# Optical fiber Communication system

- [What is Optical fiber Communication system](/university-notes/optical-fiber-communication-system/what-is-optical-fiber-communication-system.md)
- [Prepare](/university-notes/optical-fiber-communication-system/what-is-optical-fiber-communication-system/optical-fiber.md)
- [Something About Optical fiber](/university-notes/optical-fiber-communication-system/what-is-optical-fiber-communication-system/something-about-optical-fiber.md)
- [Passive Optical Devices](/university-notes/optical-fiber-communication-system/what-is-optical-fiber-communication-system/passive-optical-devices.md)
- [Active Optical Devices](/university-notes/optical-fiber-communication-system/what-is-optical-fiber-communication-system/active-optical-devices.md)
- [Optical transmitter Test](/university-notes/optical-fiber-communication-system/what-is-optical-fiber-communication-system/optical-transmitter-test.md)
- [Optical receiver Test](/university-notes/optical-fiber-communication-system/what-is-optical-fiber-communication-system/optical-receiver-test.md)
- [Compose an Optical Communication System](/university-notes/optical-fiber-communication-system/what-is-optical-fiber-communication-system/compose-an-optical-communication-system.md)
- [SDH (Synchronous Digital Hierarchy)](/university-notes/optical-fiber-communication-system/sdh-synchronous-digital-hierarchy.md)
- [Frame Structure of SDH](/university-notes/optical-fiber-communication-system/sdh-synchronous-digital-hierarchy/frame-structure-of-sdh.md)
- [SDH Equipments](/university-notes/optical-fiber-communication-system/sdh-synchronous-digital-hierarchy/hardware-of-sdh-system.md)
- [Clock System](/university-notes/optical-fiber-communication-system/sdh-synchronous-digital-hierarchy/clock-system.md)
- [ZXONM E300 Practice](/university-notes/optical-fiber-communication-system/sdh-synchronous-digital-hierarchy/zxonm-e300-practice.md)
- [SDH protection](/university-notes/optical-fiber-communication-system/sdh-synchronous-digital-hierarchy/sdh-protection.md)
- [WDM (Wavelength-Division Multiplexing)](/university-notes/optical-fiber-communication-system/wdm-wavelength-division-multiplexing.md)
- [OTN (Optical Transport Network)](/university-notes/optical-fiber-communication-system/otn-optical-transport-network.md)
- [OverHead of OTN](/university-notes/optical-fiber-communication-system/otn-optical-transport-network/overhead-of-otn.md)
- [OTN Alarms & Errors](/university-notes/optical-fiber-communication-system/otn-optical-transport-network/otn-alarms-and-errors.md)
- [Do it again, what's happened?](/university-notes/optical-fiber-communication-system/otn-optical-transport-network/do-it-again-whats-happened.md)