DS3 Adaptation Plane DS1 DS1 DS1 DS1 DS1 Switching Plane in VS .NET

Making Data Matrix in VS .NET DS3 Adaptation Plane DS1 DS1 DS1 DS1 DS1 Switching Plane
DS3 Adaptation Plane DS1 DS1 DS1 DS1 DS1 Switching Plane
Reading Data Matrix 2d Barcode In VS .NET
Using Barcode Control SDK for .NET framework Control to generate, create, read, scan barcode image in .NET applications.
Figure 75 DACS
ECC200 Encoder In Visual Studio .NET
Using Barcode creation for Visual Studio .NET Control to generate, create Data Matrix 2d barcode image in Visual Studio .NET applications.
7
Scanning DataMatrix In .NET Framework
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
YET OTHER TRUNKS You still may encounter analog trunks, principally as the physical link between a customer-owned analog PBX and the local end office
Creating Barcode In Visual Studio .NET
Using Barcode creator for Visual Studio .NET Control to generate, create bar code image in .NET framework applications.
physical T1 or T3 may be present, only the provisioned fraction is available to actually carry traffic (six DS0s, for instance, for a total available bandwidth of 384 Kbps even though 1,544 Kbps is physically present) The advantage to the carrier of installing the more capable wire is that when bandwidth demand increases, it can be met by provisioning more circuits from the excess not yet used, as opposed to running another physical installation One of the major roles of the DACS and its descendants is grooming I ve never been exactly sure of the reason for the use of the term, which brings up images of dog and cat shows A better name would probably be trunk packing
Read Bar Code In .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
Grooming
Data Matrix 2d Barcode Encoder In Visual C#
Using Barcode creation for .NET Control to generate, create Data Matrix image in Visual Studio .NET applications.
As mentioned, trunks are logical high-speed bit streams, which may have a oneto-one mapping to the physical transport (for example, DS1 to T1) Multiple trunks also may map to a single physical transport, as is quite common in optical transport systems [for example, multiple SONET signals over a single dense wave-division multiplexing (DWDM) facility] When not attached to elephants, trunks carry user information and may carry signaling information Trunks usually have a connotation of carrying aggregated user channels, and themselves are typically bundled into trunk groups The members of a trunk group, again when not a herd of elephants, provide the same basic signal and speed, which of course may be multiplexed The process of provisioning trunks is not a static one in which the trunk or trunk group never changes once established Carriers routinely groom their channel assignments to trunks to improve the efficiency with which trunk bandwidth is used You can think of it as the bandwidth equivalent to disk defragmentation: reorganizing the allocation of resources so that various chunks are usable again Grooming ensures maximum resource usage, but maximizing resource usage is not necessarily the only goal in providing service Availability is an important goal, and the process of grooming, unless carefully managed, can increase the number of single points of failure For example, carriers often lease additional capacity from other carriers Assume that HugeNet has a customer, BigUser, to whom HugeNet has made extremely high availability guarantees In Figure 76, HugeNet has a physical OC-192 (that is, 10-Gbps) link between San Francisco and Los Angeles, but new business requirements call for 20 Gbps of capacity HugeNet leases another OC-192 from Dietary Fiber HugeNet contractually requires knowing the circuit layout of Dietary
Generate Data Matrix ECC200 In .NET
Using Barcode drawer for ASP.NET Control to generate, create Data Matrix ECC200 image in ASP.NET applications.
The Provider Edge: Layer 1, Layer 2, and the PSTN
Drawing Data Matrix In Visual Basic .NET
Using Barcode drawer for .NET framework Control to generate, create DataMatrix image in VS .NET applications.
Los Angeles
Painting Barcode In VS .NET
Using Barcode maker for .NET Control to generate, create barcode image in Visual Studio .NET applications.
San Francisco
EAN-13 Drawer In .NET Framework
Using Barcode creation for VS .NET Control to generate, create EAN-13 Supplement 5 image in VS .NET applications.
Ownership
Generating Data Matrix 2d Barcode In Visual Studio .NET
Using Barcode printer for .NET Control to generate, create Data Matrix image in .NET framework applications.
HugeNet
ITF-14 Encoder In .NET
Using Barcode generation for VS .NET Control to generate, create UPC Shipping Container Symbol ITF-14 image in VS .NET applications.
Figure 76 The need for extra capacity
GS1 - 12 Creation In Java
Using Barcode printer for Java Control to generate, create UCC - 12 image in Java applications.
Dietary Fiber
Creating Bar Code In VS .NET
Using Barcode generation for ASP.NET Control to generate, create barcode image in ASP.NET applications.
Fiber so that HugeNet can ensure that there is physical route diversity on the San Francisco Los Angeles Path HugeNet previously had a sad experience with a customer circuit, with similar availability requirements, between Los Angeles and Seattle Since HugeNet did not have its own facilities north of Seattle, it leased bandwidth from TreeNet and JavaNet Unfortunately, HugeNet did not know that neither TreeNet nor JavaNet had their own facilities between Portland and Seattle, and both unknowingly leased bandwidth from a common provider, FoggyNet A single backhoe cut to the FoggyNet cable resulted in a single point of failure (Figure 77)
Printing EAN128 In Java
Using Barcode generator for Java Control to generate, create EAN / UCC - 13 image in Java applications.
Los Angeles
Printing Barcode In Java
Using Barcode generation for Java Control to generate, create bar code image in Java applications.
San Francisco
Draw EAN-13 Supplement 5 In VS .NET
Using Barcode generator for ASP.NET Control to generate, create UPC - 13 image in ASP.NET applications.
Portland
Recognizing UPCA In .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
Seattle
Encoding Code 3 Of 9 In Java
Using Barcode encoder for Java Control to generate, create Code 39 Extended image in Java applications.
Ownership HugeNet TreeNet FoggyNet Dietary Fiber JavaNet
EAN / UCC - 13 Generation In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create UCC - 12 image in ASP.NET applications.
Figure 77 Third-party diversity failure
7
HugeNet, however, has to be careful not to inadvertently introduce single points of failure on its own As its capacity requirements grew between Los Angeles and San Francisco, HugeNet very reasonably converted the single OC192 SONET fiber path to SONET over WDM, giving itself, initially, 10 OC-192s where only 1 had existed on the same fiber Naturally, HugeNet s financial planners want to minimize the cost of bandwidth leased from third parties, given the much greater internal capacity To do this, it is completely appropriate to groom most circuits operating over thirdparty facilities onto the HugeNet transport The danger is that automated grooming software, or a provisioning technician unaware of contractual requirements for diverse routing, might groom both of BigUser s paths onto the WDM facility and expose BigUser to a single point of failure HugeNet, even if it reduces its leased bandwidth, still needs to lease some diverse links unless it builds new and diverse facilities of its own Sophisticated users have learned the reality that a given carrier may not always have the necessary diversity fully in place, and that ensuring that diversity is always there is a continuing process Such users very well may want contractual authority to review their circuit layouts at intervals of 60 days or so