Installation [UKS]

1. General considerations Terminal cable devices on the networks of local service sufficiently widely are used with the distributed telephone density. The widest use obtained cable terminal boxes [YAKG]. However, at present this obsolete construction does not satisfy the contemporary requirements, presented down the networks of electrical communication. In accordance with “basic condition of the development of the correlated communication network of the Russian Federation down the prospect until 2005” one of the basic directions is compiling the networks of user access, foreseeing organization digital customer's lines (technology DSL). The organization of the networks of access in the user section of lines provides for the transfer of signals [TSSP] with different codes (HDB-3, 2B1Q, Sarah, RS- RAM and other) in the range of frequencies to 2048 kHz. In connection with these to the cables and terminal devices are imposed the requirements on the electrical characteristics, which ensure the functioning of networks with their load for the sake of different systems of digital packing. Thus, to the terminal devices are imposed requirements on the operational characteristics of transfer and the mutual influences over a wide range of frequencies. [UKS] - the device of cable connections (TU of 45-86 6e0.322.136) become high-frequency.

Basic requirements at the point of [UKS]: The device of cable connections (УКС) is developed in accordance with the general technical requirements “equipment cable terminal”, affirmed of 06.06.2000[g]. By first deputy minister of connection of the Russian Federation for connection and information theory. [UKS] relates down the class of the terminal cable equipment of the networks of the wire communication of the utilized in the sections user access, which ensures the functioning of the equipment for the digital packing of customer's lines (DSL). The frequency range of use - to 2048 kHz. In accordance with the general technical requirements [UKS] ensures operation before open air due to the climatic conditions plus 50 minus of 60E[S] and relative humidity of air to 100% with the temperature of 25E[S] and lowering in the atmospheric pressure to 60 kPa (450 mm Hg)

[UKS] ensures resistance to the action of the following factors of environment: solar radiation, rain (with intensity to 3 mm/min), wind (with a speed of up to 50 m/s), hoarfrost and dew, fog, dust, the industrial atmosphere.

Construction [UKS], which uses as the skirtings a collection of single-pair connectors of the type [MKH]2000 (firm [ZM]) and VX- MD (Raychem), ensures fulfilling requirements Ott about the electrical characteristics:

• insulation resistance between the elements of skirtings, the generatrix the two-wire circuit, and relatively “the earth” must be not less than 3000 M.
  


• the value Of r[iz] of skirting together with the installed cables depending on environmental conditions they are given before Table 1.
  
  Table 1
  
  

  Types of the cable	Insulation resistance between the veins [TSSP], M
  	Climatic of [ksloviya]
  	Normal and reduced temperature	The elevated temperature	Increased humidity
  1	2	3	4
  [TPP], [TPPep], [TPPZ]	1000	200	20
  [KSPP], [KSPZP]	10000	2000	20
  [PRPPM]	75	50	20
  [TPV]- AD	1000	1000	20



• contact resistance during the introduction of the cable core beside the single-pair connector is not more than 30 m. ;
  


• the crosstalk attenuation between the two-wire circuits has a value not less:

  100 dB - in the range frequencies 0,3 - 3,4 kHz;
  80 dB - in the range frequencies 3,4 - 192 kHz;
  60 dB - in the range frequencies 192 - 1024 kHz.
  

• the testing voltage between the contacts of the single-pair connectors, which form the two-wire circuit - is not less:
  

  1500 [v] at the normal climatic conditions and a reduced temperature;
  1100 [v] at elevated temperatures;
  900 [v] with the increased humidity.
  

The lines, installed with the aid of [UKS], ensure the fulfillment of the electrical standards of the branch standards:

• EAST 45.82-96. Network is telephone urban. Of lines are user cable with the metallic veins;
• EAST 45.83-96. Network is telephone rural. Of lines are user with the metallic veins;
• EAST 45.81-97. Compatability of the electromagnetic of the circuits of the transfer of the discrete and analog signals of the lines of the local networks of electrical communication.

The protection of customer's lines in the section “distributive terminal device - subscriber” in [UKS] is executed in accordance with the requirements OST R -600-93 “branch construction- technological standards for the installation of construction and couplers, radiobroadcasting and television”.

Developed, approved and inculcated on the federal communication network the U-shaped fitted individual and multipair connectors of the current-conducting veins make it possible to commutate the chains of communication cables before the clutches of the electrical cables of local telephone network. The application of [desyatiparnykh] connectors (KRONE, POYE, [Interkross], Tyco Of ele[s]troni[s]s and others) [rekomendovano] to the use before the terminal devices of the type [KRT]-10, [BKT], [UKS] ([YAKG]).

Taking into account that the device of cable connections (УКС) is intended for the commutation to the distribution network of the closely spaced, but territorially distributed subscribers (as a rule, private sector), user installation to the latter can lay both before ground and on the supports (of stand) airlines of communications. Such, protected based on the external dangerous influences, [UKS] must commutate the chains of the distributive section of customer's line with the diameters of the current-conducting veins (0.32 0.7) mm with the chains of user installation with the diameter of the current-conducting veins (0.8 1.2) mm.

Used on the network [UKS] they must have a protective system on the stress, which prevents the expensive equipment of the subscriber: digital sealer, modem, computer, facsimile apparatus and other from the possible defeat by the sources of dangerous external influences (discharge of thunderstorm, [LEP] and others).
Is examined below version [UKS], built on the base of the imported single-pair hermetically sealed connectors with the integrated system, of commutating cable with the chains (0.32 0.7) mm with the user installation, the diameter of current-conducting veins of which is (0.8 1.2) mm.

2. Operating principle of the single-pair connector

Single-pair connectors [MKH] 2000 or VX- MD take the following form:

[Ris].1 the single-pair connector of a series MX 2000 (firm of 3[M])

[Ris].2 the single-pair connector of a series VX- MD (Raychem)

2.1 with the complex protection

Connectors are let out two forms of the assembly:

• Silencer of the red color
• Aqueous nests of the red color
• Discharger red discharger is pink
• Measuring contacts

[Ris].3 connector VX- MD, which contains the system of electrical protection (silencer of red color)
[Ris].4 the connector MX 2000, which contains the system of electrical protection (commutation nests of the connection of the user installation of red color)

2.2. Without the means of complex protection

• Silencer of the gray color
• Introductory nests of the gray color

[Ris].5. Connector VX- MD (silencer of gray color)

[Ris].6. Connector [MKH] 2000 (commutation of [gnezdapodklyucheniya] of [abonentskoyprovodki] of gray color)

The connection diagram of the chains of single-pair connector is represented before [ris].7 and [ris].8.

[Ris].7. Circuit diagram of connector with the means of protection	[Ris].8. Circuit diagram of connector without the means of protection

After removing silencer based on the work site, electrician can be connected by set down the linear (contacts 4-8) and after removing silencer based on the work site, electrician can be connected by set down ([Ris].3, [Ris].4)

3. Installation of the device of the cable connections (УКС)

3.1. To become acquainted for the sake of the construction of the device of cable connections, which has the following form ([Ris].9)

a) the diagram of the arrangement of the elements	b) [UKS] before the collection

[Ris].9 the assembly diagram Of [uKS]-10[kh]2 (20[Kh]2)

1. Box is assembly
2. Connectors
3. Plancks are assembly
4. Terminal of the grounding
5. Planck fixing
6. Base of the second tier of the connectors
7. Lock
8. Support is wall
9. Opening is ventilation
10. Door
11. Clutch is butt
12. Elbow guiding

3.2. To verify assembly [UKS] on the packing file.

3.3. To gather [trubostoyku], after joining elbow guiding (12) and support stand (8), ([Ris].10).


[Ris].10. Installation of [trubostoyki]
3.4. In the place, diverted for installation [UKS] (next to the cable manhole of connection - [KKS], or the support [VLS]), to develop foundation area, to establish [trubostoyku] beside ground to the level of the terminal of protective ground (4), to adjust the position of the support of stand with respect to the elbow and [KKS]. After fastening the stand of [trubostoyki] to the elbow by the fastening bolts of the clutch of butt (11), to flood foundation area for the sake of cement- sandy mass.
To reach the steady state of [trubostoyki] against the concrete basis (time of the hardening of the concrete mixture of 24 hours with t=200 [s]).

3.5. From the cable manhole of connection to derive through [trubostoyku] the necessary commutated cables and wires.

3.6. To fasten before the housing of assembly of box (1) on the assembly laths (3) the necessary quantity of single-pair connectors of those supplied before the complete set. Before the base of connectors are elastic fastening seizures, necessary for the grasp of lower boundaries of the lines of the assembly laths of box [UKS]. In this case the nests of the commutation of the current-conducting cores of a cable of the type TP (0.32 0.7) mm will prove to be on top.


[Ris].11. Installation of single-pair connectors on the assembly laths
The filling for the sake of the connectors of assembly laths, with their subsequent operation, is recommended to begin based on an upper number.

3.7. Applied to [UKS] multipair cable [TPP] of 10[kh]2 to pass through the introductory fastening clamps under the lower assembly lath and the fixing lath (5) fastening the cables of an upper number, further, between 5 and 6 single-pair connectors to derive with the reserve before 20 cm above the connectors ([Ris].12).


[Ris].12. Introduction of the cable [TPP] of 10[kh]2 to an upper number of the single-pair connectors
3.8. To bend back from upper part of the commutated cable down itself and to clean covers. To put cable conversely between 5 and 6 connectors so that the end of cable sheathing would be against the level of the upper part of the connectors. Naked wire, which contacts with the screen tape of cable to lower on the cable and to connect down the housing of box, using an average clamp of the upper guiding lath of fastening cables and wires.


[Ris].13. Removal of cable sheathing [TPP] of 10[kh]2,
commutated before an upper number on the connectors
3.9. To prepare the upper nests of connectors for the commutation of the chains of the cable [TPP] of 10[kh]2 without the removal of the isolation of the current-conducting veins, for which in the case of commutation [UKS]:

a) by connectors [MKH] 2000 to draw off down itself to the flick the upper transparent plastic plate


[Ris].14. Connector of a series [MKH] 2000
b) by the connectors of a series VX- MD with the aid of the screwdriver to unscrew to the flick upper, black color the bolt


Fig. 15 connector of a series VX- MD
3.10. To disperse vapors of the cable core Of [tPP]10[kh]2 on an upper number of connectors, observing, in this case, the start of wire “a” in left nest, and wire “b”, correspondingly, beside the right.
Appropriate pairs of the isolated conductors to put to the support beside the nests of connectors. In the case of the presence of the connectors of the series:

• [MKH] 2000 to harvest to the support the previously drawn off plate;
• VX- MD by screwdriver to screw up to the support the previously unscrewed bolt.

In both cases before U descriptive fitted contacts will occur the commutation of the chains of cable with the plates of connector.

[Ris].16. Connection of a cable of the type [TPP] of 10[kh]2
to the plates of the connectors
3.11. Commutated chains of the cable (wire) of user installation ([KSPP], [PRPPM]) to bring down commutation nests, located before the lower part of the vertically located connectors [MKH] 2000, or VX- MD. For the pressurization of the commutated chains, before the connectors of the series indicated are used identical threaded bolts, for which it is preliminarily necessary to unscrew bolts before hearing of flick by screwdriver.

3.12. With the presence of cable [KSPP], the latter are freed based on the shell down the length, necessary for the convenient commutation of chains before the nests of connectors. The chains of cable without the removal of isolation are introduced beside the appropriate nests of connectors and are pressed by bolts by their tightening to the support by screwdriver. Naked wire is connected up down the nearest bolt of fastening lath.


[Ris].17. Installation of the chains of cable [KSPP]
before the nests of the connectors
3.13 installation of chains [PRPPM] before the nests of connectors is conducted analogously for the sake of cable [KSPP] with exception of the operations specific for the wire: the removal of covers and the installation of naked (screen) wire.

3.14. Before installation of veins “and” and “b” the wires are equalized along the length and they are bifurcated relative to each other on 30 mm.


[Ris].18. Installation [PRPPM] before the nests of the connectors
a) MX 2000

[Ris].18. Installation [PRPPM] before the nests of the connectors
b) VX- MD