Core Insights - Ribbon Communications Inc. reported strong cash flow and bookings driven by an expanding customer base in voice modernization, with U.S. Tier 1 service provider sales projected to increase over 25% in 2025 [1][2] - The fourth quarter results were affected by delays in customer projects and budget timing, but the company achieved a record level of product and services bookings, including over $50 million from new voice modernization programs [2][4] - The company is targeting growth in high-demand AI and defense markets, anticipating increased government spending in these areas [1][2] Financial Performance - Fourth Quarter 2025 financial results showed revenue of $227 million, down from $251 million in Q4 2024, with GAAP operating income of $9 million compared to $33 million in the previous year [4][5] - Non-GAAP adjusted EBITDA for Q4 2025 was $40 million, down from $55 million in Q4 2024, while GAAP gross margin decreased to 53.3% from 55.7% year-over-year [4][5] - For the full year 2025, total revenue was $845 million, slightly up from $834 million in 2024, but GAAP operating income turned to a loss of $3 million compared to a profit of $17 million in 2024 [4][5] Business Outlook - The company projects revenue for 2026 to be between $840 million and $875 million, with non-GAAP gross margin expected to range from 52.5% to 53.5% [6] - For Q1 2026, revenue is projected to be between $160 million and $170 million, with non-GAAP gross margin anticipated to be between 48% and 49% [6] - The company expects to benefit from a new tax advantage that could reduce future cash tax payments by approximately $15-$20 million over the next several years, starting in 2026 [2][6]