VoIP (voice over IP - that is, voice delivered using the Internet Protocol) is a term used in IP telephony for a set of facilities for managing the delivery of voice information using the Internet Protocol ( IP ). In general, this means sending voice information in digital form in discrete packets rather than in the traditional circuit-committed protocols of the public switched telephone network ( PSTN ). A major advantage of VoIP and Internet telephony is that it avoids the tolls charged by ordinary telephone service.
VoIP, now used somewhat generally, derives from the VoIP Forum, an effort by major equipment providers, including Cisco, VocalTec, 3Com, and Netspeak to promote the use of ITU-T H.323 , the standard for sending voice (audio) and video using IP on the public Internet and within an intranet . The Forum also promotes the user of directory service standards so that users can locate other users and the use of touch-tone signals for automatic call distribution and voice mail.
In addition to IP, VoIP uses the real-time protocol ( RTP ) to help ensure that packets get delivered in a timely way. Using public networks, it is currently difficult to guarantee Quality of Service ( QoS ). Better service is possible with private networks managed by an enterprise or by an Internet telephony service provider (ITSP).
A technique used by at least one equipment manufacturer, Adir Technologies (formerly Netspeak), to help ensure faster packet delivery is to use ping to contact all possible network gateway computers that have access to the public network and choose the fastest path before establishing a Transmission Control Protocol ( TCP ) sockets connection with the other end.
Using VoIP, an enterprise positions a "VoIP device" at a gateway . The gateway receives packetized voice transmissions from users within the company and then routes them to other parts of its intranet (local area or wide area network) or, using a T-carrier system or E-carrier interface, sends them over the public switched telephone network.
Short for Wireless Fidelity and is meant to be used generically when referring of any type of 802.11 network, whether 802.11a, 802.11b, 802.11g and etc. The term is promulgated by the Wi-Fi Alliance.
CAT5 is the 5 th generation of standard Ethernet cabling. CAT5 cables support 100 Mbps networks, run safely up to 100 meters (328 feet), and are cheap. Wireless technology seems to get all the press these days, but you'll still want a trusty CAT5 cable handy for those times when the WLAN is "down" or impractically slow for high-bandwidth applications such as large file transfers and gaming.
ADSL is a form of Digital Subscriber Line (DSL) service that provides greater bandwidth for so-called downstream (from provider to consumer) traffic at the expense of lesser upstream (from consumer to provider) bandwidth.
ADSL takes advantage of the typical pattern of network access on the Web by home users who frequently download large amounts of Web site data but upload relatively small amounts of data.
In other respects, ADSL possesses all of the characteristics one associates with DSL, including an "always on" combination of voice and data services, availability limited by physical distance, and high speed access compared to analog modems. ADSL is technically capable of up to 6 Mbps (roughly 6000 Kbps), but the service customers actually receive generally performs at 2 Mbps or lower for downloads and 512 Kbps for uploads.
The name "Wireless Application Protocol" (WAP) is misleading. WAP is not actually a protocol at all, in the sense that HTTP and IP are protocols. In fact, WAP involves multiple protocols and a complete network architecture for delivery of wireless content.
Intel Pentium 4 processor with HT Technology Extreme Edition
The Intel® Pentium® 4 Processor with HT Technology Extreme Edition. Designed specifically for those who know their technology and crave high performance, this processor is available at 3.20 and 3.40 GHz with an advanced 800 MHz system bus and a whopping 2MB of L3 cache. Built-in Hyper-Threading Technology (HT Technology) † provides immediate value in today's computing environment by enabling the processor to simultaneously execute two software program threads. This lets you run two software applications in parallel without sacrificing performance
Based on Intel NetBurst® microarchitecture and built on Intel's 0.13-micron technology, the Pentium 4 Processor with HT Technology Extreme Edition delivers reliable performance for gamers and power users who demand processing strength to handle today's most advanced applications.
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Hyper-Threading Technology (or HT Technology for short) can provide software performance benefits of up to 25% in multitasking situations, delivering advanced performance for both home and business PC users.
HT technology enhances the PC's ability to run multiple applications at the same time - like playing a game while converting your favorite music files or opening a large presentation while virus scan runs in the background. You don't have to wait for one task to finish before starting the next one, so your computer is more effective, and you are too.
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64 bit Power MAC G5
Speed your work with a dual processor Power Mac G5, available at both 1.8 and 2GHz. The 64-bit G5 processor — plugged into a new ultrahigh-bandwidth system architecture featuring AGP 8X and PCI-X — makes the Power Mac G5 a breakthrough in desktop processing power and lets you use up to 8 gigabytes of main memory.
MAC OS X Panther
Mac OS X has evolved. The fourth major release in just three years, Panther offers breakthroughs in innovation, ease of use and reliability that won't be seen in other operating systems for years, if ever.
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