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. [...]