Overview
ISO/IEC 9314-9:2000 - Information technology - Fibre Distributed Data Interface (FDDI) - Part 9: Low-cost fibre physical layer medium dependent (LCF-PMD) - defines the lower sublayer requirements for a low-cost fibre optic medium used in FDDI token‑ring networks. The standard specifies optical transmitter and receiver characteristics, media and cabling interfaces, connector footprints (LCF‑MIC), signal and jitter requirements, and test methods to ensure interoperable 100 Mbit/s fibre connections.
Key topics and technical requirements
- Physical layer PMD definition: Requirements for the LCF‑PMD sublayer that supports the FDDI Physical Layer (PL).
- Optical transmitter and receiver characteristics: Power levels, spectral properties and receiver sensitivity parameters necessary for reliable 100 Mbit/s links.
- Interface signals and jitter: Optical signal requirements including jitter budgets and measurement considerations to meet token‑ring timing and data integrity.
- Connector and mechanical specs: LCF‑MIC plug/receptacle footprint, mechanical-optical requirements, insertion/withdrawal forces and repeatability testing.
- Cabling and fibre types: Specified fibre classes, bandwidth and attenuation limits, splice/connector loss guidance and alternative cabling usage.
- Station bypass and labelling: Bypass interface behavior and station identification conventions for campus, intra‑building and workstation distribution environments.
- Conformance and test methods: Informative annexes covering optical power/spectrum tests, jitter/distortion measurements, connector testing, loss budgets and example jitter allocation.
- Interoperability parameters: Permissible bit error rates and practical loss budgets to achieve network reliability (values specified in the standard).
Applications and who uses it
- Network architects and campus IT: Designing multi-kilometer, high‑performance token‑ring fibre networks (100 Mbit/s) across campuses or buildings.
- Hardware and transceiver manufacturers: Implementing compliant optical transmitters/receivers, LCF‑MIC connectors and PMD interfaces for FDDI equipment.
- Cabling contractors and integrators: Selecting fibre types, connectors, and performing loss/jitter validation to meet FDDI LCF‑PMD requirements.
- Test labs and certification bodies: Performing conformance testing, optical/jitter measurements and connector mechanical tests per annexes.
- Legacy system maintainers: Supporting or migrating existing FDDI installations where low‑cost fibre PMD remains relevant.
Related standards
- ISO/IEC 9314 family: PHY (Part 1), MAC (Part 2), PMD (Part 3), Single‑Mode Fibre PMD (Part 4), Station Management (Part 6), and other PMD/ATS/ conformance parts. Use ISO/IEC 9314-9:2000 alongside PHY, MAC and SMT parts for full FDDI system compliance.
Keywords: ISO/IEC 9314-9:2000, FDDI, LCF‑PMD, physical layer, fibre optic, LCF‑MIC connector, 100 Mbit/s, jitter, optical transceiver, cabling specification.
Open preview (PDF)Information technology — Fibre Distributed Data Interface (FDDI) — Part 9: Low-cost fibre physical layer medium dependent (LCF-PMD)
