March 2008
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Telephone technologyNovember 2022Voice over IP
An Introduction to Techniques with SIP
by Thomas Wübbe
Since the switch-off of classic telephony technology in 2019, the Session Initiation Protocol (SIP) dominates providers' telephony solutions. This book gives an introduction to this technology. It shows principles as well as the common architecture of Voice over IP with SIP. In addition to differences and changes to the "old" telephone technology, step-by-step methods and requirements for Voice over IP are discussed.Many protocol examples show how SIP works. They help troubleshooting when something does not work. A special practical chapter shows how to do analyses via Wireshark and explains logging in detail. These topics are included: Fundamentals of packet switching and standardization, Internet Protocol (IP) VoIP principle, Architecture of SIP SIP signaling Session Description Protocol (SDP) VoIP and NAT Quality of Service (QoS) Introduction to packet analysis with Wireshark, and Practical exercises.
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Thriller / suspenseThe Ludlum Prediction
by Quentin Cope
The Ludlum Prediction It’s the year 2018. North Platte, Lincoln County is a place noted for declining employment prospects at the once famous railroad depot ... and little else. For Ed Ludlum, he could reside anywhere and still earn a good living as a ‘Data Miner’ ... someone who cannot only tell you what you’ll shop for next Wednesday at three o’clock, but which shop you’ll use ... and what shelf you’ll find it on. However, a powerful, wealthy and well connected US based secretive religious sect, the Messianic Tribes of Yashoa, known by many simply as the MTY, wish to avail themselves of Ed Ludlum’s unique services ... and they are willing to pay well for it. They want to extract a date and a place from hundreds of terabytes of data, collected over many years from the darkest depths of some ancient sciences and leftover mysterious hieroglyphs, abandoned by long lost civilisations. But what is all this high tech computer based research for? The work of Ed Ludlum soon comes to the attention of some of the most powerful Intelligence Agencies in the world, such as the CIA, the British SIS and the much feared Israeli Mossad, becoming known as ‘The Ludlum Prediction’ ... a prophesy that if fulfilled, could possibly change the world as we know it ... forever! Sitting on the sidelines, surrounded by Vatican based Cardinals whose common survival plan is based on ignorance and self serving edicts, is one man with the power and determination to thwart the best laid plans of highly professional State Intelligence Agents. He knows that if ‘The Ludlum Prediction’ is in any way linked to the expected appearance of a new prophet, or religious deity, then the Catholic Church could be led to the edge of a credibility precipice. Has Ed Ludlum got it right? With the surprise discovery of 3000 year old tablets linking two great civilisations and key religious beliefs together ... half a world apart ... he thinks he has. However, the very best of carefully executed plans can fail, as they did, so horrifically in the chilling final hours of what was to be the end game adventure, played out on a remote Tibetan plateau ... only miles from the militarily sensitive Chinese border. Will this bring an end to all the speculation and questions of legitimacy surrounding ‘The Ludlum Prediction’, or trigger a new series of events that could inevitably lead to the beginning of a new world crisis? Perhaps there is something even more sinister afoot, urging Ludlum down a path ... to a place ... from which there will be no possible return! Could The Ludlum Prediction in fact be reality? Is it about to happen ... or, more concerning ... could it have happened already? You decide..!
