This week, the overall grades of 6 Communications Equipment stocks are lower, according to the Portfolio Grader database. Each of these rates a “D” (“sell”) or “F” overall (“strong sell”).

QUALCOMM Incorporated (QCOM) declines this week from a D to a F. QUALCOMM Incorporated manufactures digital wireless communications equipment. The company also gets F’s in sales growth. For more information, get Portfolio Grader’s complete analysis of QCOM stock.

This week, Brocade Communications Systems, Inc.’s (BRCD) rating worsens to a D from the company’s C rating a week ago. Brocade Communications Systems, Inc. supplies networking equipment for the Global 1000 enterprises and service providers such as telecommunication firms, cable operators, and mobile carriers. For more information, get Portfolio Grader’s complete analysis of BRCD stock.

Mitel Networks Corporation (MITL) experiences a ratings drop this week, going from last week’s C to a D. Mitel Networks Corporation is a provider of communications solutions for organizations. For more information, get Portfolio Grader’s complete analysis of MITL stock.

Nokia Oyj Sponsored ADR (NOK) gets weaker ratings this week as last week’s C drops to a D. Nokia Oyj Sponsored ADR makes mobile devices and offers Internet services that allow people to access music, maps, media, messaging and games. The company also gets F’s in operating margin growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of NOK stock.

This week, Numerex Corp. Class A (NMRX) drops from a D to a F rating. Numerex Corp. Class A develops and markets a variety of communication and information products and services. The company also gets F’s in operating margin growth, earnings growth, earnings revisions, earnings surprise, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of NMRX stock.

AudioCodes Ltd. (AUDC) slips from a C to a D this week. AudioCodes Ltd. designs, develops, and markets products for voice and data over packet networks. The company also gets F’s in sales growth and operating margin growth. For more information, get Portfolio Grader’s complete analysis of AUDC 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.