The silicon pixel detector of the CMS experiment at CERN will be replaced with an upgraded version in the beginning of 2017 with the new detector featuring an additional barrel- and end-cap layer resulting in an increased number of fully digital read-out links running at 400Mb/s. New versions of the PSI46 read-out chip and Token Bit Manager have been developed to operate at higher rates and reduce data loss. Front-End Controller- and Front-End Driver boards, based on the uTCA compatible CTA AMC which is a variant of the FC7 card, are being developed using different mezzanines to host the high-speed optical links for the digital read-out and control system.
This contribution will give an overview of the system architecture and first experience and results obtained with test systems and a pilot system installed in CMS. Furthermore the validation and deployment of the uTCA backend electronics will be highlighted.