By Stephen B. Weinstein
ISBN-10: 0470168846
ISBN-13: 9780470168844
The ComSoc consultant to Passive Optical Networks offers readers with a concise clarification of the main good points of Passive Optical Networks (PONs); the differing kinds of PON architectures and criteria; key problems with PON units, administration, and implementation; and the promising enterprise possibilities in entry networks. Written for a vast viewers, starting from builders to clients, this crucial booklet presents an figuring out o the evolutionary direction of PON entry structures and their positioning with recognize to the cable, copper, and instant rivals for broadband entry networks.
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Extra info for The ComSoc Guide to Passive Optical Networks: Enhancing the Last Mile Access
Sample text
Com/services/testing/integrated-access/pon/ [XG-PON] F. Effenberger, H. Mukai, S. Park, & T. Pfeiffer, “Next-generation PONPart II: Candidate systems for next-generation PON,” IEEE Commun. Magazine, November, 2009, pp. 50–57. [YEH] C. -S. Lee, & S. Chi, “A protection method for ring-type TDM-PONs against fiber fault,” Prof. IEEE-OSA Optical Fiber Communication Conference 2007, paper JThA76. info 3 TECHNIQUES AND STANDARDS This chapter focuses on the three main passive optical network (PON) technologies and standards: broadband passive optical network (BPON), gigabitcapable passive optical network (GPON), and Ethernet passive optical network (EPON), which were introduced in the previous chapter.
Troubleshooting identifies the location and the source of a particular problem. Generally speaking, if a problem occurs in the shared part, such as the OLT, feeder fiber, or splitter, all subscribers will be affected. 7 Access network Feeder fiber 4 5 PON troubleshooting zones. 21 ONU Access network or LAN/WAN Feeder fiber 2 3 4 5 Troubleshooting using an optical power meter (OPM). fiber or an ONU/ONT, the affected subscribers are essentially those downstream from the failed part. 20, the PON system is segmented into five troubleshooting zones.
The jumps in this example correspond to the IL of various components, and the large reflection peak suggests Fresnel reflections at the fiber termination. Unfortunately, a PON will return traces from multiple branches, whose overlapping traces can make it very difficult to diagnose a problem in a particular branch. The many approaches to isolating traces from the different branches include [RAD] • temporal isolation of branches, through the differing response times from different lengths of fiber to the different ONUs together with selective use of reflectors at each ONU; and • use of one monitoring wavelength for each branch.