Is Ribbon Communications, Inc. overvalued or undervalued?

As of 16 February 2022, Ribbon Communications, Inc. has moved from an attractive to a risky valuation grade. The company is currently considered overvalued. Key ratios indicate significant concerns, with a Price to Book Value of 1.71, an EV to EBIT of 39.88, and a negative ROE of -9.94%.
In comparison to its peers, Ribbon's valuation metrics are troubling; for instance, NextNav, Inc. has a P/E of -25.04 and Weave Communications, Inc. has a P/E of -21.44, both indicating a challenging environment for similar companies. The company’s recent stock performance has outpaced the S&P 500 over the past year, with a return of 30.03% compared to the S&P 500’s 10.26%, but this does not mitigate the overall valuation concerns.