bytes, , [GEN]. Document: ITU-T SG15 (Study Period ) Temporary Document GEN. Title: FTTH Handbook. Download as PDF, TXT or read online from Scribd .. FTTH Handbook 1 Introduction This handbook has been developed to provide an understanding of all the. [BLU 10] BLUETOOTH SIG I., , August [FTT 10b] FTTH, FTTH Handbook, Report, Fiber to the Home Council Europe,

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For example — Bus or linear, distributed splitting, etc. The downstream GTC frame provides the common time reference for the PON and the common control signaling for the upstream. The optical network terminal ONTwhich is connected to the OLT at uplink side for service network interface, has many user-network interface ports.

Fiber to the Home or simply FTTH is a technology that uses optical fiber directly from the central point to the residential premises as shown in the following image.

FTTH Handbook – Fifth Edition – Gpondoctor

The mean signal transfer delay is the average of the upstream and downstream delay values between reference points. The important factor is to configure Layer 2 channel for proper forwarding of service data. These are defined by two wavelengths: The same fibers are used simultaneously in both the directions. This choice facilitates high bandwidth services and content to each customer and ensures maximum bandwidth for future demands of new services.

PMD generates electrical or optical signals depending on the nature of the physical medium connected. GEM supports fragmentation and reassembly.

FTTH – Quick Guide

Equipment venders focus on optimizing the function and practicability. Fixed and the second is the Wireless way. Ftth provides uninterrupted high-speed internet service. A product by EFM Ethernet in the first mile. Service is defined as a network service required by the operators. For downstream trafficthe traffic multiplexing functions are centralized in OLT.


The GPON ODN, consisting of a single mode optical fiber and cable; the optical fiber ribbon cables, splices, optical connectors, passive optical splitters and passive branching components are very passive. The ODN optical splitters divide the single fiber into multiple fibers going to different buildings and individual homes.

Physical reach is defined as the maximum physical distance that can be achieved for a particular transmission system.

Downstream traffic broadcasts to all ONUs, so it becomes easy for a malicious user to reprogram ONU and capture desired frames. Green field is used handbooj a complete new deployment is required, whereas in the Brownfield deployment, existing infrastructure will be used.

Ethernet has proven over time to be the ideal transporter for IP traffic. It is the interface between PMD and the physical media.

FTTH Quick Guide

It allows multiple DTE mixed with a variety of implementations tfth the speed gigabit physical layer. Service is described by a name that is clearly recognized by everyone, regardless of whether it is a frame structure name or a general name.

Split ratios of up to 1: Constant length frames facilitate QoS for time-sensitive applications. PON and fiber infrastructure can also be used for supporting any one-way distributive service.

Each ONT gets an exclusive wavelength and enjoys the bandwidth resources of the wavelength. MAC control protocol was specified to support and new functions to be implemented and added to the standard at handbooj same time.

To break down the bandwidth hurdle of the access over twisted pair cables, it supports high-bandwidth transmission. Besides, the simple topology shown in the following illustration, PON can work in other topologies. The current mass FTTH deployment is based on the passive method. This group was restricted to study the G.


SHDSL stands for symmetric high bit rate digital subscriber line. Upstream traffic has not been exposed to other Handbiok, so encryption is not needed. In GPON, two options are defined for the physical reach: For example, Un-fragmented Ethernet frame as shown in the following illustration. The TV signals derived from a satellite Head End are optionally broadcast on a third optical wavelength of nm on same or additional fiber introduced into the FTTx system through an RF Overlay sub-system.

There is a complexity of using colored optical transceivers, which processing service is provisioning and devising storage. In case, when copper network needs to be replaced with the fiber network, then it will be considered under the Green Field Network, as the existing network will be replaced with the new network completely.

The bandwidth allocations to different Alloc-IDs are multiplexed in time as specified by the OLT in the bandwidth maps transmitted downstream.

Fttu Point-to-multipoint fiber provides relatively high bandwidth at a lower cost. The PMA provides an independent middle way for PCS to support the use of a range of bit-oriented physical media series. Refer the following image. Active Method and Passive Method. However, anticipating the continued evolution of optical modules, the TC layer must consider split ratios up to 1: