ot928g user guide-hardware installation

SmartAX OT928G User Guide 2 Hardware Installation

Issue 01 (2008-06-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. 2-1

2 Hardware Installation

About Thi

T e lists the c

s Chapter

he following tabl ontents of this chapter.

Section Description

2.1 Packing List This section describes how to check the OT928G components according to the packing list before the installation.

2.2 Installation and ons

This section describes the precautions for installing and Maintenance Precauti maintaining the OT928G.

2.3 Installing the ow to install the OT928G. OT928G

This section describes h

2.4 Installing Cables escribes the routing rules and installation This section dprocedures of cables.

2.5 Checking the Installation

the checklist of the OT928G after the installation. This section describes

2.6 Power-on Check This section describes how to power on and check the OT928G after the installation.

2 Hardware Installation SmartAX OT928G

User Guide

2-2 Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd. Issue 01 (2008-06-30)

2.1 Packing List Before installing the OT928G, check its components according to the packing list before the installation. For the packing list, refer to the SmartAX OT928G Quick Start.

2.2 Installation and Maintenance Precautions This section describes the precautions for installing and maintaining the OT928G.

Basic Requirements Read through this guide before installing and using the device. Keep the device dry when it is stored, transported, or used. Avoid any collision when the device is stored, transported, or used. Do not dismantle the device. Contact the dedicated maintenance department when the

device is faulty. Without authorization, any organization or person shall not change the device in

structure and safety design. Otherwise, the consequences caused there from shall be taken by the organization or person concerned.

Environment Requirements Place the device in a ventilated environment without direct sunlight. Keep the device clean. Avoid dust accumulation. Leave more than 10 cm around and above the device for heat dissipation. The heat dissipation net is used for ventilation. Do not block or cover it. Do not place the device on an unstable workbench or box. Otherwise, the device might

be severely damaged if it falls. Do not put any objects on the device. Otherwise, the device might be damaged due to

high temperature or extrusion. Do not place the device on any flammable material, such as foam. Place the device away from heat source or naked flame, such as electric heater or lit

candle. Place the device away from electromagnetic interference source, such as microwave

oven, refrigerator, and cell phone.



Usage Precautions The voltage of the power supply must meet the input voltage requirement. After the device is powered off, wait at least 10s before next power-on. Before connecting or disconnecting any cables, stop using the device and turn off the

power supply. Keep your hands dry before connecting or disconnecting any cables. Do not trample, drag, or over bend cables to avoid device fault. Do not use damaged or aged power cables. Turn off the power supply and unplug the power connector if the device is not used for a

long time. Do not look directly at the optical port lest your eyes be burnt. For any abnormal cases, such as device smoking, audio exception, and peculiar smell,

turn off the power supply and unplug the power connector. At the same time, contact the dedicated maintenance department.

Prevent any object (such as metal) from entering the device from the heat dissipation net. Do not open the shell of the device when the device is running (even if no power is used)

to avoid electric shock.

Cleanness Precautions Before cleaning the device, stop using it and turn off the power supply. Use a soft and dry cloth to clean the shell of the device. Keep the power connector clean and dry to avoid electric shock.


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2.3 Installing the OT928G This section describes how to install the OT928G.

The OT928G can be placed on the workbench, mounted onto the wall, or installed in the cabinet.

Cabinet installation: The OT928G can be installed in a 19-inch or 21-inch cabinet by adopting different mounting brackets.

Wall mounting: The OT928G can be mounted onto the wall by adopting 19-inch mounting brackets.

Workbench placement: The OT928G can be directly placed on a workbench by adopting four plastic pads.

2.3.1 Cabinet Installation This section describes how to install the OT928G in the cabinet.

Precautions Wear the ESD wrist strap for installing the OT928G. Select the mounting bracket according to the cabinet type. Install the OT928G into the cabinet with screws, and then fasten the screws in a diagonal

sequence.

As shown in Figure 2-1, the left part shows how to install the 21-inch mounting bracket, and the right part shows how to install the 19-inch mounting bracket.

Figure 2-1 Installing mounting brackets for the OT928G (cabinet installation)

Recommended Tools ESD wrist strap Cross screwdriver (M3–M6)



Procedure Step 1 Wear the ESD wrist strap.

Step 2 Install mounting brackets for the OT928G.

Step 3 Select the position in the cabinet for installing the OT928G, and then install captive nuts according to the chassis position.

Step 4 Use four panel screws to fasten the OT928G to the selected position in the cabinet through the mounting brackets, as shown in Figure 2-2.

Figure 2-2 Installing the OT928G in a cabinet

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2.3.2 Wall Mounting This section describes how to mount the OT928G onto the wall.

Precautions Ensure that the subscriber cables and optical fibers are long enough to reach the nearest

MDF. Select suitable expansion bolts. Here, M6 expansion bolts are recommended. Select a best installation position according to the requirements on installation

environment, taking power supply location and maintenance requirements into account. It is recommended that the OT928G is mounted onto the wall 1.7–2.5 m high from the ground.

It is forbidden to put any flammable or explosive materials under the OT928G.


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Use 19-inch mounting brackets, as shown in Figure 2-3.

Figure 2-3 Installing mounting brackets for the OT928G (wall mounting)

Recommended Tools Measuring and marking tools: measuring tape, ruler (1 m), marker pen, powder marker,

pencil. Drilling tools: punch tool, percussion drill, matching drill bits, vacuum cleaner. Clamping tools: cross screwdriver (M3–M6). Auxiliary tools: brush, rubber hammer.

Procedure Step 1 Mark two holes on the wall for mounting the OT928G. Measure the length between the two

holes for a double check, as shown in Figure 2-4.

Figure 2-4 Marking two holes on the wall for mounting the OT928G

465mm465 mm

Step 2 Select a suitable drill bit according to the external diameter of the expansion bolt. Drill holes with the percussion drill on the marked positions, as shown in Figure 2-5.

When you drill the holes, hold the drill tight. Do not shake as it might lead to sloping holes. Keep the bit vertical to the wall.

Keep the depth of both holes the same. Use the punch tool to chisel a pit to help position the bit if the wall is too hard or

slippery. Clean the dust inside and outside the hole with the vacuum cleaner and brush.



Figure 2-5 Drilling holes

Step 3 Insert two expansion bolts vertically to the holes, and knock them into the holes with the rubber hammer, as shown in Figure 2-6.

Figure 2-6 Installing expansion bolts


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Step 4 Face the cable connecting side of the device downward. Align two holes on the upper parts of two mounting brackets to the expansion bolts in the wall. Adjust the position of the OT928G, and then screw the flat washer, spring washer, and nut onto each bolt, as shown in Figure 2-7.

Figure 2-7 Installing the flat washer, spring washer, and nut

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2.3.3 Workbench Placement This section describes how to place the OT928G on a workbench.

Precautions Ensure that the desk or workbench is stable. Do not put heavy objects on the chassis. Leave enough space around the OT928G for heat dissipation.

Procedure Step 1 Stick the four plastic pads in the delivery accessories to the pits at the bottom of the OT928G.

Step 2 Select a suitable platform to place the OT928G.

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2.4 Installing Cables This section describes the routing rules and installation procedures of cables.

2.4.1 Routing Rules This section describes the routing rules of cables.

Bundling Cables Comply with the following rules when bundling cables:

Bundle power cables and signal cables separately. Bundle cables evenly with equal space between cable ties. Do not bundle cables too tightly or drag cables. Arrange all cable ties in the same direction without any sharp edges at the ends. Coil the redundant optical fibers and cables.

Turning Cables Comply with the following rules when turning cables:

To prevent damage to cable cores, avoid bending the cables excessively. Curvature radius of the cable at the turning point is twice larger than its diameter. The

curvature radius near the connector is four to six times larger than the cable diameter. Do not bundle cables at the turning. Arrange the bundled cables close to each other.

Routing Cables Comply with the following rules when routing cables:

Decide the specifications, path, cross sectional area, and position of cables according to the construction drawing.

Arrange cables neatly and avoid damaging the cable sheath. Route different types of cables separately. Consider maintenance and expansion in the future. Ensure that cable connectors made on site are standard, firm and reliable. Power cables, ground cables, and various signal cables must be connected firmly and

reliably at both ends. Transfer connectors are connected or screwed firmly.


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2.4.2 Connecting Cables This section describes how to connect various cables.

Recommended Tools Small tools: diagonal pliers, pincer pliers. Clamping tools: cross screwdriver (M3–M6).

Connecting Ground Cables To protect the OT928G against lightning and interference, the ground cables must be connected correctly.

Step 1 Use the cross screwdriver to screw off the grounding screw of the OT928G.

Step 2 Put the ring terminal of the ground cable onto the grounding screw.

Step 3 Fasten the grounding screw on to the grounding bolt of the OT928G.

Step 4 When installing the OT928G in a cabinet, connect the other end of the ground cable to the grounding point of the cabinet. When mounting the OT928G onto the wall or placing it on a workbench, connect the other end of the ground cable to the grounding busbar of the equipment room.

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Connecting Uplink Optical Fibers Connect uplink optical fibers through the GPON optical port. Select the G.652 optical fiber with the SC/PC connector.

Step 1 Connect one end of the optical fiber to the GPON port of the OT928G.

Step 2 Connect the other end of the optical fiber to the uplink optical splitter, which transmits optical signals upstream to the optical line terminal (OLT).

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Connecting Network Cables Connect network cables through the Ethernet (ETH) port. Select the straight through cable or crossover cable with the RJ-45 connector.

Step 1 Connect one end of the network cable to the ETH port of the OT928G.

Step 2 Connect the other end of the network cable to the PC, set top box (STB), or LAN switch.

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Connecting E1/T1 Cables Connect E1/T1 cables through the E1/T1 port. Select the 75-ohm coaxial cable or 120-ohm twisted pairs with the RJ-45 connector.

Step 1 Connect one end of the E1/T1 cable to the E1/T1 port of the OT928G.

Step 2 Connect the other end of the E1/T1 cable to the PBX or base station.

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Connecting Power Cables Use the external power cable to connect the power port of the OT928G to the power socket.

Before the connection, ensure that the device is powered off.

Step 1 Connect one end of the power cable to the power port of the OT928G.

Step 2 Connect the other end of the power cable of OT928G-A to the 100 – 240 VAC power socket;

or

connect the other end of the power cable of OT928G-D to the -48 – -60 VDC power socket

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2.5 Checking the Installation This section describes the checklist of the OT928G after the installation.

Checking Cable Connections Table 2-1 provides the checklist of cable connections.

Table 2-1 Checklist of cable connections

Item Description

Power cables and ground cables are connected reliably and correctly.

The routing of power cables and ground cables complies with the engineering design, making it easy for maintenance and expansion.

Power cables, ground cables

Power cables and ground cables are routed smoothly and bundled neatly. Proper margins are reserved at the turning.


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Item Description

Bundle signal cables or optical fibers moderately at the turning.

The routing of signal cables and optical fibers complies with the engineering design, with equal space between cable ties.

Signal cables and optical fibers are routed smoothly.

All signal cables and optical fibers are arranged and bundled neatly, without any damage on the cable or fiber sheath.

Signal cables, optical fibers

Proper margins are reserved for signal cables and optical fibers. Cable ties are cut smooth without any sharp edge or crossover.

Checking Installation Environment Table 2-2 provides the checklist of the installation environment.

Table 2-2 Checklist of the installation environment

Item Description

The installation position of the device complies with the engineering design.

The device is installed reliably, in compliance with the shockproof requirements in the engineering design.

Device

All bolts are fastened correctly and reliably.

Cabling trough No sundries such as cable ties or cable segments can be found around the device or the cabling trough. All parts are smooth and clean.

2.6 Power-on Check This section describes how to power on and check the OT928G after the installation.

Powering On the OT928G Before powering on the OT928G, ensure that the installation meets the requirements.

Step 1 Use the multimeter to check whether the input voltage is in the allowed range (100 – 240 VAC, -48 – -60 VDC).

Step 2 Turn on the power switch of the OT928G.

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Checking LED Status Check whether the OT928G can be powered on normally according to the LED status, as shown in Table 2-3.

Table 2-3 LED status

Name Color Status Description

On The device is powered on normally. PWR (Power LED)

Green

Off The power cable is connected incorrectly or the device is faulty.

Powering Off the OT928G Turn off the power switch of the OT928G.

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