Hayes had also licensed the '302 patent to two chipset manufacturers, Rockwell and Silicon Integrated Systems (SiS). In 1991 Rockwell introduced a new low-cost chipset supporting the new v.32bis 14,400 bit/s standard, one of the first to do so. It was an immediate bestseller, and other chipset companies immediately scrambled to catch up, all of them licensing '302 as well. Some even offered versions with both TIES and Hayes escape sequences, which could be determined via AT commands that returned the internal configuration of the modem, typically ATI4.