Where selection starts
Check equipment requirements before selecting fiber. Review equipment reference, specified fiber grade, wavelength and link distance together; use cable color only as an identification aid.
- Decision to make
- When upgrading an installed link, review retained and new segments together rather than only the new patch cord.
- Record to prepare
- Equipment-requirement matrix and complete link inventory.
Topic-specific checks
- List the equipment-supported fiber grades, operating wavelength and distance requirements together; do not infer compatibility from cable color.
- Inventory installed fiber, connection points and upgrade plans, then confirm the complete link budget with the equipment supplier.
Four-step selection check
- Define the actual interfaces and mating parts at both ends
- Record fiber type, count, channel map and polarity
- Confirm length, bend routing, breakout, jacket and environment
- Agree samples, test method, limits and data format
Evidence to request when sourcing
Request drawings, material boundaries, test methods, sample records and batch traceability that match the purchased revision. Certification marks, performance values and environmental ratings matter only when they map to a specific product revision.
This guide is a selection framework, not a substitute for equipment specifications, applicable standards or the approved project drawing.