how to make barcodes in excel mac 2011 Figure 1710 Offsetting ofSPE related to frame boundary in Software

Creation Code 39 Full ASCII in Software Figure 1710 Offsetting ofSPE related to frame boundary

Figure 1710 Offsetting ofSPE related to frame boundary
Printing Code 39 Extended In None
Using Barcode generation for Software Control to generate, create Code 3 of 9 image in Software applications.
Recognize Code39 In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Data
Code 39 Full ASCII Creation In C#
Using Barcode maker for VS .NET Control to generate, create Code-39 image in .NET applications.
Code39 Maker In Visual Studio .NET
Using Barcode printer for ASP.NET Control to generate, create Code 3 of 9 image in ASP.NET applications.
r-r-r-r--
Code39 Drawer In .NET Framework
Using Barcode maker for Visual Studio .NET Control to generate, create Code 3 of 9 image in .NET framework applications.
Code39 Generation In Visual Basic .NET
Using Barcode maker for VS .NET Control to generate, create Code-39 image in Visual Studio .NET applications.
Frame 1+1 Frame flow Frame
Printing ECC200 In None
Using Barcode encoder for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
Drawing EAN13 In None
Using Barcode printer for Software Control to generate, create European Article Number 13 image in Software applications.
To find the beginning of each SPE in a frame, we need two pointers HI and H2 in the line overhead Note that these pointers are located in the line overhead because the encapsulation occurs at a multiplexer Figure 1711 shows how these 2 bytes point to
Draw ANSI/AIM Code 39 In None
Using Barcode drawer for Software Control to generate, create Code39 image in Software applications.
Making Code 128A In None
Using Barcode printer for Software Control to generate, create Code 128 image in Software applications.
Figure 1711 The use of Hi and H2 pointers to show the start of an SPE in aframe
Bar Code Maker In None
Using Barcode drawer for Software Control to generate, create barcode image in Software applications.
UPC-A Printer In None
Using Barcode encoder for Software Control to generate, create UPCA image in Software applications.
Framei+l Frame flow
Code11 Generation In None
Using Barcode maker for Software Control to generate, create Code 11 image in Software applications.
UPCA Creation In Java
Using Barcode printer for BIRT reports Control to generate, create UPC Code image in BIRT reports applications.
SECTION 174
EAN / UCC - 13 Creation In Objective-C
Using Barcode drawer for iPad Control to generate, create EAN13 image in iPad applications.
EAN-13 Supplement 5 Printer In None
Using Barcode encoder for Font Control to generate, create EAN 13 image in Font applications.
STS MULTIPLEXING
Creating Bar Code In Java
Using Barcode creator for BIRT reports Control to generate, create bar code image in Eclipse BIRT applications.
Code 39 Extended Maker In Java
Using Barcode encoder for Android Control to generate, create Code39 image in Android applications.
the beginning of the SPEs Note that we need 2 bytes to define the position of a byte in a frame; a frame has 810 bytes, which cannot be defined using 1 byte Example 175
Bar Code Maker In .NET
Using Barcode drawer for Reporting Service Control to generate, create bar code image in Reporting Service applications.
Generating Code 128C In None
Using Barcode creation for Microsoft Excel Control to generate, create Code 128 image in Office Excel applications.
What are the values of HI and H2 if an SPE starts at byte number 650
Solution
The number 650 can be expressed in four hexadecimal digits as Ox028A This means the value of HI is Ox02 and the value of H2 is Ox8A
Justification Now suppose the transmission rate of the payload is just slightly different from the transmission rate of SONET First, assume that the rate of the payload is higher This means that occasionally there is 1 extra byte that cannot fit in the frame In this case, SONET allows this extra byte to be inserted in the H3 byte Now, assume that the rate of the payload is lower This means that occasionally 1 byte needs to be left empty in the frame SONET allows this byte to be the byte after the H3 byte
STS MULTIPLEXING
In SONET, frames of lower rate can be synchronously time-division multiplexed into a higher-rate frame For example, three STS-l signals (channels) can be combined into one STS-3 signal (channel), four STS-3s can be multiplexed into one STS-12, and so on, as shown in Figure 1712 Figure 1712 STS multiplexing/demultiplexing
----+s;rs:Jc+----1 STS
STS-3
STS t----t&TSl1--DEMUX
Multiplexing is synchronous TDM, and all clocks in the network are locked to a master clock to achieve synchronization
In SONET, all clocks in the network are locked to a master clock
We need to mention that multiplexing can also take place at the higher data rates For example, four STS-3 signals can be multiplexed into an STS-12 signal However, the STS-3 signals need to first be demultiplexed into 12 STS-l signals, and then these
CHAPTER 17 SONETISDH
twelve signals need to be multiplexed into an STS-I2 signal The reason for this extra work will be clear after our discussion on byte interleaving
Byte Interleaving
Synchronous TDM multiplexing in SONET is achieved by using byte interleaving For example, when three STS-I signals are multliplexed into one STS-3 signal, each set of 3 bytes in the STS-3 signal is associated with 1 byte from each STS-I signal Figure 1713 shows the interleaving Figure 1713 Byte interleaving
STS-l
270 bytes
90 bytes
Note that a byte in an STS-I frame keeps its row position, but it is moved into a different column The reason is that while all signal frames have the same number of rows (9), the number of columns changes The number of columns in an STS-n signal frame is n times the number of columns in an STS-I frame One STS-n row, therefore, can accommodate all n rows in the STS-I frames Byte interleaving also preserves the corresponding section and line overhead as shown in Figure 1714 As the figure shows, the section overheads from three STS-l frames are interleaved together to create a section overhead for an STS-l frame The same is true for the line overheads Each channel, however, keeps the corresponding bytes that are used to control that channel In other words, the sections and lines keep their own control bytes for each multiplexed channel This interesting feature will allow the use of add/drop multiplexers, as discussed shortly As the figure shows, there are three Al bytes, one belonging to each of the three multiplexed signals There are also three A2 bytes, three B 1 bytes, and so on Demultiplexing here is easier than in the statistical TDM we discussed in 6 because the demultiplexer, with no regard to the function of the bytes, removes the first A 1 and assigns it to the first STS-I, removes the second AI, and assigns it to second STS-l, and removes the third Al and assigns it to the third STS-I In other words, the demultiplexer deals only with the position of the byte, not its function What we said about the section and line overheads does not exactly apply to the path overhead This is because the path overhead is part of the SPE that may have splitted into two STS-I frames The byte interleaving, however, is the same for the data section of SPEs
Copyright © OnBarcode.com . All rights reserved.