Sorrento Networks (FIBR) - Get Report was up 26.7% in midafternoon ahead of its earnings release Wednesday. The maker of optical networks products warned Friday that first-quarter revenue would be lower than expected on the delay of a customer order during the quarter.

Today, Sorrento announced a partnership with enterprise optical networker

Terabeam

, to increase capacity and access for its Ethernet services. The impact of the deal was uncertain.

Ciena's

(CIEN) - Get Report

deal with

AT&T

(T) - Get Report

, announced before the open, also helped boost Sorrento's shares.

Ciena was up 7.5%.