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Understanding Voice over IP Security (Artech House Telecommunications Library)
VoIP is poised to take over from the century-old public switched telephone network (PSTN). But VoIP telephony does not enjoy the same privacy as the old PSTN. This is because PSTN phone calls were based on establishing a “closed circuit” between the two parties, while VoIP phone calls send packets through the Internet, which... | | Sony Clie for DummiesPut your office and more in the palm of your hand!
Manage contacts, tasks, and appointments, send e-mail, and play games
Your Sony CLIÉ is an amazing gadget, and with this book to guide you, it’ll soon become your best friend. Sure, it keeps your schedule, to-do list, and address book, but did you know it’ll also... | | How to Do Everything with Your Smartphone Kick off your shoes and let How to Do Everything with Smartphone show you the essentials of operation, plus enough Windows mobile add-ons and customization tricks to make you want to 86 your other communications devices. Combine cutting edge PDA technology with wireless communication and use scheduling software, finance and text... |
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| | iMac For Dummies (Computer/Tech)Congratulations! When you bought that shiny new anodized aluminum iMac, you made a great choice. Now you want take advantage and control of that baby's awesome speed, high performance, powerful operating system, and fantastic applications, and iMac for Dummies, 5th Edition is here to help you do just that!
This easy-to-use guide... | | TcL Scripting for Cisco IOS (Networking Technology)
A guide to building and modifying Tcl scripts to automate network administration tasks
Streamline Cisco network administration and save time with Tcl scripting
Cisco networking professionals are under relentless pressure to... |
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