Some bits and pieces on Goldman's upgrade of INFN:

Shares of beleaguered fiber-optic networking equipment vendor Infinera (INFN) are up $1.05, or 10%, at $11.40, after Goldman Sachs's Doug Clark this morning raised the shares to Buy from Neutral, arguing that it's now a better bet than those of competitor Ciena (CIEN), whose shares he cut to Neutral from Buy. 
There's a "product cycle story" for Infinera, writes Clark, that's going to "re-acclerate" its revenue over the next two years he argues. 

Clark predicts revenue for Infinera will "bottom" this quarter, and start to turn around in the second half of the year. That's assuming M&A in the telecom world becomes less of an overhang to telco spending. 

The product story, as Clark sees it, starts with the shipments in Q2 of something called "Cloud Xpress 2," a "data center interconnect platform." 

Then later that quarter comes the "XT-3300," which is a "long-haul version of the CX platform," built on the fourth generation Photonic Integrated Circuit," or PIC, the underlying component that powers Infinera's gear. 

Then in Q3 come updates to Infinera's "metro" products, the "TM series." 

Next year comes the "fifth generation" of the company's PIC, notes Clark. The arrival of that technology will cut by more than half the span of time between PIC updates, he notes, "which could help it maintain a more competitive position within the industry."