10_ra4112aen08gla0_flexi_multiradio_lte_bts_basic_troubleshooting.pdf

Flexi Multiradio LTE BTS Basic Troubleshooting

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1. Select Alarm in Faults window

2. Click on icon with the question mark

3. New window with alarm details is displayed


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1. Select Alarm in Faults window

2. Click on icon „Show source“

3. Alarm source is identified (see also Source column in the Fault view)


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61029 LOS on unit $U, [ethernet] interface $IF

Meaning

No signal is received on the interface referenced in the alarm text. All other transmission alarms related to this signal are suppressed.

Probable causes for Ethernet interfaces: - a cable is cut or there is no cable connected to the interface - the electrical signal is excessively attenuated - the port at the connected far end node is switched off.

Instructions

1. Check that the cables are connected to the correct connectors.

2. Check that the interface at the far-end interface is switched on.

3. Check whether there are active alarms at the far end. If there are, follow the instructions for handling those alarms.

4. To verify that the hardware of the interface unit works correctly, connect a loop cable and check whether the alarm disappears.


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S1 Application Protocol ; S1AP ; S1-AP

protocol that consists of a set of commands and processes used to manage communication between the evolved node B and the evolved

packet core network (MME)


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Instructions

Perform the steps below in the listed order until the BTS Fault disappears.

1. Check the connection with adjacent BTS based on whether the X2

link is broken respectively.

2. Check if the adjacent BTS is operational. If this fault happens right after a commissioning or a configuration change, verify the IP

address of the adjacent BTS


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Perform the steps below in the listed order until the BTS fault disappears.

1. Check the other active BTS faults and act accordingly.

2. Check the cables between the System Module and RF Module. Note that dirty optical connectors may cause the signal level to drop too low.

3. Depending on the fault source, reset the RF Module and/or System Module by blocking/unblocking it.

4. Replace the alarming module's Small Form Factor Pluggable (SFP).

Check also the SFP in the other end and replace it, if needed.

5. Replace the alarming RF Module.

6. If the System Module is the only alarming source or replacing the

RF Module does not clear the fault situation, replace the alarming System Module.


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BTSOM interface ; BTSOM BTS operation and maintenance interface Definition: interface between a base transceiver station (BTS) and the operation and iOMS

integrated operation mediation system ; iOMS

Definition: in NetAct, an integrated mediation component that provides various mediation interfaces towards managed nodes Note: The integrated operation mediation system supports, for example, applications on FCAPS management functional areas with

concentration and aggregation functions for software distribution and performance management data collection. FCAPS stands for fault, configuration, accounting, performance, and security.


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Effect

In case of Subscriber trace activation, if the failed trace connection

was to be used for sending the Trace Reports, then the BTS considers the trace activation for that subscriber as failed. In case of cell trace and interface trace, if the failed trace connection was to be used for

sending the Trace Reports, then the BTS does not start tracing until the trace connection is established successfully.

Instructions

Check the connection with iOMS/3rd Party tool.


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1. Check the GTP-U path supervision configuration of the eNB.

2. Check the supervised network element for proper operation.

3. Check the communication equipment in between eNB and the

supervised network element.


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Radio Module (60W RRH)/the Filter (all others) has detected a VSWR value exceeding the defined level. The antenna line is mismatched or

damaged.

1. Check the antenna cables, connectors, antenna and possible

antenna line devices.

2. Check the antenna line (TX-cable-antenna) impedance matching.


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BTS Operational state is „On Air“ if at least one of the configured cells

in eNodeB is in Operational state: Enabled.


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Snapshot files are useful for troubleshooting purposes and must be

attached when Resolve case is raised to Tier 3 level. Logs can be fetched locally or remotely with BTS Site Manager. For instructions, see BTS Site Manager Online Help(NOLS).


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10_ra4112aen08gla0_flexi_multiradio_lte_bts_basic_troubleshooting.pdf

Documents

active bts faults

alarm source

end interface

fault source

interface unit

alarm details

alarm text

connected far end node