November 2016
Intermediate to advanced
452 pages
14h 4m
English
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Appendix A
Data Flow in a PON
Fig. A.1 represents data flow in any passive optical network (PON) or similar systems such as DOCSIS; it applies to just about any point-to-multipoint system. In the downstream direction, the optical line terminal (OLT) puts out continuous data with no gaps. In this simplified diagram, there are three optical network terminal (ONTs), each of which gets its downstream data during a time slot of variable length, depending on how much data is available for that ONT and how much bandwidth the subscriber is allowed. The data for each ONT are preceded by a header (not shown) embedded in its data, which identifies the ONT and usually the port on the ONT which is to receive the data. It is essential that the downstream data ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.