The CMA4425 SM OTDR Module is GN NetTest's single-mode optical time-domain reflectometry module designed for the CMA4000 and CMA4000i mainframes. It enables OTDR testing on single-mode fiber when installed in CMA4000 or CMA4000i systems. This module expands the CMA family's fiber test capabilities by adding a dedicated SM OTDR option for compatible analyzers.
