1. The University of Adelaide, School of Computer Science
22 February 2019
Optical Networks: A Practical Perspective, 3rd Edition
Chapter 8
Control and Management
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Chapter 2 — Instructions: Language of the Computer

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Figure 8.1
Chapter 8
Figure 8.1 Overview of network management in a typical optical network, showing the network elements (OLTs, OADMs, OXCs, amplifiers), the management systems, and
the associated interfaces.
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Figure 8.2
Chapter 8
Figure 8.2 Layers within OTN. The optical layers are the optical channel layer (OCh), optical multiplex section (OMS) layer, and the optical transmission section (OTS) layer. The electronic layers are the optical channel data unit (ODU) layer and the optical channel transport unit (OTU).
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Figure 8.3
Chapter 8
Figure 8.3 Interoperability between WDM systems from different vendors, showing all-optical subnets from different vendors interconnected through transponder/ regenerators.
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Figure 8.4
Chapter 8
Figure 8.4 Forward and backward defect indicator signals and their use in a network.
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Figure 8.5
Chapter 8
Figure 8.5 Using hierarchical defect indicator signals in a network. Defect indicators are used at the OTS, OMS, OCh, and ODU sublayers.
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Figure 8.6
Chapter 8
Figure 8.6 Different types of optical layer overhead techniques. The OSC is used hop by hop. The pilot tone is inserted by a transmitter and can be monitored at elements in an all-optical subnet until it is terminated at a receiver. The rate-preserving overhead is used end to end across multiple subnets
through intermediate regenerators.
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Figure 8.7
Chapter 8
Figure 8.7 The optical supervisory channel, which is terminated at each amplifier location.
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Figure 8.8
Chapter 8
Figure 8.8 Usage of wavelengths in the network. Traffic is carried on the O (original), S (short), C (conventional), or L (long) wavelength bands. Raman pumps, if used, are located about 80–100 nm below the signal.
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Figure 8.9
Chapter 8
Figure 8.9 Different control plane models for interconnecting client layers with the optical layer. (a) Overlay model, (b) overlay+ model, (c) peer model, and (d) augmented model.
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Figure 8.10
Chapter 8
Figure 8.10 Different types of interfaces between a WDM optical network and its clients.
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Figure 8.11
Chapter 8
Figure 8.11 Open fiber control protocol in the Fibre Channel standard.
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Figure 8.12
Chapter 8
Figure 8.12 State machine run by each node for the open fiber control protocol in the Fibre Channel standard.
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Figure 8.13
Chapter 8
Figure 8.13 A combined SONET/WDM optical network for Problem 8.2.
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Figure 8.14
Chapter 8
Figure 8.14 Example for Problem 8.3.
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