This week, three Communications Equipment stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

This week, Zhone Technologies (NASDAQ:ZHNE) is making solid headway. The company’s rating improves to an A (“strong buy”) from last week’s B (“buy”) rating. Zhone Technologies designs, develops and manufactures communications network equipment for telecommunications, wireless and cable operators worldwide. Shares of ZHNE have increased 44.8% over the past month, better than the 1.3% decrease the Nasdaq has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of ZHNE stock.

Motorola Solutions, Inc. (NYSE:MSI) is seeing ratings go up from a B last week to an A this week. Motorola Solutions is a data communications and telecommunications equipment provider. For more information, get Portfolio Grader’s complete analysis of MSI stock.

Dragonwave Inc.’s (NASDAQ:DRWI) grade is moving up to a B (“buy”) this week from last week’s C (“hold”). DragonWave is a producer of high-capacity packet microwave solutions which support networking and other data transmission needs. For more information, get Portfolio Grader’s complete analysis of DRWI 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.