I would highly recommend not using arbitrary SFP modules with MTRX.
From the MTRX Kbase:
https://avid.secure.force.com/pkb/ar...s-MTRX-Support
Qualified SFP Modules:
SFP's that are distributed by NTP and/or Avid are supported (contact your reseller)
SFP's from other third parties may not work with Pro Tools | MTRX and are not recommended
MADI SFP Compatibility:
What is the difference between 850nm and 1300nm SFP's?
850nm, which uses 100BASE-SX cable, is a lower cost alternative. This is due to the use of short wavelength optics, which are significantly less expense than the long wavelength options used in 100BASE-FX. Maximum 850nm cable runs are approximately 1,000 ft., while 1300nm can travel as far as 6,600 feet.
Products that use the 1300nm wavelength include the Pro Tools | HD MADI, as well as most digital live sound consoles, such as those by Soundcraft, Studer, and Yamaha. Consult your owner's manual or the manufacturer for your system’s optical wavelength.
Jeff