I. Background

Fiber optic equipment is a core component of telecommunication operators' networks. Its stable operation is crucial for ensuring communication service quality and enhancing user experience. With the continuous development of services and the expansion of network scale, fiber optic equipment faces increasingly complex operating environments and higher performance requirements. To ensure the reliability, security, and efficiency of fiber optic equipment, this detection and maintenance plan is developed.

II. Detection and Maintenance Objectives

1. Ensure the normal operation of fiber optic equipment, minimizing service interruption time caused by equipment failures.
2. Timely identify and resolve potential problems with fiber optic equipment, improving equipment lifespan and performance.
3. Ensure the security and stability of the fiber optic network to meet user needs for high-quality communication services.

III. Detection and Maintenance Scope

1. Fiber optic lines: Including long-distance trunk fibers, local access fibers, indoor and outdoor fiber optic jumpers, etc.
2. Fiber optic connection equipment: Fiber optic distribution frames (ODF), fiber optic adapters, fiber optic couplers, fiber optic flanges, etc.
3. Fiber optic transmission equipment: Optical terminal equipment, fiber optic transceivers, wavelength division multiplexing (WDM)/dense wavelength division multiplexing (DWDM) equipment, optical amplifiers, etc.
4. Fiber optic terminal equipment: Optical network units (ONU), optical line terminals (OLT), etc.

IV. Detection and Maintenance Team

1. Team Composition: Composed of professional fiber optic engineers, technicians, and maintenance personnel with rich experience and expertise in fiber optic equipment detection and maintenance.
2. Training and Assessment: Regularly organize team members to participate in professional training to learn the latest fiber optic technologies and equipment maintenance methods, improving the team's overall technical level. At the same time, a strict assessment mechanism is established to ensure that team members are proficient in detection and maintenance skills.

V. Detection and Maintenance Plan

Daily Inspection

1. Fiber optic line inspection: Daily inspection of fiber optic lines to check for damage, aging, deformation, etc., clarity of markings, and the presence of construction or other factors that may affect line safety.
2. Fiber optic connection equipment inspection: Check if the fiber optic distribution frame (ODF) cabinet door is closed, markings are clear, fiber optic connectors are loose or oxidized, and fiber optic adapters and couplers are working properly.
3. Fiber optic transmission equipment inspection: Check the indicator light status of optical terminal equipment, fiber optic transceivers, wavelength division multiplexing (WDM)/dense wavelength division multiplexing (DWDM) equipment, and optical amplifiers, etc. Check the operating temperature, fan operation, and listen for any unusual sounds.
4. Fiber optic terminal equipment inspection: Check the operating status of optical network units (ONU) and optical line terminals (OLT), check for alarm messages, and ensure that the equipment is operating normally.

Regular Inspection

1. Monthly Inspection
   • Fiber optic line inspection: Use an optical time-domain reflectometer (OTDR) to conduct sampling tests on some important fiber optic lines to measure parameters such as fiber attenuation, loss, and length, and analyze fiber performance changes.
   • Fiber optic connection equipment inspection: Measure the insertion loss of fiber optic connectors using an optical power meter, check the performance of fiber optic adapters and couplers, and replace problematic connection equipment.
   • Fiber optic transmission equipment inspection: Conduct performance tests on optical terminal equipment, fiber optic transceivers, wavelength division multiplexing (WDM)/dense wavelength division multiplexing (DWDM) equipment, optical amplifiers, etc., including measurement of parameters such as optical power, wavelength, gain, and noise figure.
   • Fiber optic terminal equipment inspection: Conduct data transmission performance tests on optical network units (ONU) and optical line terminals (OLT), checking indicators such as bit error rate and bandwidth utilization.
2. Quarterly Inspection
   • Comprehensive fiber optic line inspection: Use OTDR to conduct a comprehensive inspection of all fiber optic lines, record detailed fiber performance parameters, and establish fiber optic line files.
   • Comprehensive fiber optic connection equipment inspection: Clean, inspect, and test all fiber optic connection equipment, replacing aged or damaged equipment.
   • In-depth fiber optic transmission equipment inspection: Conduct in-depth inspection of fiber optic transmission equipment, including inspection of internal circuits, optical modules, and other components, and perform software upgrades and parameter optimization.
   • Fiber optic terminal equipment function inspection: Conduct functional testing of optical network units (ONU) and optical line terminals (OLT), including checks on port configuration and service activation.
3. Annual Inspection
   • Fiber optic equipment performance evaluation: Analyze and summarize the detection data for the entire year, evaluate the overall performance and operating status of the fiber optic equipment, and develop the maintenance plan for the next year.
   • Fiber optic equipment aging assessment: Assess the degree of aging of fiber optic equipment and develop an equipment renewal plan based on the assessment results.
   • Fiber optic network security inspection: Conduct a comprehensive security inspection of the fiber optic network, including checks on network topology, device access control, and data encryption, to ensure the security of the fiber optic network.

Special Period Inspection

1. Before major holidays, events, or peak communication periods, conduct comprehensive inspections and maintenance of fiber optic equipment to ensure it can meet high-load communication demands.
2. After severe weather (such as heavy rain, strong winds, lightning, etc.), conduct emergency inspections of fiber optic equipment, focusing on checking fiber optic lines for damage and promptly repairing damaged equipment.

VI. Inspection and Maintenance Methods

1. Visual Inspection: Visually inspect the fiber optic equipment for physical damage, deformation, aging, etc.
2. Performance Testing: Use professional testing instruments (such as OTDR, optical power meters, optical spectrum analyzers, etc.) to test various performance parameters of fiber optic equipment and obtain equipment performance data.
3. Functional Verification: Verify the functions of the fiber optic equipment to ensure that the equipment can normally perform its designed functions.
4. Cleaning and Maintenance: Regularly clean fiber optic equipment, removing dust and dirt from the surface, and maintain key components to extend the service life of the equipment.
5. Fault Diagnosis and Repair: When fiber optic equipment malfunctions, determine the cause of the fault by analyzing fault phenomena and testing equipment performance, and take appropriate repair measures to promptly eliminate the fault.

VII. Fault Handling Process

1. Fault Report: When a fiber optic equipment fault is detected, on-site maintenance personnel should immediately report the fault situation to the monitoring center, including fault phenomena, location, and scope of impact.
2. Fault Diagnosis: After receiving the fault report, the monitoring center should immediately organize professional technicians to analyze and diagnose the fault, determining the cause and type.
3. Fault Handling: Based on the fault diagnosis results, develop a fault handling plan and dispatch maintenance personnel to the fault site for handling. For urgent faults, emergency measures should be taken immediately to restore normal equipment operation as soon as possible.
4. Fault Repair Verification: After fault handling, test and verify the equipment to ensure it has resumed normal operation and the fault has been completely resolved.
5. Fault Record and Summary: Maintain detailed records of the fault handling process, including the cause, method, and time. Regularly analyze and summarize fault records, summarizing lessons learned, proposing improvements, and preventing similar faults from recurring.

VIII. Maintenance Tools and Materials

1. Testing Tools: Optical Time-Domain Reflectometer (OTDR), optical power meter, optical spectrum analyzer, fiber optic fusion splicer, fiber optic microscope, fiber optic cleaning tools, etc.
2. Maintenance Materials: Fiber optic patch cords, fiber optic adapters, fiber optic couplers, optical modules, pigtails, fiber optic protective tubes, etc.

IX. Safety Measures

1. Maintenance personnel should strictly adhere to safe operating procedures and wear necessary safety protective equipment when performing fiber optic equipment inspection and maintenance work.
2. When performing operations such as fiber optic splicing, care should be taken to prevent laser damage to the eyes.
3. When performing energized operations on fiber optic equipment, necessary anti-static measures should be taken to prevent static electricity from damaging the equipment.
4. When constructing fiber optic lines, clear warning signs should be set up to prevent accidents involving construction personnel and passers-by.

X. Cost Budget

1. Personnel Costs: Includes wages, bonuses, and benefits for inspection and maintenance personnel.
2. Tool and Material Costs: Purchase, update, and maintenance costs of inspection and maintenance tools, as well as procurement costs of maintenance materials.
3. Training Costs: Costs for team members to participate in professional training.
4. Transportation and Communication Costs: Transportation costs for maintenance personnel to travel to the fault site, as well as communication costs.
5. Other Costs: Includes equipment rental fees, office expenses, etc.

XI. Effectiveness Evaluation

1. Establish a regular effectiveness evaluation mechanism to evaluate the implementation effectiveness of the fiber optic equipment inspection and maintenance plan.
2. Evaluation indicators include equipment failure rate, business interruption time, and user satisfaction.
3. Based on the evaluation results, adjust and improve the inspection and maintenance plan in a timely manner to continuously improve the operation and maintenance level of fiber optic equipment.