Glossary
IR
Infrared is a part of the non-visible electromagnetic spectrum. Typically used for short range wireless communication it is also used as a form of dark illumination to enhance CCTV images at night.
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IRS
Integrated Reception Systems typically combine UHF, FM, DAB and satellite signals into a single distribution system. IRS systems scale from single dwelling to communal and complex filtered and re-modulated solutions depending on application.
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IPSEC
Internet Protocol Security. The IPSEC protocol encapsulates one data packet entirely inside another in order to carry it across a transit network. IPSEC is one protocol used to create a VPN - the complete encapsulation (and usually encryption) by IPSEC is similar to the envelope used to send a letter. The letter is intact from sender to recipient however the envelope get read and passed between sorting offices.
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