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  2. Ring network - Wikipedia

    en.wikipedia.org/wiki/Ring_network

    A node failure or cable break might isolate every node attached to the ring. In response, some ring networks add a "counter-rotating ring" (C-Ring) to form a redundant topology: in the event of a break, data are wrapped back onto the complementary ring before reaching the end of the cable, maintaining a path to every node along the resulting C ...

  3. Ethernet Ring Protection Switching - Wikipedia

    en.wikipedia.org/wiki/Ethernet_Ring_Protection...

    The other Ethernet Ring Node adjacent to the RPL, the RPL Neighbour Node, may also participate in blocking or unblocking its end of the RPL. The event of an Ethernet Ring failure results in protection switching of the traffic. This is achieved under the control of the ETH_FF functions on all Ethernet Ring Nodes.

  4. Timed Up and Go test - Wikipedia

    en.wikipedia.org/wiki/Timed_Up_and_Go_test

    The Timed Up and Go test (TUG) is a simple test used to assess a person's mobility and requires both static and dynamic balance. [ 1 ] It uses the time that a person takes to rise from a chair, walk three meters, turn around 180 degrees, walk back to the chair, and sit down while turning 180 degrees.

  5. 5ESS Switching System - Wikipedia

    en.wikipedia.org/wiki/5ESS_Switching_System

    The 5ESS switch has three main types of modules: the Administrative Module (AM) contains the central computers; the Communications Module (CM) is the central time-divided switch of the system; and the Switching Module (SM) makes up the majority of the equipment in most exchanges. The SM performs multiplexing, analog and digital coding, and ...

  6. Ringing (signal) - Wikipedia

    en.wikipedia.org/wiki/Ringing_(signal)

    In electrical circuits, ringing is an oscillation of a voltage or current.Ringing can be undesirable because it causes extra current to flow, thereby wasting energy and causing extra heating of the components; it can cause unwanted electromagnetic radiation to be emitted [citation needed]; it can increase settling time for the desired final state; and it may cause unwanted triggering of ...

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  8. Telephone exchange - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange

    Similar schemes were used in the Americas and in some European countries including Spain. Digit strings between switches were often abbreviated to further improve utilization. For example, one switch might send only the last four or five digits of a telephone number. In one case, seven digit numbers were preceded by a digit 1 or 2 to ...

  9. Node (networking) - Wikipedia

    en.wikipedia.org/wiki/Node_(networking)

    In telecommunications networks, a node (Latin: nodus, ‘knot’) is either a redistribution point or a communication endpoint.. A physical network node is an electronic device that is attached to a network, and is capable of creating, receiving, or transmitting information over a communication channel. [1]