The S4 Group News and Press Releases

Expanded System-91 Device Support

Ogden, Utah (March 27th, 2012) - Our original implementation of the S4 Open Appliances included support for all MetasysŪ N2 devices. The N2 Router design followed the various N2 protocol specifications available, supplemented by our own reverse engineering efforts to understand parts of the protocol not publically documented. N2 is actually a series of sub-protocols co-existing on the same serial bus, sharing a common framing, and with a common addressing strategy. Within the data frames, the N2 Open, VMA (N2B), and System-91 protocols are completely separate and unique implementations. The N2 Open and N2B standards are unique but share a common trait in that they reflect the data organization and user experience that a MetasysŪ operator would have from the MetasysŪ Operator Workstation. The system-91 protocol, however, is drastically different from the other two. In fact, System-91 devices differ in many ways from N...