Ribbon Communications heads into its third-quarter report with a split personality that the market has decided to judge harshly. Last quarter, management described an IP optical business posting record bookings, a growing enterprise franchise and a new artificial-intelligence voice partnership with Salesforce. It also cut its full-year revenue and EBITDA outlook because Verizon's voice modernization work keeps slipping. Since then the stock has lost nearly 42% while the S&P 500 edged higher. The October 27 release, due after the close, has to show whether the optical momentum is turning into revenue and profit fast enough to offset the Tier 1 voice drag.
The Street is looking for earnings of $0.04 a share on revenue of about $221.4 million, roughly 2.8% above the year-ago quarter. That is modest growth, but it would mark a sharp sequential jump from the $192.3 million and $0.05 loss reported last quarter. Management guided to $215 million to $230 million, so consensus sits comfortably inside the range, slightly below the midpoint. The whisper number of $0.06 is a touch above consensus, a small gap that suggests some quiet confidence on profitability rather than a meaningfully higher bar. The bigger point is that the full-year range of $810 million to $840 million implies a strong fourth quarter on top of this one. Anything near the low end of the third-quarter guide would put that second-half ramp in doubt.
The optical story is where validation should come first. Book-to-bill climbed from 1.1 times at the end of last year to 1.5 times and then a record 1.6 times, with backlog up more than 60% this year. Data center interconnect projects doubled to six, and defense-related revenue jumped about 60%. Investors should want to see IP optical revenue hold or build on the $82 million posted last quarter and bookings stay above parity. A steep drop in book-to-bill would suggest the earlier strength was lumpy rather than a durable cycle. Progress on the more than $50 million new-customer pipeline and the African backbone award would also help. Because optical carried a segment EBITDA loss of $6 million, the quality of that growth matters as much as the quantity.
Margins are the second swing factor. Management already trimmed its gross margin target to 51% to 52%, blaming a mix shift toward lower-margin optical gear and softer cloud and edge services. It also flagged roughly $2 million a quarter of component and logistics inflation in memory, silicon and optics, with only partial pass-through, plus possible supply limits in the second half. If supply shortfalls hold back shipments, the optical backlog could become a reason for disappointment rather than reassurance. Evidence that pricing actions are sticking would ease that worry.
On the voice side, the test is whether the Verizon slippage has stabilized. Cloud and edge revenue fell 19% from a year earlier last quarter, and management called the delay a timing issue pushing opportunity into 2027. Further erosion, or another cut to the full-year outlook, would challenge that deferral framing. Updates on the Fortune 50 enterprise wins and early traction from the Salesforce AgentForce integration would show whether new growth sources are taking shape.
Sentiment has swung hard. About 78% of readers lean bearish, up from under 20% before the last report. The stock trades at $1.32, just above its post-earnings low of $1.30 and far beneath its 200-day moving average of $2.32. That pessimism lowers the bar, but it also reflects real doubt about the full-year targets. The report will hinge on whether Ribbon can reaffirm its full-year range while showing that optical bookings are converting into revenue without further margin erosion. Doing both would suggest the selloff overshot. Missing on either would suggest the market read the guidance cut correctly.