Glossary D, E, F

DanteTM A multi-channel digital media networking technology base don IT industry standards, with very low latency and highly accurate synchronization. DanteTM supports a channel capacity of more than 500 channels per link.

DHCP Dynamic Host Configuration Protocol - protocol that enables a server to assign an IP address automatically to a computer.

DiffServ or Differentiated Service - Computer architecture that specifies a simple and scalable mechanism for classifying and managing network traffic in a way that it provides Quality of Service. For example, priority can be given to critical network traffic such as VoIP and lower priority given to non-critical traffic. 

DIN Rail - A metal rail used for mounting industrial control equipment such as power supplies. 

DoS Attack Denial of Service Attack - an attempt to make a computer resource unavailable to its potential users. 

Duplex Cable - Duplex Cables allows bi-directional, simultaneous transmission along a channel as opposed to only in one direction at a time. Often referred to as Full Duplex. 

EMI - Electromagnetic Interference, a disturbance affecting a networking circuit. This disturbance can be electromagnetic induction or radiation but is always emitted from an external source. 

ES-100 A new version of EtherSound™ offering increased functionality. ES-100 allows a redundant ring topology to be used.

Ethercon® An RJ45 connector combined with road proof XLR housing, manufactured by Neutrik.

Ethernet Most commonly used network protocol in the world, standardised by the Institute of Electrical and Electronics Engineers as the IEEE802.3 standard.

EthersoundTM A network protocol that uses Ethernet to transport audio as well as control and monitoring data over a network. EtherSound™ uses a daisy chain topology with a fixed bandwidth data flow and deterministic (variable to the network topology) very low latency. A new version of EtherSound™ with increased functionality has been introduced in 2006 as ES-100.

EPSR Ethernet Protection Switching Ring. From Allied Telesis, this provides fast failover between nodes in a ring of switches. This is a feature of certain Allied Telesis switches such as the AT-x900-12XT/S. 

Failover - The capability to switch to a redundant or standby server or network upon server/network failure. This process occurs without human intervention. 

Fast Ethernet - An Ethernet standard that carries traffic at a rate of 100Mbit/s. 

Fibre Adapter Fibre optic adaptors are used either within fibre patch panels and other termination units, or externally to interconnect pre terminated fibre optic cables. The adapter or uniter precisely aligns the ferules for both cables to maintain communication path. The alignment sleeve in a Single-Mode adapter is ceramic and is the most precise; this can be used for both Single and Multi-Mode applications. The bronze alignment sleeve in a Multi-Mode adapter is only suitable for Multi-Mode cables. Also known as a Uniter or Coupler 

Flow Control - This is a mechanism for temporarily stopping the transmission of data on an Ethernet network. 

FRNC - Flame Retardant Non-Corrosive.  

Full Duplex - Transmission and reception of signals or communications occurs simultaneously, compared to Half Duplex. See Duplex 

Fusion Splicing - The joining of two optical fibres end-to-end using heat therefore light passing through is not scattered nor reflected back by the splice. 

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