NNI (Network-to-Network Interface)

The boundary or point of interaction between network serv-

ice providers.The NNI is both a physical and logical point of demarcation.The NNI serves the technical boundary where protocol issues are resolved and as the point of division between the responsibilities of the individual service providers. NNIs are defined for asynchronous transfer mode (ATM) and frame relay, as examples. See also ATM, logical, frame relay, physical, and protocol.

• instant messaging (IM)
• Institute of Electronic and Electrical Engineers (IEEE)
• Institute of Electronic and Electrical Engineers (IEEE)
• Insulated Cable Engineers Association (ICEA)
• insulation
• insulator
• insure
• integrated access device (IAD)
• integrated circuit
• integrated messaging
• integrated services digital network (ISDN)
• Integrated Services LAN (ISLAN)
• intellectual property
• intelligent network (IN)
• intelligent peripheral (IP)
• Interactive Video and Data Services (IVDS)
• interactive voice response (IVR)
• intercom
• interexchange carrier (IEC or IXC)
• interface
• interface data unit (IDU)
• interference
• interferometer
• interframe compression
• Interim Standard 136 (IS-136)