastructure services for communications systems. The company also gets A’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of BBOX stock.

Network-1 Technologies, Inc. (NTIP) boosts its rating from a B to a A this week. The company also gets A’s in sales growth, operating margin growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of NTIP stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.