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High-Tech Dictionary >> VOIP
Word Definition
SCTP (Stream Control Transmission)
A part of SIGTRAN, functions as a transport layer with traffic control mechanism. Defined in RFC 2960, SCTP provides reliable message transfer and enhanced identification of errors.
Session
Session is the duration for which a host is connected to the server for exchanging data packets. Session layers of the network protocol help establish a session between a host and its server.
SIGTRAN (Signaling Transport)
The set of protocols that promotes reliable datagram service. SCTP, the protocol that allows sending traditional telephone calls over IP, is a part of SIGTRAN.
SIP (Session Initiation Protocol)
SIP or Session Initiation Protocol is an IETF (see IETF) standard signaling protocol used for creating, modifying and terminating voice, video and data conferencing over packet-switched networks. VoIP systems incorporate SIP at the application layer to successfully integrate IP telephony with other Internet services. Some of the features of VoIP managed by SIP include call setup, routing, authentication, authorization and communication with different service providers.
Soft keys
Buttons on a telephone handset that users can program themselves to perform certain functions. For example pressing specific keys followed by punching the digits of a telephone number allows programming that number for speed dialing.
Soft phone
VoIP calls can be placed in several ways. You have the option of choosing from a special VoIP telephone, a regular telephone with a VoIP adapter or you can use your computer equipped with microphone, speakers and special software. PC based software solutions for VoIP calling are known as soft phones. These are relatively cheaper, but are not as convenient as VoIP-enabled telephones (hard phones).
Softswitch
A softswitch, an important device to telephone networks, that routes calls from one phone line to another. With the evolution of this technology, the routing happens through computer software. A softswitch has two components called a media gateway and a call agent.
SS7 (Signaling System #7)
A signaling protocol for setting up PSTN calls, defining the way information is exchanged between telephone networks and their individual entities. Defined in 1981 by ITU-T, SS7 in the US is commonly known as Common Channel Signaling System 7 (CCS7).
T1
Traditional phones, mainly in North America, use a T1 connection to transmit voice. Consisting of 24 voice channels, a T1 line supports data rates up to 1.544 Mbits/sec. Many businesses use T1 telecommunication lines to connect to the Internet. Nowadays, T1 lines have several uses apart from traditional phone communication and Internet access. VoIP systems use T1 lines as well. Usually a T1 interface card is used to interface between the IP network and the T1 line.
TAPI (Telephony API)
Telephony Application Programming Interface (TAPI) enables integration of computers with telephone services. With TAPI, computers running Windows facilitate phone services such as call dialing and forwarding. Different versions of Windows support varying TAPI versions. TAPI jointly developed by Microsoft and Intel was introduced in 1993. Most modems and telephony devices are compatible with TAPI.
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Random Words
 
Word : LCD: Liquid Crystal Display
Explanation : Liquid Crystal Display (LCD), used in digital watches and many portable computers, utilizes two sheets of polarizing material with a liquid crystal solution between them. An electric current passed through the liquid causes the crystals to align so that light cannot pass through them. Each crystal, therefore, is like a shutter, either allowing light to pass through or blocking the light.
 
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Tech Word for Today
 Word : EGCS: Experimental/Enhanced GNU Compiler System.
 Explanation : Experimental/Enhanced GNU Compiler System(EGCS) was a compiler system which forked from the GNU Comp
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DVD titling; and digital audio, Adobe Photoshop CS3 extended, Adobe illustrator CS3,Adobe indesign CS3,Adobe Acrobat 8 Professional, Adobe Flash CS3 Professional, Adobe Dreamweaver CS3,Adobe Contribute CS3,Adobe Fireworks CS3,Adobe After Effects CS3 Professional, Adobe Premiere Pro CS3,Adobe Soundbooth CS3,Adobe Encore CS3,Adobe OnLocation,Adobe Bridge CS3,Adobe Version Cue CS3,Adobe Device Central CS3,Adobe Stock Photos, Intel Pentium 4 (1.4GHz processor for DV; 3.4GHz processor for HDV), Intel Centrino, Intel Xeon, (dual 2.8GHz processors for HD), or Intel Core, Duo (or compatible) processor; SSE2-enabled processor required for AMD systems Microsoft Windows XP with Service Pack 2 or Microsoft Windows Vista Home Premium, Business, Ultimate, or Enterprise (certified for 32-bit editions) 1GB of RAM for DV; 2GB of RAM for HDV and HD; more RAM recommended when running multiple components 10GB of available hard-disk space (additional free space required during installation) Dedicated 7,200 RPM hard drive for DV and HDV editing; striped disk array storage (RAID 0) for HD; SCSI disk subsystem preferred Microsoft DirectX compatible sound card (multichannel ASIO-compatible sound card recommended),1,280x1,024 monitor resolution with 32-bit color adapter Blu-ray burner required for Blu-ray Disc creation OHCI compatible IEEE 1394 port for DV and HDV capture, export to tape, and transmit to DV device QuickTime 7.1.2 software required to use QuickTime features Broadband Internet connection required for Adobe Stock Photos* and other services