When designing a fiber-optic (fiber-optic communication lines) should immediately answer the following questions: 1. Characteristics of the signal to be broadcast via fiber-optic 2. Distance signal transmission over fiber optic 3. Route fiber-optic cable (in the sewers, open, etc.) 4. Is there a connection to a particular type of active equipment, 5. Is there an existing fiber-optic line that needs to build or expand. So, for the design fol each of the questions to be essential. Let us examine each question for the design of fiber-optic line.
Characteristics of the signal to be broadcast via fiber-optic 1. Through the fiber optic can be broadcast the following types of Signal: Video * Transfer * Transfer audio * Transmission circuit dry contact (transfer of NC-NO); * Transfer Protocols RS-232/422/485 (four-or double) * Passing Ethernet 10/100 or 1000 (transfer gigabit ethernet); * streams E1, FE1, V.35 and others. 2. Distance signal transmission in the design of fiber-optic line to select the characteristics of optical fibers, terminals, and the category of active equipment necessary to understand at what distance will be broadcast by those or other signals on fiber-optic line. 3. Track laying fiber-optic cable in the design of fiber optic cables fiber optic route affects mainly the choice of the characteristics of fiber-optic cable: a) Fiber optic cables for backbone networks: * For installation in conduit, boxes, pipes, sewers * For installation in all soil groups; * Suspended cables; * Combined Cables * Cables in "dry" performance.
b) Fiber-optic communication cables for local area networks: * Cables for optical cables, optical cables * Distribution. 4. Binding to a specific type of active equipment in the design of fiber-optic Active equipment from different vendors to send the same kinds of signals can differ in various characteristics: * The transmission distance of a signal on fiber-optic * The maximum attenuation that can take an active fiber optic equipment * gain signal active fiber optic equipment * Temperature range of active fiber optic equipment; * Auxiliary performance (power consumption, size, voltage, etc.) 5. The existing optical fiber connections, you want to build or expand. When designing a fiber-optic-based current is important to determine whether these existing lines of communication to perform the tasks set in the new design: * Is it possible to expand the network without changing the fundamental fiber-optic solutions * Do I need to use converters from multimode lines in single-mode (and vice versa) * Can there be two networks of fiber-optic (existing and planned) separately with only one bond, or to their tight weave. Comprehensive response to all these questions can begin to design fiber-optic line.
Among other features of the drainage pumps, we note an increased resistance to contaminated liquid and suction pipe, located in the 'bottom' body, so water is collected in full, without the rest (after the technique works in a series of Drenox 80 / 7 from Nocchi and top floor of Pedrollo remain pools deeper than two or three millimeters). To drain the device can operate in automatic mode, equip them with special floats (submersible pumps Ama-Drainer, KSB). This option insures the pump from pumping full of liquid. Suction mechanism in models of the series tmw (WILO) forms at the site of a twist, due to what is removed and the sediment. The main characteristic of the drainage technology – the size of solid particles, which are working pump chamber can pass without harm to himself. Most domestic pumping systems designed for fractions with a diameter of 10-30 mm, but some models (TP 50 and tp 65, WILO; dw Vox, Right, Ebara; gmc and gmv, Calpeda; mc, vx, Pedrollo) capable of pumping fluid from the inclusions diameter of five to seven centimeters. Need to say a few words about the universal submersible pumps of small capacity, such as vibrational model 'Kid' and other Russian counterparts. The 'Babe' no rotating parts, which improves its mechanical durability. It is perfect for watering the garden plots and vegetable gardens, water garden farms, pumping water from basements, and is inexpensive – about $ 25 The only disadvantage of this model – no Automation of the box.