MOST Cooperation Provides New Physical Layer Specification

An integral approach was used to define the electrical and optical signal parameters for MOST150 as well as cost optimized standardized packages together with pin-out descriptions for optoelectronic converters. The specification addresses the challenges of soldering processes, changeability of fiber-optic elements with alternative replacements, as well as new opportunities to organize supply chains of components. Unambiguous signal definitions for operational states, power supply ramp-up and ramp-down scenarios, together with the use of established eye diagram testing methods, well known from the data- and telecom industry, safeguard an easy and robust development process.



MOST150 uses the well-known and established MOST25 1mm step index POF polymer fiber. The mechanical interface at the wire harness connector stays the same, only the optoelectronics are adapted to the new speed grade. By design, most of the elements of this new MOST150 specification can be carried over to future, cost optimized MOST25 generations.



Later in 2008, the working group will define the updated compliance process to test products for conformance to these requirements. This process will be carried over from MOST25 and will be enhanced with reliability testing methods.