IEC
International Electrotechnical Commission

IEEE
Institute of Electrical and Electronic Engineers.
International organisation of specialists that publish unified standards. Members of ANSI and ISO 

IEEE 802
IEEE commission responsible for LAN standards.

Indoor cable
A cable that is made especially for indoor usage.

Insertion loss
The loss caused by the insertion of a component such as a splice or connector in an optical fiber

Interferrometer
Measuring system capable of analysing the surface of polished ferrules.

ISDN (lntegrated Services Digital Network)
A telecommunications standard for digital transmission of voice, video and data. Ordinary phone lines are used to transmit digital instead of analogue signals, allowing data to be transmitted at a much faster rate than with a traditional modem.