FOT Lesson: Telecom/Communication engineering project management

FOT Lesson: Telecom/Communication engineering project management

 “Simply put, the telecom/communication construction project is the construction of communication system network and equipment construction, including the erection or laying of communication line optical (electric) cables, the installation and commissioning of communication equipment, and the construction of communication auxiliary facilities.” Telecom/Communication engineering project division Engineering

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The key technology of XG-PON: Physical Medium Dependent (PMD) layer

The key technology of XG-PON: Physical Medium Dependent (PMD) layer

Line rate knowledge   XG-PON defines two line rate levels, which are: XG-PON1—–downstream 10Gbps, uplink 2.5Gbps; XG-PON2—–downstream 10Gbps, uplink 10Gbps.   The current standard only defines the physical layer performance indicators for XG-PON1, and the detailed characteristics of XG-PON2 have not been collected.   The downlink signal

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FOT Lesson: XG-PON certification and security features

FOT Lesson: XG-PON certification and security features

XG-PON’s security threat model introduction When considering the security of XG-PON, you should pay attention to the following threat models: Since the downlink data is broadcasted to all ONUs connected to the OLT, the malicious user can receive downlink data of other users by replacing the ONU

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FOT Lesson: GPON system protocol stack

FOT Lesson: GPON system protocol stack

“GTC: GPON Transmission Convergence; GEM: GPON Encapsulation Method; OMCI: ONU management and control interface; PLOAM: Physical layer OAM; DBA: Dynamic Bandwidth Allocation; GPM/PMD: GPON Physical Medium Dependent; BW: Bandwidth” What is a GPON system protocol stack?   The GPON system is usually consists of the OLT on the

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Learn to choose the right fiber in minutes

Learn to choose the right fiber in minutes

How to select a right optical fiber?   The basic requirement when selecting the optical fiber is that the optical power coupled into the optical fiber from the emitting light source should be large enough, and the distortion generated after the optical signal is transmitted through the

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Graphical illustration of a fiber optic communication system (ii)

Graphical illustration of a fiber optic communication system (ii)

“It can be seen from the following figure that the optical fiber communication system is mainly composed of three parts: an optical transmitter, an optical fiber and an optical receiver…” Composition of optical fiber communication systems   The optical fiber communication system, like all communication systems, consists

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FOT Lesson: Structure of EDFA

FOT Lesson: Structure of EDFA

Structure of EDFA   The structure of the erbium-doped fiber amplifier is shown in the figure below. Its key components are erbium-doped fiber, high-power pump source, wavelength division multiplexer (combiner) that is multiplexed as signal light and pump light, and light feedback and Reduce system noise, optical

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