T

1. Tera. From the Greek teras, meaning monster, translates to trillion. 2. In terms of the electromagnetic spectrum, THz (terahertz) is a trillion (1012) hertz, which is in the range of infrared and visible light.

Infrared light has application in fiber optic and free space optics (FSO) transmission systems. A Tbps is a trillion (1012) bits per second. In transmission systems, therefore, a trillion is exactly 1,000,000,000,000

since the measurement is based on a base 10, or decimal, number system. 3. In computing and storage systems, a TB (terabyte) is actually 1,099,511,627,776 (240) bytes, as the measurement of internal computer memory is based on a base 2, or binary, number system. The term TB comes from the fact that

1,099,511,627,776 is nominally, or approximately, 1,000,000,000,000. See also byte, electromagnetic spectrum, and hertz. 4. T interface or Reference Point T in ISDN. See Reference Point T.

• intermediate distribution frame (IDF)
• intermodulation noise
• intermodulation noise
• internal reflection
• International Direct Distance Dialing (IDDD)
• International Electrotechnical Commission (IEC)
• international gateway facility (IGF)
• International Information Infrastructure (III)
• International Mobile Telecommunications-2000 (IMT-2000)
• international Morse code
• International Multimedia Telecommunications Consortium (IMTC)
• International Organization for Standardization (ISO)
• International Record Carrier (IRC)
• International Telecommunication Union (ITU)
• International Telecommunication Union-Radiocommunication Sector (ITU-R)
• International Telecommunication Union-Telecommunication Standardization Sector (ITU-T
• International Telegraph Alphabet #2 (ITA #2)
• internet
• Internet
• Internet2
• Internet2
• Internet2
• Internet Activities Board
• Internet Architecture Board (IAB)
• Internet Control Message Protocol (ICMP)