After ADSS (All-Dielectric Self-Supporting) cable installation, comprehensive testing and commissioning are crucial steps to verify the optical performance of the fiber network and the mechanical integrity of the cable and its hardware. This ensures the system is ready for reliable long-term operation.

I. Optical Testing and Commissioning (Fiber Optic Performance):

• 1. Optical Time Domain Reflectometer (OTDR) Testing:

  • Purpose: The most critical optical test. An OTDR acts like a "radar" for fiber, sending light pulses down the fiber and analyzing the reflected light to measure:

    • Total Fiber Length: Verifies the installed length.

    • Optical Loss: Identifies and quantifies loss at splices, connectors, and along the cable itself.

    • Event Location: Pinpoints the exact location of splices, connectors, and any anomalies (e.g., micro-bends, macro-bends, breaks, poor connections).

    • Reflectance: Measures reflections from connectors or faults.

  • Procedure: Performed bi-directionally (from both ends) for each individual fiber in the ADSS cable, at multiple wavelengths (typically 1310 nm and 1550 nm for single-mode fiber). Results are documented as "as-built" records.

• 2. Optical Power Meter (OPM) and Light Source Testing (Insertion Loss Testing):

  • Purpose: To measure the total end-to-end attenuation (loss) of each fiber link, including all splices and connectors. This confirms the link meets the design's optical loss budget.

  • Procedure: A calibrated light source injects light at one end, and an OPM measures the received power at the other end. Loss is calculated in dB. Performed bi-directionally for each fiber.

• 3. Visual Fault Locator (VFL):

  • Purpose: A simple, red laser light tool for quick continuity checks and identifying macro-bends, breaks, or poor connections in short distances where the red light might escape the fiber jacket.

  • Procedure: Light leakage indicates a problem. Useful for troubleshooting and verifying patch cord connections.

• 4. Fiber End-Face Inspection:

  • Purpose: To ensure that fiber optic connector end-faces (where ADSS is terminated into patch panels) are clean and free from scratches, dust, or defects, which can cause significant optical loss and reflectance.

  • Procedure: Using a fiber inspection microscope or probe. Cleaning is performed if necessary.

• 5. Chromatic Dispersion (CD) and Polarization Mode Dispersion (PMD) Testing:

  • Purpose: For very high-speed (e.g., 10 Gbps and above) and long-haul ADSS networks, these tests measure signal distortion that can limit bandwidth and reach.

  • Procedure: Specialized equipment measures dispersion characteristics.

II. Mechanical and Visual Inspection (Cable and Hardware Integrity):

• 1. Visual Inspection:

  • Purpose: A thorough visual check of the entire ADSS installation to identify any visible mechanical damage to the cable jacket, proper seating of suspension and dead-end hardware, correct sag, and proper down-lead routing.

  • Procedure: Conducted from the ground, binoculars, drones, or bucket trucks. Look for jacket nicks, tight bends, loose hardware, or signs of stress.

• 2. Sag and Tension Verification:

  • Purpose: To confirm that the ADSS cable has been sagged to the correct values specified in the design for the given ambient temperature, ensuring it meets clearance requirements and is not over-tensioned.

  • Procedure: Using optical or laser sagging tools, measure sag in representative spans and compare against the sag chart.

• 3. Hardware Inspection:

  • Purpose: To ensure all ADSS suspension, dead-end, and down-lead hardware is correctly installed, tightened to specifications (if applicable), and providing proper support and protection to the cable jacket.

  • Procedure: Close-up visual inspection from bucket trucks or by climbing crews.

III. Documentation and Reporting:

• All test results (optical and mechanical observations) are meticulously documented, compared against design specifications, and retained as critical "as-built" records. This data is invaluable for future maintenance, troubleshooting, and overall network management. A comprehensive commissioning report is typically submitted to the client.

Our company not only provides the robust ADSS installation equipment but also supports our clients with essential testing solutions and expertise, including advanced fiber optic test equipment and guidance on best practices for mechanical verification, ensuring that every ADSS installation meets the highest standards of performance and longevity.