(CIEN) - Get Report

was hammered in the premarket session despite posting fourth-quarter earnings that were in line with analysts' expectations.

The Linthicum, Md., optical-equipment maker said it earned $17.1 million, or 5 cents a share, before items in the quarter, matching the consensus estimate. Sales rose 27% to $367.8 million.

On Instinet, Ciena's shares were off $1.57, or 8.7%, to $16.40.