ODESSA NATIOANAL ACADEMY OF TELECOMMUNICATION named after POPOV

APPROVED

Academy headmaster ______________

«_____» _____________20__ y.

Fiber–optic communication lines department

METHODICAL INSTRUCTIONS

For course design

«ONE-WAVE FIBER-OPTIC TRANSMISSION LINES PROJECT»

Directed Communication Systems

for student of course 6.050903 TELECOMMUNICATIONS

Odessa 2013

3 Selection of route, type of cable and transmission systems

3.1 Short characteristic of terminal points

Using encyclopedia, maps and guides [1, 2, 3], to review and give a brief description of terminal points, among which line is being built. Specify administrative-economic importance of the city, the population (oriented by the symbols on the map or in the guide), the direction of the industry, the underground economy (presence of cable duct, water supply etc.), availability of trams, type of bridges and sidewalks, soil conditions.

Specify the main purpose which FOCL organization must achieve and role of the overall highway network in Ukraine.

3.2 The choice of fiber optic transmission lines route

By studying maps [2, 3] provide two possible options of FOCL route. Compare possible route options and choose the most expedient and economically beneficial option. While selecting the tracks you can use map of any size coated with highways and soil roads. It is comfortable to use atlas of highways. Compare options on the following parameters: length of the route, the number of passages through obstacles, soil conditions, ease of construction and operation. Submit drawing of road variants. In drawing of chosen variant put straighten option of the cable indicating the end and intermediate points through which the trail passes.

Execute drawings of skeletal circuit cable line (without scale) scheme. In the drawings indicate general length of the track and the cable length tracks and cable in areas, passages through highways and rail roads, water, category soil resistivity of soil in areas, the number of lightning hours per year, the amount of cable required for laying in areas VOLP. Example of skeletal fiber optic route options scheme shown in Fig. 3.1.

Line route length and number of conversion based on less work, opportunities of using mechanisms, maximum farness from the sources of stray currents (el. lines, el. railroads and tram) and unsymmetrical high voltage. In the suburban area the route should be parallel to highways and dirt roads (reserves, curb), have the least number of crossings of rivers, highways, rail roads with tram tracks. On route across the river should be located at a distance of not less than 1000 meters from the railway bridges and highways bridges of main roads at distance 200 m from bridges, highways and local roads. The route should pass on bridges downstream.

At the cities cable should be laid in a telephone ducts and lead to maximize the use of existing cable duct and reserve channels. Oriented amount of laying cable is set between 3…4 km on each city with the population up to 500 thousand citizens, located along the highway. From the total length of the sewer, 40…50% is taken as existing one. From the total length of highway 5…10% is envisaged on manual laying of cable and the nest parts are laid by the cablelayer.

In the report it is necessary to give a short characteristic of the selected route, terminal and intermediate points.

Depending on the soil group and conditions of laying it is necessary to project the use of next types of cable, for example, production of ПАТ ”Завод ”Пiвденкабель””:

a) armored by corrugated stripe and two steel stripes (ОАрБгП, ОБгП, ОАрБП, ОБП) for underground laying of all categories and through floating across the river with swampy shores and resilient;

b) round steel wire armored (ОАрКП, ОКП) for laying across navigable and floating rivers and lakes, as well as in soils prone to permafrost phenomena, such convexity on steep slopes in seismic regions.

In determining the required number of cable according to [3] considered pro- resulted in its laying in the trench and installation in the following amounts:

a) for armored underground cable to waste in fusing works, for laying in trenches and pits - 2,4 % [4] (when laying cable in soils prone to bias or convexities, stock up on concluding a trench may be increased up to 4 %);

b) underwater cable (the river to the lake) for laying on the bottom of the relief – defined by project (for calculations can be used the value 14 %);

c) for the cable in sewer layed on adhesions and styling - at least 8 meters from the manhole covers of each well, and on each sleeve in the trench – not less than 10 m. Additional situational course project drawings of highway line are added to the course project, and designed for VOLP report note comparison and explanation of selected version of at least two considered. Key figures of comparable options VOLP (length of the route, characteristics of terrain, soil, roads and railways, intersection with roads etc.) are added to Table 3.1.

Table 3.1 - General characteristics of the route variants FOCL

№	Name		Units of meas.	Number of units		Note
				І variant	ІІ variant
1	Length of the route		km
2	Locality: - populated; - open; - forest; - crossed; - swamped		km km km km km
3	Soil: - 2 - 3 categories; - 4 category; - 5 - 6 category.		km km km
4	Roads: - with asphalt covering; - with macadam coating; - unpaved roads; - off-road		km km km km			The parallel passage
5	Rail roads:		km			The parallel passage
6	Intersection with: - motor roads; - railways		m m
7	Water obstacles: - Shipping river; - Non-shipping river;		m m			Width (m)
8	cable	be cablelayer	km
		by hand	km
		in cable duct	km
9	Quantity of SRP		units
10	Quantity of NSRP		units