ABSTRACT
Optical transmission systems provide the lowest loss and highest transmission rate for the broadband network in comparison with other systems. The broadband network is expanding because of the worldwide popularization of the Internet. Broadband networks are only for data communication, not traditional voice communication like the PSTN (public switched telephone network), and involves exchange of digital information between a computer and other digital devices using packet switching. The broadband network system is composed of the local-area network (LAN; office or home), access network (fiber to the home, FTTH), metropolitan network (MAN), wide-area network (WAN; long haul or submarine cable). Figure 12.1 shows an overview of broadband networks. Broadband networks. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315220963/0c7fafc6-99e8-4ab6-a876-8ac6e1ee9367/content/fig12_1.tif"/>
LAN: The LAN interconnects users in a local area, such as a home, a building, an office or factory, a campus, and the like.
Access network: The access network interconnects the LAN and an access point of the metro edge.
MAN: The MAN interconnects a narrow area, such as several building blocks or an entire city and metropolitan area.
WAN: The WAN interconnects neighboring cities, long-distance cities, or across a country.
