Communications System

Signaling System #7, Fifth Edition (McGraw-Hill Computer Communications Series)
$89.95
The updates to Travis' book are long overdue - MAP, IMS, SIGTRAN. Very good compilation of telecom signaling.

AT&T 974 Small Business System Speakerphone with Intercom and Caller ID/Call Waiting (Titanium Blue)
$129.99
I purchased this phone to replace an older AT&T 2 line phone after I installed 2 more lines. This phone is well made and the buttons are sized nicely and laid out logically. It has plenty of memory storage for frequently dialed numbers. The screen is clear and easily readable. Most importantly, the sound quality is clear and the speaker phone feature works very well. All in all, this is a great phone that can be used as a stand alone or as part of a small office system. When more than one phone is used, the intercom feature become usable. If you are in the market for a small business system that works great, feature rich and at a nice price, this may be it.

Practice of System and Network Administration, The (2nd Edition)
$59.99
If you've been or are planning to be in the hot seat when it comes to running a orginization's computer systems than this book is for you. I read this after being an SA for 12 years for some of the biggest names in the business (IBM, EDS, NetApp, Sprint) and it still has information that's useful to me. I'm no slouch but the fact is that most of us have learned how to do our jobs by feeling pain and working to make that pain go away. This book lets you learn from *others* pain, as well as taking a step back from the "I NEED IT NOW" we all deal with to look in a logical and comprehensive fashion at the many aspects of system administration. I cannot recommend this highly enough.

I don't agree with everything the authors say (I think DDNS is a decent system for most companies for instance), but informed discusion on these topics is a must even if you (as you should) come to your own conclusions. If you're not an SA and you have not read this book chances are you're not doing as good a job as you could be. Seriously.

Fiber-Optic Communication Systems
$140.95
Very good book! It contains a lot of concept about propagation in fiber optic. It's very usefull for people that has just started to study optical communication