The grades of 3 Communications Equipment stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

This is a strong week for Finisar Corporation (FNSR). The company’s rating climbs to B from the previous week’s C. Finisar Corporation provides fiber optic subsystems and network performance test systems which enable high-speed data communications over local area network and storage area networks. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of FNSR stock.

Digi International Inc. (DGII) is seeing ratings go up from a C last week to a B this week. Digi International Inc. develops products and technologies to connect and manage local or remote electronic devices over a network, via the Internet or via satellite. The company also gets A’s in operating margin growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of DGII stock.

Network-1 Technologies, Inc. (NTIP) boosts its rating from a B to a A this week. The company also gets A’s in operating margin growth, earnings growth, earnings momentum, 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.