电信专业英英词典I-3（在线收听）

　　ISO

　　International Organization for Standardization

　　ITC

　　independent telephone company

　　ITU

　　International Telecommunications Union

　　IVR

　　integrated voice response

　　ILEC - Incumbent Local Exchange Carrier. The existing local exchange carrier in any given area, as opposed to CLECs.

　　Independent Telephone Company - A telephone company not affiliated with any of the original Bell telephone companies. See RBOC.

　　Integrated Services Digital Network (ISDN) - A high performance, digital phone circuit available from most regional telephone companies that allows for voice and data to be transmitted on the same line, producing fast, noise-free connections.

　　Internet - A collection and interconnection of tens of thousands of independent global networks.

　　Internet Relay Chat (IRC) - A popular program that allows users all around the world to communicate live, or chat, with other users.

　　InterLata Carrier - The carrier that provides your telecommunications service between your LATA and another LATA. Generally called "Long Distance Carriers."

　　InterNIC (Internet Network Information Center) - The centralized organization run by the National Science Foundation that provides various administrative services for the Internet, including Domain Name registration.

　　IntraLATA - Telephone services within the boundaries of a local access area. See LATA. Generally known as "Local Telephone Companies."

　　IP Address - A 32 bit address (four bytes separated by periods) that defines the location of a host on the Internet.

　　IRC - See Internet Relay Chat

　　ISDN - See Integrated Services Digital Network

　　ISP - Internet Service Provider. A company that provides connection to the Internet.