F9 Systems and NESA have developed a newsletter-like format that discusses ATCA design considerations. The August 2007 version addresses multi-gigabit ATCA design architectures and featues as well as a methodology on how to eliminate ATCA thermal failures.
ATCA 2005 Summit Presentation by Dr. Edward P. Sayre, NESA
Abstract: The design and qualification of multi-Gigabit ATCA and MicroTCA backplanes is a complex process. As the ATCA specification is presently written, the interconnects are defined in terms of the logical slot numbering, which permits various physical configurations. Two architectures supported by the ATCA specification are single or redundant switch-centric and full or partial meshes. This presentation focuses on the interconnect design of various ATCA backplane architectures. For simplicity, switch architectures will be emphasize but the principles will apply to mesh architectures as well.