Data Communications Networking Devices - 4th Ed.pdf

1.11 TRANSMISSION CODES _______________________________________________________ 43Table 1.9EBCIDIC code implemented for the IBM 3270 information display systemThe primary difference between the ASCII character set listed in Table 1.10and other versions of the ITU International Alphabet Number 5 is the currencysymbol. Although the bit sequence 0100010isused to generate the dollar $)currency symbol in the United States,in the United Kingdom that bit sequenceresults in the generation of the pound sign £). Similarly,this bit sequencegenerates other currency symbols when the ITU International Alphabet Number5 is used in other countries.Extended ASCIIMembers of the IBM PC series and compatible computers use an extended ASCIIcharacter set which is represented as an 8-level code. The ®rst 128 characters in thecharacter set,ASCII values 0 through 127,correspond to the ASCII character setlisted in Table 1.10 while the next 128 characters can be viewed as an extension ofthat character set since they require an 8-bit representation.Caution is advised when transferring IBM PC ®les since characters with ASCIIvalues greater than 127 will be received in error when they are transmitted using 7