Product DescriptionThis book covers all aspects of telephony over IP networks, known as Voice over IP (VoIP). VoIP hit the headlines during the mid-1990′s amid claims concerning its impact upon existing Switched Circuit telephony services. Whilst VoIP has clearly provided a focus for much debate within the telecommunications industry, there has been a clear gulf [...]
Technology has made many changes in the way work is done in an office with computers and other electronic devices undertaking a lot of task which earlier required a human being. The manual work has cut down to a considerable extent and it has become easy to carry out several operations achieving both time and [...]
VoIP, or Voice over Internet Protocol, has only been with us for a relatively short time. Started in 1995 by a small company called Vocaltec, the first Internet phone software used a standard PCs microphone, sound card and speakers to make phone calls to other PCs using the H.323 protocol. Although initially reasonably successful, it [...]
VOIP telephone and voice over ip systems are changing the way people talk on the phone. A VOIP telephone is now helping corporations change their global communications policies and is putting them more in touch with international business partners. A VOIP telephone is changing the way personal users talk to their families and giving [...]
Product DescriptionThe Perfect Reference for the Multitasked SysAdminThis is the perfect guide if VoIP engineering is not your specialty. It is the perfect introduction to VoIP security, covering exploit tools and how they can be used against VoIP (Voice over IP) systems. It gives the basics of attack methodologies used against the SIP and H.323 [...]
Product DescriptionThis book explains why people and companies are converting some or all of their existing (legacy) telephone systems from dedicated telephone systems (such as proprietary PBX) to more standard IP telephony systems. These conversions allow for telephone bill cost reduction, increased ability to control telephone services, and the addition of new telephone information services. [...]