Huawei CBTS3612-800 Maintenance Manual

User Manual

ntents

Airbridge cBTS3612-800 12-carrier CDMA Base Station Table of Co

Table of Contents

1 Overview ......................................................................................................................................1-1

1.1 Purposes of cBTS3612-800 Routine Maintenance ............................................................1-1

1.2 Classification of cBTS3612-800 Routine Maintenance Operations...................................1-1

1.2.1 Classification According to Implementing Methods.................................................1-1

1.2.2 Classification by Period Length...............................................................................1-1

1.3 Guide to the Usage of cBTS3612-800 Routine Maintenance records and cBTS3612-800

Routine Maintenance Instructions............................................................................................1-2

1.3.1 cBTS3612-800 Daily Unexpected Fault Handling Record......................................1-3

1.3.2 cBTS3612-800 Monthly Maintenance Record.........................................................1-4

1.3.3 cBTS3612-800 Quarterly Maintenance Record ......................................................1-5

1.3.4 cBTS3612-800 Yearly Maintenance Record...........................................................1-6

2 cBTS3612-800 Monthly Maintenance Instructions..................................................................2-1

3 Quarterly Maintenance Instructions .........................................................................................3-1

4 cBTS3612-800 Yearly Maintenance Instructions.....................................................................4-1

5 Return Loss, VSWR and Reflection Coefficient ......................................................................5-1

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User Manual

Overview

Airbridge cBTS3612-800 12-carrier CDMA Base Station 1

1 Overview

cBTS3612-800 Routine Maintenance Instructions describes in details the contents and methods of cBTS3612-800 routine maintenance operations. It serves as a reference in determining the routine maintenance schedule of a particular site. cBTS3612-800 Routine Maintenance consists of:

1) Purpose of cBTS3612-800 routine maintenance;

Classification of cBTS3612-800 routine maintenance operations;

3) Logging of routine maintenance operations.

1.1 Purposes of cBTS3612-800 Routine Maintenance

Normal system operation of cBTS3612-800 in different running environment depends on effective routine maintenance. cBTS3612-800 routine maintenance is intended to detect and solve problems in due time to prevent trouble.

1.2 Classification of cBTS3612-800 Routine Maintenance Operations

1.2.1 Classification According to Implementing Methods

I. Conventional maintenance

To observe the operation of the system, and test and analyze equipment performance during system operation.

II. Unconventional maintenance

To test if the performance of system equipment has degraded by artificially creating some faults and observe system performance with these faults. For example, maintenance personnel may artificially create some faults and test if the alarm system reports alarm correctly.

1.2.2 Classification by Period Length

I. Unscheduled maintenance

Maintenance operations incurred by equipment fault or network adjustment. For example, maintenance tasks triggered by user complaint, damage of equipment and

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User Manual

Overview

Airbridge cBTS3612-800 12-carrier CDMA Base Station 1

line fault. Solving of problems left over by daily maintenance operations is also regarded as unscheduled maintenance operation.

II. Daily maintenance

Maintenance tasks conducted daily. cBTS3612-800 Daily maintenance helps maintenance personnel keep track of the operating conditions of the equipment at any moment so that problems can be solved in time. When a problem is detected in daily maintenance, record it in detail to help eliminate it in time.

III. Periodical maintenance

Maintenance tasks conducted regularly. Periodical maintenance helps maintenance personnel keep track of the long-term performance of the equipment.

Periodical maintenance includes: monthly maintenance, quarterly maintenance and yearly maintenance.

1.3 Guide to the Usage of cBTS3612-800 Routine Maintenance records and cBTS3612-800 Routine Maintenance Instructions

1) Note down in details the unexpected faults occurred in cBTS3612-800 daily

maintenance operations in cBTS3612-800 Daily Unexpected Fault Handling Record for future reference. The user may modify the record according to the actual needs, or compile the records into manuals.

Note down in details the actual maintenance operations carried out during cBTS3612-800 monthly maintenance in cBTS3612-800 Monthly Maintenance Record. For details, see cBTS 3612 Monthly Maintenance Operation Instruction.

Note down in details the actual maintenance operations carried out during cBTS3612-800 quarterly maintenance in cBTS Quarterly Maintenance Record. For details, see cBTS 3612 Quarterly Maintenance Operation Instruction.

4) Note down in details the actual maintenance operations carried out during

cBTS3612-800 yearly maintenance in cBTS3612-800 Yearly Maintenance Record. For details, see cBTS 3612 Yearly Maintenance Operation Instruction.

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User Manual

Overview

Airbridge cBTS3612-800 12-carrier CDMA Base Station 1

1.3.1 cBTS3612-800 Daily Unexpected Fault Handling Record

Site

Time when fault occurred:

Person on duty:

Classification of fault:



Primary power supply



Secondary power supply



Base Band Subrack



RF Subrack

Fault detected:

? With user complaint ? From the alarm system ? In Daily maintenance ? From other sources

Description of fault:

Alarm Handling & Result:

Belong-to BSC Time when fault is

solved: Handled by:



CDU/DFU/RLDU Subrack



Antenna & Feeder System



Others

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User Manual

Overview

_(MM)_____(DD)_____(YY)

Airbridge cBTS3612-800 12-carrier CDMA Base Station 1

1.3.2 cBTS3612-800 Monthly Maintenance Record

Site: _______________

Time of maintenance:___ ____(MM)____(DD)____(YY)

Items Status Remarks

Environment Temperature Humidity Dust-proof performance Indoor air-conditioner Call test Battery group

Grounding, lightening protection and power supply system

RF antenna and feeder part Satellite antenna and feeder part Secondary power supply

Description of fault and handling measures taken

Problems remained

Monitor check

Maintainer:



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal

Maintenance

personnel

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User Manual

Overview

maintenance:____(MM)_____(DD)_____(YY)

Airbridge cBTS3612-800 12-carrier CDMA Base Station 1

1.3.3 cBTS3612-800 Quarterly Maintenance Record

Site: _______________

Time of ____(MM)____(DD)____(YY)

Items Status Remarks Maintenance personnel Primary power supply Fans Road test Alarm collection equipment

Description of fault and handling measures taken

Problems remained

Monitor check

Maintainer:



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal

When available

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User Manual

Overview

ntenance:____(MM)_____(DD)_____(YY)

Airbridge cBTS3612-800 12-carrier CDMA Base Station 1

1.3.4 cBTS3612-800 Yearly Maintenance Record

Site: _______________

Time of mai ____(MM)____(DD)____(YY)

Items Status Remarks

Call test Cabinet sanitation BTS power output Grounding resistance and grounding wires

Water-proof performance of antenna and feeder connector and lightening protection grounding clip

Firmness and angle of antenna

Description of fault and handling measures taken

Problems remained

Monitor check

Maintainer:



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal



Normal, Abnormal

Maintenance

personnel

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User Manual

800 Monthly Maintenance

Instructions

Airbridge cBTS3612-450 12-carrier CDMA Base Station

2 cBTS3612-800 Monthly Maintenance

Instructions

2 cBTS3612-

Items

Call test

Grounding, lightening protection system (including E1 lightening protection board) and power supply system

Antenna and feeder part

Secondary power supply

Instructions

Make calls with an MS. Collect information at both the MS and the BSC to see if all calls are normal for all sector carriers.

1) Check the connections in the grounding system and the lightening protection system.

2) Check if the power supply system is normal.

3) Check if any part of the lightening protector is burnt.

1) Check if there is any VSWR alarms;

2) Check if the support of the antenna is set to the correct direction;

3) Check if the water-proof performance of the feeder is normal. Check if there is any alarm on the fault of the secondary power supply module.

Note

There should be no noise, no call dropping, nor cross talking.

Keep the lightening protector for the power supply system and the antenna and feeder system in good shape.

Query at the maintenance console.

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User Manual

Quarterly Maintenance Instructions

Airbridge cBTS3612-450 12-carrier CDMA Base Station 3

3 Quarterly Maintenance Instructions

Items

Primary power supply Measure the output voltage. Range of normal output voltage: -40- 60V.

Fans

Road test

VSWR

Alarm collection equipment

Equipment room environment

1) Check if the fans are working normally.

2) Check if there is any alarm reported on the fault of fans.

Test on the handoff and coverage area of the cells with a test MS.

Check at the maintenance console if there is any VSWR alarms.

Check if the alarm collection equipment (including that on humidity, temperature and fire) is normal.

Check the temperature, humidity, dust-proof performance, and anti-static performance of the equipment room.

Instructions

Alarm may be triggered when:

1) Some of the fans are unable to rotate;

2) Temperature of some of the fans is abnormal;

3) Fan rotational speed control is faulty.

Note

Temperature: -5C~50C. Relative humidity: 5%~90%.

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User Manual

Yearly Maintenance

Instructions

Airbridge cBTS3612-450 12-carrier CDMA Base Station

4 cBTS3612-800

4 cBTS3612-800 Yearly Maintenance Instructions

Items Call test

Cabinet sanitation

BTS power output Test the output power of the RFs.

Grounding resistance and grounding wires

Water-proof performance of antenna and feeder connector and lightening protection grounding clip Firmness and angle of antenna

Instructions Make calls with an MS. Collect information at both the MS and the BSC to see if all calls are normal for all sector carriers.

Tools required: Vacuum cleaner, alcohol and towel.

1). Measure the grounding resistance with proper test instruments.

2). Check if the connector of the grounding wires are normal

1). Check the external parts;

2). Unwrap them and check.

1). Tighten the screw with the wrench.

2). Check if the angle are correctly set.

Note There should be no noise, no call

dropping, nor cross talking. Impose strict operation regulations

to prevent mis- operation on power supply. Check if the output is the same as recorded in the BSC.

Wrap up the checked parts with the same material used before the check.

Do not apply too much force with the wrench.

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User Manual Airbridge cBTS3612-450 12-carrier CDMA Base Station 5 Return Loss, VSWR and Reflection Coefficient

5 Return Loss, VSWR and Reflection Coefficient

Return loss(dB)

10 1.92495 0.31623 11 1.78489 0.28184 12 1.6709 0.25119 13 1.57689 0.22387 14 1.49852 0.19953 15 1.43258 0.17783 16 1.37668 0.15849 17 1.32898 0.14125 18 1.28805 0.12589 19 1.25276 0.1122 20 1.22222 0.1 21 1.19569 0.08913 22 1.17257 0.07943 23 1.15238 0.07079 24 1.13469 0.0631 25 1.11917 0.05623 26 1.10553 0.05012 27 1.09351 0.04467 28 1.08292 0.03981 29 1.07357 0.03548 30 1.06531 0.03162 31 1.058 0.02818 32 1.05153 0.02512 33 1.0458 0.02239 34 1.04072 0.01995 35 1.03621 0.01778 36 1.03221 0.01585 37 1.02866 0.01413 38 1.0255 0.01259 39 1.0227 0.01122 40 1.0202 0.01 41 1.01799 0.00891 42 1.01601 0.00794 43 1.01426 0.00708 44 1.0127 0.00631 45 1.01131 0.00562 46 1.01007 0.00501 47 1.00897 0.00447 48 1.00799 0.00398 49 1.00712 0.00355 50 1.00634 0.00316

4 4.41943 0.63096 5 3.56977 0.56234 6 3.00952 0.50119 7 2.61457 0.44668 8 2.32285 0.39811 9 2.09988 0.35481

VSWR

Reflection Coefficient (Γ)

Formulas for calculating reflection coefficient G, return Loss RL, and VSWR is displayed in the following table:

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User Manual

Uforward+Ureflected

Airbridge cBTS3612-450 12-carrier CDMA Base Station 5 Return Loss, VSWR and Reflection Coefficient

Reflection Coefficient

VSWR

Return loss(dB)

Γ=

Ureflected

Uforward

alg

( )

VSWR−1

VSWR+1

VSWR=

VSWR

Uforward-Ureflected

alg

( )

1+Γ 1−Γ

−

VSWR=

RL=

20lg

Uforward Ureflected

VSWR+1 VSWR−1

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User Manual

Table of Contents

Airbridge cBTS3612-800 12-carrier CDMA Base Station

Table of Contents

1 MS Unable to Access Network..................................................................................................1-1

1.1 About Mobile Station Network Access...............................................................................1-1

1.2 Disabled Mobile Station Network Access...........................................................................1-1

2 Conversation Fault .....................................................................................................................2-1

3 Software Downloading Failure Fault.........................................................................................3-1

3.1 Description of Fault ............................................................................................................3-1

3.2 Fault Analysis and Location...............................................................................................3-1

4 Base Station Initialization Failure Fault....................................................................................4-1

4.1 Description of fault..............................................................................................................4-1

4.2 Fault Analysis and Location...............................................................................................4-1

5 Signaling Link Fault....................................................................................................................5-1

5.1 OML Signaling Link Fault...................................................................................................5-1

5.2 Abis Signaling Link Fault....................................................................................................5-2

6 Part Module Fault........................................................................................................................6-1

6.1 Description of Part Fault.....................................................................................................6-1

6.2 Processing of Common Board Faults ................................................................................6-2

6.3 BTS Control Interface Module (BCIM) ...............................................................................6-4

6.4 BTS Control & Clock Module (BCKM)................................................................................6-5

6.5 BTS Channel Processing Module (BCPM) ........................................................................6-6

6.6 BTS Resource Distribution Module (BRDM)......................................................................6-7

6.7 BTS Transceiver Module (BTRM)......................................................................................6-7

6.8 BTS High Power Amplification (BHPA) Module.................................................................6-9

6.9 Receiving Line Division Unit (RLDU) ...............................................................................6-11

6.10 Power Supply Unit (PSU)...............................................................................................6-11

7 Antenna Feeder Fault.................................................................................................................7-1

7.1 Radio Frequency Antenna Feeder Part.............................................................................7-1

7.2 Satellite Antenna Feeder Part............................................................................................7-1

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User Manual Airbridge cBTS3612-450 12-carrier CDMA Base Station 1 MS Unable to Access Network

1 MS Unable to Access Network

1.1 About Mobile Station Network Access

Once powered on, an MS first enters the System Determination Substate and then selects an analog system or CDMA system based on the parameters predefined in the mobile station by the user. If the CDMA system is selected, the mobile station will attempt to capture it and enters the Pilot Channel Acquisition Substate.

In this substate, the mobile station will first search the primary frequency ban ds for all pilot channels (search all PN offsets), and captures the strongest pilot channel. If there are no pilot channels captured on the basic frequency bands, the mobile station will tune to an auxiliary frequency band and continue searching for a pilot channel. When the mobile station has captured a pilot channel, it enters the Sync Channel Acquisition Substate.

In this substate, the mobile station will attempt to obtain a sync channel and receive synchronization messages. And by means of these messages, the mobile station can obtain the pilot PN offset, network system identity, long code status, system time, paging channel rate, frequency bands on which basic paging channels are, etc. Once this information is obtained, the mobile station will enter the Timing Change Substate.

In this substate, the mobile station will use the pilot PN offset, long code status received in the sync channel messages and synchronizes the long code status and system timing with the CDMA system timing. After that, the mobile station will enter the Mobile Station Idle State.

In the idle status, the mobile station needs to receive the overhead messages on the paging channels. The mobile station cannot work normally unless it has received correct Overhead Messages within the specified period of time.

If all the above conditions are satisfied, the mobile station will normally gain access to a network.

1.2 Disabled Mobile Station Network Access

1.2.1 Description of Fault

When started, the mobile station cannot access the CDMA network.

1.2.2 Fault Analysis and Location

Before locating any base station fault, make sure that the parameters for a mobile station are correctly set, such as the basic frequency band, auxiliary frequency band, SID, NID, etc.

I. Base station not in service

The base station is not in service and the mobile station cannot gain access to a network. The causes for the base station not to be in service include:

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User Manual Airbridge cBTS3612-450 12-carrier CDMA Base Station 1 MS Unable to Access Network

The base station equipment in a faulty status makes the base station fail to be in service.

The base station has not obtained correct configuration data, which leads to the base station not being in service.

For the troubleshooting details, please refer to "4 Base Station Initialization Failure Fault".

II. Abis signaling link fault

Abis signaling link fault will disable the network access of a mobile station.

If any fault occurs to the Abis signaling link after a base station has been in service, BSC cannot implement any logical configuration for the base station and accordingly the mobile station cannot gain access to a network.

If a base station has obtained its logic configuration, when any fault occurs to the Abis signaling link, the base station will cut off the transmission signals of BTRM corresponding to all sector carriers and this makes a mobile station unable to gain access to a network.

At an OMC or near-end maintenance console of a base station, query the current alarm of the base station to make sure whether there exists any "Abis signaling link fault" alarm.

For the troubleshooting details, please refer to "5.2 Abis signaling link fault".

III. A cell has not obtained the logic configuration of BSC

If a cell has no logical configuration, that is to say, such common channels as pilot, synchronization, paging, etc. have not been established or overhead messages not updated, the mobile station naturally cannot gain access to a network.

View the confiuguration process report of a cell at the OMC maintenance console. If the cell does not report the process of "Common channel successfully established" and "Overhead message successfully updated", it shows that the cell has no logic configuration.

Unavailable physical equipment or operation & maintenanace (for example, deletion of the equipment) results in the deletion of a logic cell, therefore the mobile station cannot gain access to a network.

View the configuration process report of a cell at an OMC maintenance console. If the cell reports the process report of "Cell deleted", it shows that the cell has been deleted.

In addition, you may query whether a cell has its logic configuration via the "Cell Status Query" command at the OMC maintenance console.

If a cell has not obtained its logic configuration, then check point by point:

Whether the BTRM used in this cell works normally.

l Whether the BCPM used in this cell works normally.

Whether the corresponding BRDM works normally.

l Whether the optical fiber of BTRM and that of BRDM are correctly connected.

Whether BCIM works normally.

Whether the Abis signaling link is in connected status.

l Whether BSC works normally.

Check the configuration parameters of BTS and BSC and make sure that they are in accordance.

If any problem is found at some step, handle it according to the corresponding chapter or section. For example, a BTRM module fault should be handled as described in "6.5 BTS Transceiver Module (BTRM)".

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User Manual Airbridge cBTS3612-450 12-carrier CDMA Base Station 1 MS Unable to Access Network

IV. This cell is in blocked status

If you see at the OMC maintenance console that the logic configuration of a cell has been completed, but the mobile station still cannot gain access to a network, then you can check whether this cell is in blocked status.

When a cell is in blocked status, the base station will cut off the transmission signals of BTRM corresponding to this cell carrier and this makes the mobile station unable to gain access to a network.

You may query BTRM status at the OMC maintenance console to see whether the BTRM corresponding to this cell has been blocked.

If the cell is in blocked status, the mobile station cannot gain access to a network until the user has unblocked it.

V. Abnormal receiving channel

An abnormal BS receiving channel will lead to excessive receiving error codes and frequent mobile station dropouts. The mobile station, when started, will send a power-on registration message to the system. However, the base station cannot receive this registration message because of a faulty receiving channel. Thus, the base station will not send any base station answer instruction to this mobile station, which leads to failed registration of this mobile station. Because of failed registration, the mobile station enters the system defining sub-status and recaptures the system. When the system is captured, the mobile station will start again the power-on registration. Such things happen repeatedly, so that the mobile station cannot gain access to a network.

You may test the mobile station via CDMA and trace air interface messages. If the mobile station sends "Registration message" but does not receive any "Base station answer instruction" message, it shows that some fault has occurred to the reverse receiving channel of the base station.

If there exists any receiving channel abnormality, you may check point by point as follows and make judgements by viewing related indicators, querying the board status and alarm information, etc.

l Whether the CDU, RLDU and BTRM module are well installed and the panel

screws are correctly fastened.

Whether the antenna feeder connection is correct.

l Whether the CDU works normally.

Whether the RLDU works normally.

l Whether the configuration selection switch "S/W" on the RLDU panel is set

correctly. For the description of RLDU panel switch, please refer to "Board Indicator and DIP Switch" of "Base Station Maintenance" part in the user manual.

Whether the BTRM works normally.

l Whether the BCPM works normally.

Whether the blind plugs of various modules of the receiving channel are normally connected and there is any loosening.

Whether the physical configuration data of the base station are correct, including the cell parameter, backward search parameters, etc.

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User Manual Airbridge cBTS3612-450 12-carrier CDMA Base Station 1 MS Unable to Access Network

If any problem is found at some step, handle it according to the corresponding chapter or section. For example, a BTRM module fault should be handled as described in "6.5 Transceiver Module (BTRM)".

VI. Abnormal transmission channel

Transmission activation (BTRM), BHPA, CDU and antenna feeder form the transmission channel. But an abnormal transmission channel will lead to no output signal from the base station or abnormal output signals. In this case, you may see at the OMC maintenance console that the logic configuration of a cell has been completed, but the mobile station still cannot gain access to a network. Then, you may check point by point as follows:

Whether the CDU, BHPA module and BTRM module are well installed and the panel screws correctly fastened.

l Whether BTRM transmission activation part works normally.

Whether the CDU works normally.

l Whether BTRM and BHPA are normally connected.

Whether the BHPA works normally.

l Whether BHPA and CDU are connected. l Whether the feeder connection between CDU and the cabinet top is normal.

Whether the feeder connection between the cabinet top and the antenna is normal.

Whether the blind plugs of various modules of the receiving channel are normal and whether there is any loosening.

Whether the antenna is correctly installed.

Whether there is any standing wave ratio alarm.

If any problem is found at some step, handle it according to the corresponding chapter or section. For example, a BTRM module fault should be handled as described in "6.5 Transceiver Module (BTRM)".

VII. The cell gain and common channel gain are not correctly set

You may see at the OMC maintenance console that the logic configuration of a cell has been completed, but the mobile station still cannot gain access to a network. In this case, you may check whether various gain parameters during the cell configuration are correctly set.

When the cell is logically configured, such parameters as the sector gain, carrier gain, pilot channel gain, synchronization channel gain, paging channel gain, etc. must be configured. If these parameters are improperly set (for example, excessively small), the mobile station will not be able to capture the corresponding common channel and this makes the mobile station unable to gain access to a network.

Make sure whether the gain parameters contained in Abis-Cell Setup message are reasonable via the Abis interface message tracing tool. If unreasonable, the data configuration table of BSC must be modified and the gain parameters be configured again.

VIII. The overhead message content is not correct

Upon entering the idle status, the mobile station must receive all overhead messages (including at least the following four: the access parameter message, system parameter message, CDMA channel list message and adjacent area list message.

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User Manual Airbridge cBTS3612-450 12-carrier CDMA Base Station 1 MS Unable to Access Network

Other overhead messages depend on the setting of network parameters) configured in the whole system within the specified period of time. Otherwise, the mobile station cannot gain access to a network.

In addition, the value of the parameters in each overhead message will also make the mobile station unable to gain access to a network and needs confirming carefully.

With the air interface message signaling analyzer, you may check whether the mobile station has received the overhead messages configured in the whole system. In addition, you should check whether the parameter value of each overhead message is correct. If not, you may modify the data configuration table of BSC and update the overhead message again.

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User Manual

Conversation Fault

Airbridge cBTS3612-450 12-carrier CDMA Base Station 2

2 Conversation Fault

For the content in this chapter, please refer to related parts in BSC Maintenance Manual.

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User Manual

Downloading Failure Fault

Airbridge cBTS3612-450 12-carrier CDMA Base Station 3 Software

3 Software Downloading Failure Fault

3.1 Description of Fault

I. FTP client login failure

OMC sends a command to an OMU (a base station operation & maintenance unit running on BCKM) to start downloading files from BAM. The OMU receives the command, but cannot log on to the FTP server of BAM. In this case, OMC background receives the abnormal halt message of OMU and FTP client login fails.

II. Abnormal halt of file loading by the board

When some board software is downloaded and activated by means of OMC, it is found that the whole stage from the starting of downloading and activating to the waiting for the activation report is normal. Then, OMC receives the abnormal halt message of OMU and file loading is abnormally halted by the board.

3.2 Fault Analysis and Location

I. FTP client login failure

Check whether the FTP server on BAM is in Stop status or correctly set.

First view whether the FTP server is in Stop status. If it runs normally, then check whether the FTP server is set correctly. FTP server settings include the following four: user name, user password, user accessible path and access authority. Any setting error will lead to failed login or failed board software loading.

When a base station loads software, the above four items are set as follows:

User name: Password:

Access path: Access authority:

OMU obtains the IP address of a base station by means of BOOTP request. If this process fails, OMU will not be able to obtain the IP address of the base station and naturally cannot log on to the FTP server of BAM. Usually, a disconnected link, wrong route or configuration data error may lead to the failed BOOTP process. These should be eliminated one by one. For details, please refer to "5.1 OML Signaling Fault".

Check whether OMU BOOTP is normal

OMU OMU Required to include the file path specified in the software uploading/downloading command. The directory to be uploaded must be set as readable and writable.

II. Abnormal halt of file loading by the board

All load files must have the file headers in stipulated format, in which the file ID and file version must be consistent with the corresponding field in the activation command sent by OMC. Otherwise, the board will consider the software actually downloaded as inconsistent with that to be loaded and reports abnormality error.

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+ 53 hidden pages