vb.net qr code Players and Futures in the SONET/SDH Game in Software

Printing USS Code 39 in Software Players and Futures in the SONET/SDH Game

Players and Futures in the SONET/SDH Game
Code-39 Reader In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Create Code 3/9 In None
Using Barcode generation for Software Control to generate, create Code-39 image in Software applications.
Figure 6-4 A two-fiber ring.
Scan Code 39 Extended In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Make Code-39 In C#
Using Barcode creator for VS .NET Control to generate, create Code 3/9 image in .NET framework applications.
6
Paint Code 39 Full ASCII In Visual Studio .NET
Using Barcode generator for ASP.NET Control to generate, create Code39 image in ASP.NET applications.
Printing Code 3/9 In VS .NET
Using Barcode printer for VS .NET Control to generate, create Code 3 of 9 image in .NET framework applications.
Figure 6-5 Ring wraps following breached fiber.
Code 39 Full ASCII Creation In VB.NET
Using Barcode drawer for .NET framework Control to generate, create Code 39 image in .NET applications.
Code 39 Full ASCII Printer In None
Using Barcode maker for Software Control to generate, create Code-39 image in Software applications.
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
Data Matrix Drawer In None
Using Barcode printer for Software Control to generate, create ECC200 image in Software applications.
GTIN - 12 Generator In None
Using Barcode printer for Software Control to generate, create GTIN - 12 image in Software applications.
Players and Futures in the SONET/SDH Game
EAN 13 Maker In None
Using Barcode creation for Software Control to generate, create EAN-13 image in Software applications.
Barcode Generator In None
Using Barcode printer for Software Control to generate, create barcode image in Software applications.
Players and Futures in the SONET/SDH Game
USD - 8 Creator In None
Using Barcode encoder for Software Control to generate, create USD - 8 image in Software applications.
Make UPCA In VS .NET
Using Barcode drawer for .NET Control to generate, create UPC A image in Visual Studio .NET applications.
Two-fiber rings can also be configured in such a way that active traffic travels on both rings simultaneously. This is known as a Bidirectional Line Switched Ring (BLSR). Let s assume that our ring is carrying 16 SONET STS or SDH STM channels. In a BLSR configuration, eight of the channels would travel on the clockwise ring, while eight would travel in the opposite direction on the counter-clockwise ring. Under normal operating circumstances, any single payload component would simply travel from the originating multiplexer to the terminating multiplexer, as shown in Figure 6-6. Should a failure of both rings occur between two multiplexers, the ring would wrap, as shown in Figure 6-7. Note that the result is the same: the traffic will take longer to reach its destination (which could be a problem for some applications), but it will reach the destination nonetheless. Be aware that the only devices that are aware of the nature of the failure in this situation are the two multiplexers on either side of the fiber cut that have to respond to the failure. Four-fiber rings, on the other hand, rely on a slightly different architecture, shown in Figure 6-8. A four-fiber ring offers greater, more varied flexibility. For example, let us assume that fibers A and B are serving as the active path, while fibers C and D are serving as the backup. Because of added capacity, we can now transport 16 channels on the clockwise path (A) and 16 more in the counter-clockwise direction (B), as shown in Figure 6-9.
Code 128 Code Set A Maker In .NET Framework
Using Barcode creator for ASP.NET Control to generate, create Code128 image in ASP.NET applications.
Painting Code 39 Full ASCII In None
Using Barcode generation for Microsoft Excel Control to generate, create Code39 image in Excel applications.
Figure 6-6 Shared bandwidth across two rings.
ECC200 Creator In None
Using Barcode encoder for Font Control to generate, create Data Matrix ECC200 image in Font applications.
Print UPC-A Supplement 5 In None
Using Barcode generator for Online Control to generate, create UPC A image in Online applications.
Eight Payload Channels, Clockwise
ANSI/AIM Code 39 Maker In Visual Studio .NET
Using Barcode printer for .NET framework Control to generate, create Code 39 Full ASCII image in Visual Studio .NET applications.
Code-128 Printer In None
Using Barcode generator for Online Control to generate, create Code-128 image in Online applications.
Eight Payload Channels, Counterclockwise
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
Players and Futures in the SONET/SDH Game
Figure 6-7 Ring recovery.
6
Figure 6-8 A four-fiber ring.
Fibers A&B
Fibers C&D
Paths C and D remain quiescent. In this case, a payload component would travel from the originating multiplexer to the terminating multiplexer in a relatively linear fashion around the ring, as shown in Figure 6-10.
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
Players and Futures in the SONET/SDH Game
Players and Futures in the SONET/SDH Game
Figure 6-9 Shared bandwidth across a four-fiber ring.
16 Channels, Counterclockwise 16 Channels, Clockwise
Figure 6-10 Normal path through a four-fiber ring.
Should the two primary fibers fail, as shown in Figure 6-11, the ring recovers in exactly the same way the two-fiber ring did by routing traffic to the backup span, but only to avoid the failed area. Again, only the devices on either end of the failure are aware that the failure has occurred. Should all four fibers fail, as illustrated in Figure 6-12, the BLSR has the capability to recover. In this case, the active and protect spans work
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
Players and Futures in the SONET/SDH Game
Figure 6-11 Traffic moves to backup spans.
6
Traffic moves to backup spans
Figure 6-12 Four-fiber ring wraps.
Ring wraps on either side of failure points
together to route around the failure point, converting the ring into a toroidal shape and guaranteeing survivability and traffic delivery. Ring architectures, then, provided a significant improvement over dedicated, point-to-point designs in terms of flexibility, survivability, customer
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
Players and Futures in the SONET/SDH Game
Players and Futures in the SONET/SDH Game
service, and revenue protection. Furthermore, as optical technology advanced, the bandwidth available over a ring grew from 2.5 Gbps to 10 Gbps to 40 Gbps (and potentially beyond). Furthermore, the addition of DWDM to an otherwise pure SONET or SDH ring added yet another layer of transport capability that dramatically multiplied the overall capacity of the architecture. This became particularly valuable with the increasing focus on metropolitan applications.
Copyright © OnBarcode.com . All rights reserved.