Fiber-optic networking equipment vendor Infinera (INFN) this evening surpassed its own forecast sales estimate, from back in October, reporting sales and earnings for the fourth quarter above analysts’ estimates.

The company reports something called “invoiced shipments,” which the five analysts covering the stock use when they refer to “revenue,” instead of the actual revenue item in accordance with generally accepted accounting principles (GAAP).

On that basis, Infinera this evening reported $93.4 million in shipments, up 32% from the year-earlier figure and 16% from the 3rd quarter, beating the company’s own forecast of between $83 and $85 million, and Street estimates for 85.4 million. Again, on a non-GAAP basis, the company’s profit from those invoiced shipments was 17 cents a share, up from a loss of $1.04 per share a year earlier, and several times Street estimates of 2 cents per share.

On a GAAP basis, sales of $76 million were up 47% from the year-earlier $43.8 million.

In its press release, the company noted that its customer base became more diverse, with four customers each accounting for 10% or more of revenue, versus only two such 10% customers a year earlier. Whereas a year earlier, the company’s single largest customer (most likely Level3 Communications (LVLT)) made up 47% of invoiced shipments, no one customer accounted for more than 18% in the current quarter, the company said. Infinera now sells to 4 of the top 5 U.S. cable operators, the company noted.

The company will hold a conference call with analysts at 5 pm, Eastern, which can be accessed here.

Infinera shares are jumping on the news, up over 8% in after-hours trading at $11.02, after rising 1.7% during normal trading.