05 installing the cabinets

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Installation ManualM900/M1800 Base Transceiver Station (BTS312)

Hardware Installation5 Installing the Cabinets

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5 Installing the Cabinets

5.1 Arrangement of Cabinets

If BSC and BTS are in the same equipment room with an additional power distribution

cabinet, it is recommended that a single row arrangement be adopted facilitate cabling.The following two schemes can be used to arrange the cabinets:

I. Ordinary scheme

The distance between the cabinet side and the wall is no less than 0.8m.

The distance between the back of the cabinet and the wall is no less than 1m.

The width of the aisle is no less than 1m in the equipment room.The cabinet should be as close as possible to the feeder window so as to reduce the

length of feeder.

II. Maintenance-free scheme

The cabinet can be placed against the wall, and the distance between the back of thecabinet and the wall is not restricted.

Figure 5 -1 is an illustration of a site with two BTS cabinets (one basic cabinet and one

extension cabinet).

Power distribution room

Transmissionequipment

Maintenance

terminal

F e e d er wi n d ow

Monitoringinstrument

BTS BTS

Basic Extension

Figure 5-1 Plane view of the equipment room





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Installation

Locate thecabinet

Insulation test

Install thelower frame

Pass?

Install cabinet

Install theupper frame

End

Figure 5-3 Flow chart of cabinet installation away from the wall

5.3.2 Introduction of Base Assembly

When a cabinet adopts the common floor-supporting installation mode, a base

assembly is used as transit part. As shown in Figure 5-4, the base assembly iscomposed of an upper frame and a lower f rame. Fix the upper frame on the lower part

of th e cabinet, and the lower frame on the cement ground. Then push the upper frameinto the lower frame and lock them to complete the cabinet installation.

(1) Upper frame (2) Lower frame

Figure 5-4 Structure of the base assembly





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5.3.3 Locating the Cabinet

I. Marking

Define the installation location of the cabinet based on the reference dimension givenin the construction design drawing, measure a few points with a tape measure, and

draw two straight lines parallel to the reference and with a distance of 370 mm inbetween by using an ink string. Then, define the installation hole positions of the firstcabinet on the two lines according to the design requirement, and define the

installation holes of the other cabinets with the holes of the first cabinet as reference.To prevent mistakes, all the installation hole lines should be measure again until theyare confirmed to be correct dimensions. Figure 5-5 shows installat ion holes of a single

cabinet, and Figure 5-6 shows the installation holes of multiple c abinets.

(1) Inner wall or reference property (2) Edge line of cabinet door plate (3) Use M12 expansion bolt

Figure 5-5 Installation holes of a single cabinet


Figure 5-6 Installation holes of multiple cabinets





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II. Drilling

Drill holes on the ground at expansion bolt hole marks with a percussion drill. The drill

bit size should bev14 or v16.

Hold the drilling bit vertical to the ground during drilling. Hold tight the drillstock with

two hands to keep it in the right direction, vibrations of the drill may damage the ground,enlarge the size of the hole or incline the hole.

The depth of the holes should the length of the expansion tube plus the tapered head,

and the depth of all holes should be the same. When checking the depth of the holes,remove the dust from the holes so that the net depth is measured. When drilling the

holes, use a vacuum cleaner to clean the dusts.

If the ground is too hard and smooth to settle the drill bit, punch a pit with a chisel

before drilling.

In the case of av14 bit, and if the hole size is small, the holes can be enlarged bymeans of technical processing.

As the line drawing and hole drill ing jobs are the fundam ental work for hardware

installation, any bad precision will bring great troubles to the follow-up jobs. Therefore,the guarantee of these jobs is a necessary condition for the quality of the wholeproject.

5.3.4 Installing the Lower Frame

I. Installing the expansion bolt

Before the installation, remove the dust inside and outside the holes, and then check

the hole distance. Whenever big errors occur, the concerned hole must be re-locatedand drilled.

Put the expansion bolts and the expansion tubes perpendicularly into the installationholes. Strike directly on the bolts with a rubber hammer until the expansion tubes of the

expansion bolts are totally driven into the ground. Then, install the insulating washers,big flat washers (to replace the washers contained in the expansion bolts), spring

washers and nuts on the expansion bolts. Tighten the nuts to 45 N∃m. Pull the

expansion bolt until it expands totally. Finally, take down the nuts, spring washers andflat washers.

II. Installing the lower frame

Follow the instructions shown in Figure 5-7 to install and fix the lower frame. Fit the

installation holes of the lower frame to the corresponding expansion bolts. Fix the big

base to the ground with nuts, spring washers and big flat washers. Use a torque

wrench to tighten the nut and make the torque at 45 N∃m. At this step, it is necessaryto install insulating spacer and insulating washer to ensure the insulation between the

cabinet and the ground.

The nut used for fixing the lower frame should be tightened alternatively to reduce the

stress between the bolt and the lower frame.





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(1) Nut M12 (2) Spring washer ?12 (3) Big flat washer ? 12 (4) Insulating washer (5) Lower frame (6) Insulating spacer (7) Washer (8) Expansion bolt M12% 80

(9)Installation direction

Figure 5-7 The lower frame installation

5.3.5 Insulation Test

Set the multimeter at the resistance measurement position. Place the two measuring

heads of the multimeter in contact respectively with cabinet and the expansion bolts tothe measure the resistance. If the circuit is disconnected, complete the installation.

Otherwise, it indicates that the cabinet is not insulated. In this case, check if any

insulating washer or insulating spacer is missed, or if any insulating washer isdamaged. Repeat the procedure as given in "II. Installing the lower frame" of Section

5.3.4 and then check the insulation again.

5.3.6 Fixing the Cabinet

Place the cabinet on the upper frame, and use the fastener to fix the cabinet to theupper frame through the four fixing holes from top to bottom. See Figure 5-8.





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(1) Bolt M12 X 15 (2) Spring washer ?12 (3) Big flat washer

(4) Insulating washer (5) Upper frame of the base

Figure 5-8 Installation of the cabinet and the upper frame

5.3.7 Installing the Cabinet

I. Fixing the upper frame

Raise the upper frame onto the lower frame. Push in and fix the cabinet with bolts, as

shown in Figure 5-8. Place the cabinet installed with the upper frame to the front of the

lower frame. Align the cabinet and the lower frame. Push the cabinet into the lower

frame until the upper and the lower frames fit in. Fasten the bolts to complete theinstallation of the cabinet, as shown in Figure 5-9.





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II. Leveling the cabinet

Place a level bar in vertical direction on the top -plane of the cabinet to check the

leveling of the cabinet. When errors exist, adjust the leveling by adding spacersbeneath the lower frame, as shown in Figure 5-9 .

(1) Spring washer ?12 (2) Bolt M12 X 30 (3) Flat washer ? 12 (4) Base components

Figure 5-9 Installation of the cabinet against the wall

5.4 Installation Against the Wall

When the distance between the backplane of a cabinet and the wall is less than 800millimeters, it is installed against the wall.





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Caution:

In consideration of the cooling requirement, the distance between backplane of the cabinet and the wall

should be no less than 100 mm.

5.4.1 Installation Procedure

Start

Locating thecabinet

Fixing the cabinet

Insulation test

Passed the test?

End

Y

N

Figure 5-10 Cabinet installation flowchart on the cement ground

5.4.2 Locating the Cabinet

I. Marking

Determine the installation position of the supports according to the benchmarkdimensions and the support dimensions specified in the construction plan. Specify

several points for line drawing with a tape measure and draw two straight lines parallelto the benchmarks, with the spacing of 370 mm. Then determine the hole position for





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the first support on the two lines as designed. With this hole as a reference, specify the

installation hole position of the other support. To be on the safe side, repeatedmeasurements are required until the dimensions are correct. Figure 5-11 is the

installation hole diagram for the single cabinet and the Figure 5-12 is the installation

hole diagram for multi -cabinets.


Figure 5-11 Installation holes of a single cabinet


Figure 5-12 The installation holes of multiple cabinets

II. Drilling

Drill holes on the ground at expansion bolt hole marks with a percussion drill. Choosethev14 or v16 drill bit.







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The depth of the hole should be the length of the expansion bolt sleeve plus the drill bit

and the depths of respective holes should be consistent. Before measuring the depthof the holes, the dust inside the hole should be removed with a vacuum cleaner.

If the ground is too hard and smooth to settle the drill bit, punch a pit with a chiselbefore drilling.

The line-drawing and hole-drilling is the fundamental work for hardware installation, if

the accuracy is not high enough, the future work will be greatly impacted. Thus thegood quality of this work is the necessary precondition to guarantee the quality of theoverall construction.

& Note:

The latter steps required for the installation are omitted here as they are the same as in section 5.3.

5.5 Installation on Ground with Insufficient Load Bearing

Capacity

5.5.1 Introduction to the Installation

When the allowable load bearing of the ground is lower than 4.0 kN/m2, it is

recommended that the cabinets are installed against the wall (please refer to Section

5.4). In this case, the relations between the maximum allowable distance from thecabinet backplane to the wall surface, the ground load and the floor span are shown in

Table 5-1.

Table 5-1 Relations between the maximum allowable distance from cabinet rear panel to the wall, the

ground load and the floor span

Max. allowable distance between

rear panel and wall (mm) Allowable evenly distributed load of the ground (kN/m2)

1.5 1.8 2.0 2.5 3.0

3.0 100 140 190 320 480

3.3 110 190 250 400 590

3.6 180 280 350 550 800

Floor span (m) 3.9 260 380 470 720 1060

Caution:

When combined cabinets are installed against the wall in buildings constructed with pre-casted floors, payattention to the installation direction of the cabinets. It is not allowed to install more than two cabinets on

the same block of floor, as shown in Figure 5-13, and it is not allowed to place heavy objects within 1.5

meters' reach of the cabinets.





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(1) (5) Cabinet (2) Floor (3) Correct installation direction (4) Wrong installation direction

Figure 5-13 Sketch of combined cabinet direction

If the cabinet cannot be installed against the wall, an extended base should beemployed to reduce the load for the ground. Figure 5-14 shows the completed

installation of the cabinet on the extended base.

(1) Extended base

Figure 5-14 Completed installation of BTS312 cabinet on the extended base





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5.5.2 Brief Introduction to the Extended Base

If a cabinet cannot be installed against the wall, an extended base assem bly isemployed as provisional part to reduce the load of the cabinet for the ground. The

physical dimensions of the extended base assembly are 3000 mm%616 mm%100 mm

(L % W % H), as shown in Figure 5-15. First, fix the extended base assembly on thecement ground, then lay a checkered aluminium plate on it, and finally complete the

cabinet installation. The cabinet can be moved back and forth on the extended baseassembly at the interval of 185 mm.

Figure 5-15 Schematic diagram of the extended base





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5.5.3 Installation Flow

Installation on ground withinsufficient load bearing capacity

Complete the installation

Insulation test

Install the checkered plate

Cabinet installation

Install the extended base

Assemble the extended base

Locate the extended base

Test passed?N

Y

Figure 5-16 Flow chart of cabinet installation on an extended base

5.5.4 Assembling the Extended Base

Use connecting channel-steels and fasteners to connect the main base assembly and

the lengthened base assembly on the site, thus complete the assembly of theextended base assembly, as shown in Figure 5-17.





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( 1 )

( 2 )

( 3 )

( 4 )

(1) (4) Extended base assembly (2) Connecting channel steel (3) Main base assembly

Figure 5-17 The extended base assembly

5.5.5 Locating the Extended Base

I. Marking

Define the installation location of the cabinet based on the reference dimension givenin the construction design drawing, measure a few points with a tape measure, and

draw two straight lines parallel to the reference and with a distance of 566 mm inbetween by using an ink fountain. Then, define the first installation hole position of theextended base assembly on the two lines according to the design requirement, and

define the other installation holes with this hole as reference. To prevent mistakes, all

the installation hole lines should be measured again until they are confirmed to becorrect dimensions. Figure 5-18 shows the hole positions of single -cabinet installation

and Figure 5 -19 shows the hole position of dual- cabinet installation. For the installationof multi-cabinets, refer to the installation of dual -cabinets.

(1) Edge line of extended base (2) M12 expansion bolt

Figure 5-18 Single-cabinet installation holes





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(1) Edge line of extended base (2) M12 expansion bolt

Figure 5-19 Two-cabinet installation holes

II. Drilling

Drill holes on the ground at expansion bolt hole marks with a percussion drill. The drill

bit size should bev14 or v16.



The depth of the hole should be the length of the expansion bolt sleeve plus the drill bit

and the depths of respective holes should be consistent. Before measuring the depth

of the holes, the dust inside the hole should be removed with a vacuum cleaner.

If the ground is too hard and smooth to settle the drill bit, punch a pit with a chiselbefore drilling.

In the case of av14 bit, and if the hole size is small, the holes can be enlarged by

technical means.

The line-drawing and hole-drilling is the fundamental work for hardware installation, if

the accuracy is not high enough, the future work will be greatly impacted. Thus thegood quality of this work is the necessary precondition to guarantee the quality of the

overall construction.

5.5.6 Installation of Extended Base

I. Installing the expansion bolts

Before fixing the expansion bolts, clean up the dust inside and outside of the holes wi tha vacuum cleaner and measure the hole spacing. For the hole with intolerable error, it

is required to relocate and drill the holes.

Remove the washer and nut from the expansion bolt, put the expansion bolt and the

sleeve into the hole vertically. Then, strike directly on the bolt with a rubber hammer





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until the sleeve of the expansion bolt is completely driven into the ground. Then, install

the insulating washers, big flat washers (to replace the washers contained in theexpansion bolts), spring washers and nuts in the expansion bolts. Fasten the nuts to

45 N∃m with a torque wrench. Pull the expansion bolt until it expands totally. Finally,

take down the nuts, spring washers and flat washers.

II. Installing the extended base

Align the installation holes of the extended base assembly to the corresponding

expansion bolts. Use nuts, spring washers and flat washers to fix the extended baseassembly on the ground. Then tighten bolt to 45 Nm (torque) with a Torque spanner.

Fasten the nuts on the extended base assembly alternatively to reduce the stress

between the bolts and the extended base.

5.5.7 Install the Checkered Plate As shown in Figure 5-20, install the checkered aluminium plate on the surface of the

extended base assembly with M5X10 sunk screws.

(1) Checkered aluminum plate (2) M15 sunk screw

Figure 5-20 Checkered aluminum plate installation

5.5.8 Cabinet Installation

I. Installing the cabinet

When installing and fixing the cabinet, install the insulating spacer and the insulating

washers as shown in Figure 5-21. Secure the cabinet on the extended base assemblywith bolts and washers. Tighten the bolt to 45 Nm (torque) with a Torque spanner. Then,

make sure that the washers attached with the expansion bolts are replaced with big flatwashers.

Fasten the bolts alternatively to reduce the stress between the bolt and the lower frame.

Make sure that insulating spacers are added under the cabinet and insulating washers

are installed in the fasteners so that the whole equipment is insulated from the ground





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before connected with the ground cable, thus effectively satisfy the insulation

requirement.

II. Leveling the cabinet

Place a level bar in vertical directions on the top-plane of the cabinet to check theleveling of the cabinet. Adjust the leveling by adding spacers beneath the base of thecabinet if the error exists, as shown in Figure 5-21.

(1) M12%35 bolt (2) Spring washer 12 (3) Big flat washer (4) Insulating washer

(5) Washer (6) Insulating spacer

Figure 5-21 BTS312 cabinet installed on an extended base


Set the multimeter to the ohm range and measure the resistance between the cabinet

and the extended base. If the circuit is disconnected, it indicates that the cabinet is notinsulated. In this case, check if any insulating washer or insulat ing spacer is missed, or

if any insulating washer is damaged. Repeat the cabinet installation procedure andthen check the insulation again.





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5.6 Installation on the Anti-static Floor

A600 series supports are adopted for BTS312 cabinet installation in the equipment

room with anti-static floor.

5.6.1 Brief Introduction on the Supports

I. Profileof the supports

(1) Connecting holes of BTS cabinet (2) Upper support (3) Lower support (4) Installation hole

Figure 5-22 The profile of A600 series support

II. Support assemblies

There are four types of A660 series support assemblies: three adjustable assemblies

and one fixed assembly. For the adjustable heights of each assembly, refer to the tablebelow.

Table 5-2 Table ofadjustable heights of B550 series support assemblies

Assembly Applicable antistatic floor height (mm)

I 195~230

II 231~300

III 301~445

IV Customized for the flooring height (minimum height 140 mm)

Note that the antistatic floor height refers to the distance between the upper surface of the antistatic floor and the concrete ground.

The heights of A600 series I, II, III assemblies can be adjusted stepless within their

adjustable ranges. The heights are adjusted by moving the upper and lower supports.





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A600 series IV assemblies are fixed supports. They mainly apply to ultrahigh and

ultra-low floors. The minimum applicable floor height of this assembly is 140 mm.

III. Support installation mode

The installation of support adopts the floor-bracketing mode, that is, bracket the floor inbetween the cabinet and the support. Then, run the bolts through the antistatic floor tofix the cabinet and the support. In this way, the cabinet can be firmly fixed and

supported.

IV. Support quantities

2N installation supports are used for installing the cabinets, i.e., N cabinets should be

supported with 2N supports. Figure 5-23 is the schematic diagram of BTS312 cabinetinstallation on the antistatic floor.

Figure 5-23 BTS30 cabinet installation on the antistatic floor





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5.6.2 Installation Process

Fixing the suppor t

Cabinet installation

Positioning thesupport

Locating the cabinet

Start the installation

Insulation test

Test passed?

Complete the

installation

Figure 5-24 Flow chart of installation on the antistatic floor

5.6.3 Positioning the Cabinet

I. Locating the cabinet

Determine the location for power cabinet installation according to the equipment room

layout. When locating the cabinet, try to avoid the interference between the installationsupports and the antistatic floor framework. Try as much as possible to keep the

intactness of the framework. If the interference is unavoidable, remove the floor framework at the place where the interference occurs during the instal lation.





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II. Marking

Place the template on the antistatic floor in accordance with the cabinet layout. Mark

the connecting holes (each cabinet has four connecting holes) of all the cabinets onthe ground according to the template diagram. See the template diagram in the Figure

5-25. The semicircle notch of the template indicates the right ahead direction for thecabinet.

III. Drilling holes

Remove the template and drill a through hole at the marked place for each connecting

hole on the antistatic floor with av20 drill bit.

Back

Front

RightLeft

Connecting hole

Figure 5-25 Marking and drilling for the BTS312 cabinet

5.6.4 Locating the Support

I. Positioning and marking for the support

Place the support below the antistatic floor. Align the connecting holes of the support

with the holes on the antistatic floor. Take the installation hole of the support as the

template. Mark the position for the expansion bolt on the cement ground.

Caution:

The connecting holes at the outer side of the support should be aligned with the floor holes as is shown in

Figure 5-26. The support should not stick out of the cabinet.





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(1) Antistatic floor (2) Connecting hole (use the outer side)

Figure 5-26 The connection between the connecting holes of the support and the holes on the antistaticfloor

II. Drilling

Use av16 bit to drill a hole that is 70 mm deep on the ground where it is marked with

the expansion bolt.

Hold the percussion drill (or electric rubber) vertical to the ground during drilling. Holdtight the drillstock to keep in the right direction, vibrations may damage the ground and

incline the hole.

Before drilling, use a vacuum cleaner to remove the dust. Clear all the garbage in theequipment room before the staffs leave the equipment room every day.

If the ground is too hard and smooth to settle the drill bit, punch a pit with a chisel tohelp positioning the hole.

Drawing and drilling is the fundamental for the equipment hardware installation. If the

results are not accurate, it will bring trouble for the future work. Therefore, the quality atthe initial stage is the prerequisite for the quality of the whole project.

III. Installing expansion bolts

Before fixing the expansion bolts, clean the dust inside and outside the hole with avacuum cleaner, then measure the hole diameters. For the hole with intolerable error, it

should be located and drilled again.

Put the expansion bolts perpendicularly into the installation holes. Strike carefully on

the bolts with a hammer until the expansion tubes of the expansion bolts arecompletely buried into the ground. Then, install the insulating washer, big flat washers

(to replace the washers contained in the expansion bolts), spring washers and nuts in

the expansion bolts. Tighten the nuts to 45 N∃m with torque wrench. Pull theexpansion bolt until it expands totally. Finally, take down the nuts, spring washers and

flat washers.





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IV. Adjusting the height of support

Adjust the supports to the predefined heights, finely adjust the height-lock bolt of the

support on the upper support to such an extent that they will not slip down. Put thesupport back to its installation position and run the expansion bolt through the

installation hole of the support.

5.6.5 Fix the Support

Align the hole on the antistatic floor with the connecting holes of the support . Screw the

M12 % 75 bolts from top to bottom. Meanwhile, place the flat washer, spring washer,

and insulating washer (for the purpose of increasing the contact area) as is shown inFigure 5-26.

Gently strike the hammer to finely adjust the support height so that the antistatic floor falls on its original place on the framework. Make sure that that the upper plane

presses against the antistatic floor. Then, screw the tightening bolt on the antistaticfloor.

Tighten the expansion bolt to 45 Nm with a Torque spanner. Fasten the boltsalternatively to reduce the stress between the bolt and the supports.

Tighten the height-lock bolt to 45 Nm with a Torque spanner. The bolts in the middle

should be tightened first and then those at both sides. Figure 5-27 is the bolt positiondiagram.

& Note:

The fastening sequence of the three bolt sets should be performed in strict accordance with the

above-mentioned procedure.





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(1) Spring washer 12 (2) M12%75 bolt (3) Flat washer 12

(4) Insulating washer (5) Antistatic floor (6) Height-lock bolt (in the middle)

(7) Anchor bolt for the floor (8) Height-lock bolt (at the side) (9) Expansion bolt

The bolt fastening sequence: anchor bolt for the floor δexpansion boltδheight-lock bolt (first in the middle and then thesides)

Figure 5-27 Position of fastening bolts

5.6.6 Cabinet Installation

Restore the antistatic floor to its original status.

Remove the fixed bolts of the antistatic floor.

Uplift the cabinet to the predefined location. Use the bolts to connect the cabinet to the

antistatic floor and the supports. Note that at this step, it is necessary to cover the boltswith insulating washers as shown in Figure 5-27 .


Set the multimeter to ohm range. Contact the cabinet and the connecting bolt with the

two probes of the multi -meter. Measure the electric resistance between them. If thecircuit is disconnected, complete the installation. Otherwise, it indicates that the

cabinet is not insulated. In this case, check if any insulating washer or insulatingspacer is missed, or if any insulating washer is damaged. Repeat the cabinetinstallation procedure and then check the insulation again.

5.7 Connection and Fixing of Combined BTS312 Cabinets

For cabinets to be combined, remove the shield cover plate on the combined cabinets

and the fasteners, and adhere shielding strips on the surface of the combined cabinet joints. When all the cabinets are in position, they should be tightly appressed. Run thefasteners through the connecting holes (four holes) the on the cabinet side to connect

the two cabinets, as shown in Figure 5-28 and Figure 5 -29, and then use fasteners toconnect the cabinets at the cabinet-top, as shown in Figure 5 -30.





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During the installation, make sure to protect the cabinets from being damaged or

scratched by the tools.

(1) Shield cover and fastener of the side door

Figure 5-28 Removal of the shield cover and fasteners of combined cabinet





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(1) Shielding strip and fasteners for combined cabinets

Figure 5-29 Removal of the shield cover and fasteners of combined cabinets





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(1) Joint piece (2) M12 screw (3) Spring washer φ12 (4) Flat washer φ12

Figure 5-30 The connection at the top of combined cabinets





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5.8 Antistatic Requirements for Installing Boards and Modules

Each board and module have static-sensitive parts, therefore, keep the following

antistatic requirements in mind when installing and replacing the boards or modules:

1) Before installing the boards or modules, insert the plug of the antistatic wrist strap inthe antistatic socket of the cabinet side door. See Figure 5-31.

& Note:

If the antistatic wrist strap has a clip, remove the clip to reveal the plug.

2) Put the antistatic wrist strap on the wrist (it can be on the left han d or the right hand,and it is subject to the convenience);

3) Keep the antistatic wrist strap on the wrist throughout the entire installation

procedure, as shown in Figure 5-32;4) Wear the antistatic wrist strap when removing or replacing boards or modules.

Figure 5-31 The antistatic wrist strap is inserted in the antistatic socket





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Figure 5-32 Operation with antistatic measurement

5.9 Installation of Switch Box, Fan Box and Plug-in Frame

The cabinet holds the switch box, big fan box, TRX & CDU plug-in frame, air guide box,

small fan box, common resource plug-in frame and air intake box from top to bottom.In the maintenance of the cabinet, these plug-in frames and plug-in boxes may beinserted and extracted.

Caution:

The insertion and the extraction of the plug-in frame/box must be undertaken by qualified personnel

trained by Huawei. The air guide box and air intake box are part of plug-in frame and they have to be

inserted or extracted together with the plug-in frame.

5.9.1 Installing the Fan Box

When installing the fan box, push it slowly along the slide first. After pushing it to theposition, tighten the screws on the panel, as shown in Figure 5 -33. The procedure of

removing the fan box from the cabinet is exactly reversed.





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?

?

?

?

(1) Big fan box (2) Small fan box (3) Guide rail (4) Guide rail

Figure 5-33 Installation of the fan box

Caution:

1) During installation of the fan box, align the 4 power plugs on the back of the fan box with the power sockets on the cabling rack on the back of the cabinet.

2) During the removal of the fan box, pull it out slowly to avoid damage to the power plugs and sockets.





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5.9.2 Installing Other Boxes

When installing the switch box, windshield box, and air guide box, first push themslowly along the guide. After they are in position, tighten the screws on the panel. The

removal procedures are reversed.

Caution:

Since there are many power cables in the switch box, there is a limited room for one to pull them out. Do

not pull them violently, or the power plug on the backplane might be pulled off.

5.10 Installation of Boards

Caution:

Before installing a board or module, please confirm whether it is necessary to set the DIP switches or

jumpers on the backplane or on the board/module.

Please refer to "6 DIP Switch Settings" for the setting of DIP switches and jumpers.

Common resource plug-in frame is at the bottom of the cabinet. The boards in this

frame are all ordinary boards. There are some connectors on the rear side of theboards, which are connected to the backplane. There is a metal handle bar on the

facade of the board, which is used to insert and extract the boards.

Please install the boards with the following procedure:

1) Align the board with the slot and push it slowly along the guide rail until it cannot be

pushed any further.

2) Tighten the screws on the panel.

Caution:

1) Before the installation, please clean the cabinet and the frame first.

2) Please wear antistatic wrist strap, or discharge the static on the body by touching the case before

touching the board.

3) Please insert the board according to the label pasted on the name plate. Do not insert the board into a

wrong slot.

4) Insert the board into the frame vertically and the boards are interconnected through the system bus on

the backplane.

5) Do not force the board into the slot to avoid damage to the pins.





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5.11 Installation of Functional Modules

CDU, TRX, PSU and PMU modules are installed respectively in TRX & CDU frame

and common plug-in frame.

When installing CDU, TRX, PSU and PMU modules, a lign the board with the positionsmarked with their corresponding board name. Push them slowly along the guide and

tighten the screws.

Figure 5-34 shows the installation procedure of TRX module, the installation of other

modules is similar to this.

?

(1) TRX

Figure 5-34 Installation of TRX module





03D-0412-20020510- 400 5-34

Caution:

When screwing the anti-loose screws, do not increase your force if there is some difficulty in driving the

screw in, so as to prevent from breaking the screw. The right method is to re-install functional module, to

fit its installation hole to the installation hole of the frame.

5.12 Installation of Front/Rear Door

In the maintenance of the cabinet, it may need to remove the front door and the rear door.

5.12.1 Removal of the Front Door

Open the front door and operate in the following way to remove the door, as shown in

Figure 5-35:

1) Open the front door to form an included angle bigger than 90°with the cabinet so

as to see the door pin and the hinge.

2) Uplift the front door so as to separate the door pin from the hinge of the cabinet.

3) After the door pin has been separated from the hinge, remove the front door.

Figure 5-35 Install/Remove the front door

The procedure of door installation is just the opposite as the above-mentioned steps.





03D-0412-20020510- 400 5-35

Caution:

1) To close the door, first press against the door and then rotate the locking stalk clockwise.

2) When removing the front door, take out the grounding cable on the front door first and reconnect the

grounding cable after the front door is installed.

5.12.2 Removal or Installation of the Rear Door

The installation or removal of the rear door can be realized by installing/ removing the

six screws on the rear door.

Caution:

When the cabinet is installed against the wall, first remove the cabinet from the installation base and then

proceed to the removal of the rear door.

5.13 Installation, Removal and Dust Cleaning of the Dust Filter

BTS dust filter is installed on the front door, between the front door and the cover plateof dust filter, as shown in Figure 5-36.





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(1) Dust filter (2) Fastener (3) Holddown of dust filter

Figure 5-36 Cover plate of dust filter and the dust filter

When installing the dust filter, first put it in the corresponding cover plate along theguides. Pay attention to the burrs on the dust filter to avoid any scar on the cover plate

or the guides, as shown in Figure 5-37.

(1) Sliding rail (2) Cover plate of dust filter (3) Dust filter (4) Stop screw

Figure 5-37 Placing the dust filter in the cover plate





Then, insert the dust filter cover (including the dust proof screen) into the slot of the

front door. Then, tighten the screws on the bolts of the cover plate on the front door, asshown in Figure 5-38.

(1) Unfix the fastener (2) Remove the dust filter along the arrow direction (3) Uplift the dust filter

Figure 5-38 Installation of the dust filter

The removal of the dust filter is undertaken in the reversed procedure of its installation.

Clean the dust filter with a vacuum cleaner.

Caution:

When cleaning, remove the dust filter first and then place it on the desk. Clean the filter with a vacuum

cleaner. After certain period of service, replace it in time.

5

05 installing the cabinets

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