Good book is "Voice & Data Communications Handbook" by Bud Bates/Donald
Gregory. 3rd edition is presently out with 4th edition coming out in
October.
http://www.addall.com/New/compare.cgi?dispCurr=USD&id=54995&isbn=0072122765&location=10000&thetime=20010908223215&state=CA
The book is a good analysis up to intermediate level, else, if you already
are comfortable with these protocols I would recommend reading the actuall
specifications. This book is more in depth than the Ulyess Black book (as I
recall looking at it in a book store once).
/julian
>I am trying to learn more about the lower 2 layer tech like
>X.25, ATM, Frame Relay in more detail. Is there any good books
>recommanded? I am reading a book named "emerging communications
>technologies 2nd editon" of Uyless Black, and I think it is only an
>overview of the topics.
>
>Thanks!
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