The agreement means that Sable will tell the US Patent and Trademark Office that it is abandoning its patent rights and no further claims based on those patents will be possible.
"Sable is a patent troll. It doesn’t make, develop, innovate, or sell anything. Sable IP is merely a shell entity formed to monetize (make money from) an ancient patent portfolio acquired by Sable Networks from Caspian Networks in 2006."
Damn... What an unbelievable douche business model.