Fiber operators today fall into one of three distinct maturity levels in IQGeo's Fiber Operator Maturity Model: The goal for any fiber optic network manager should be to reach Level 3 which helps to ensure optimal network performance at all times, regardless of. Fiber operators today fall into one of three distinct maturity levels in IQGeo's Fiber Operator Maturity Model: The goal for any fiber optic network manager should be to reach Level 3 which helps to ensure optimal network performance at all times, regardless of. Fiber operators take diferent approaches when it comes to fiber network management and documentation. Fiber operators take diferent approaches when it comes to fiber network management and documentation. Many still store fiber data, records, splicing information, etc., on paper maps and. FTTx access network boxes are fiber distribution enclosures used to organize, protect, and manage optical connections within fiber access networks. Although they all belong to the optical distribution and management system, their. MR-311 presents an overview of emerging Fiber Infrastructure Management Systems (FIMS) that facilitate installation, operation, management and maintenance of the physical plant (infrastructure) layer of Optical Networks, in general, and Passive Optical Networks, in particular.