Glossary of terms

ISDN�s basic service is called Basic Rate Interface or BRI. BRI is made of two 64-kbps B channels and one 16-kbps D channel (2B+D).

A type of serial communication in which the presence or absence of an electrical signal indicates the state of the bit being transmitted.

A high-speed version of Ethernet (IEEE 802.3). Also called Fast Ethernet standard, 100BASE-T transmits at 100 Mbps.

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Creating a greater impact with Vista VFDA domes
23 Oct 08

Vista has one of the most comprehensive ranges of CCTV products and accessories available on the market.

Vista is the UK's largest selling brand of CCTV equipment. Vista has achieved this leading position by