troubleshooting alarms.pdf

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Troubleshooting alarmsTroubleshooting alarmsTroubleshooting alarmsTroubleshooting alarms

Flexi Multiradio Base Station alarm examplesFlexi Multiradio Base Station alarm examplesFlexi Multiradio Base Station alarm examplesFlexi Multiradio Base Station alarm examplesFlexi Multiradio BTS GSM/EDGE alarms issued at the BSC or NetAct have a four-digit alarm

number, an alarm name, an optional fault reason, and supplementary information. For information

about the other fields in the figure below, see BSC/TCSM Product Documentation.

In the supplementary information, the 3rd byte indicates the detecting module. RRH is represented

by 84, RF Module by 83, and ESMB/C by 82. The fourth and fifth bytes are the optical address and

antenna ports respectively.

The following is an example of alarm printout for an active alarm on single TRX object as seen at

the BSC. In this example, the detecting unit is 83 (RF Module) and the optical address and antenna

port are 11 and 21, respectively. In this example, the optical address byte can be broken down as

follows:

1 = Unit number 4 MS bits show RP3 link number

1 = Unit number 4 LS bits show position in RP3 link chain

The supplementary information gives the location of the antenna on the HW. In this example, the

antenna port can be broken down as follows:

2 = Sub-unit number 4 MS bits show branch number

1 = Sub-unit number 4 LS bits show carrier number or antenna within the branch

In this case, the antenna port refers to RFM/RRH 1.1 branch 2 antenna 1.

The antenna number refers to the antenna as labeled on the RFM/RRH module.

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If the same alarm affects more than two TRX objects, Flexi Multiradio BTS GSM/EDGE reports the

other TRXs in one BTS alarm message. The alarm could be related to the RF Module, SystemModule or Radio Remote Head. BTS reports the Type of plug in unit in Diagnostic info IE Abis

O&M message (RM, ESMB/C or RRH ). The affected TRX IDs are listed in the supplementary

information field of the alarm printout in case of alarms 7606, 7607, and 7608. The supplementary

Figure 1: Single TRX alarm printout as seen at the BSC




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information in one ESMB/C or RF Module alarm can contain a maximum of 15 TRXs and one RRH

alarm can contain a maximum of 12 TRXs.

The following is an example of alarm printout for an active alarm on TRX-2 and TRX-5 on RF

Module as seen at the BSC.

The text under the alarm name gives the fault reason that has caused the alarm. For example, in

the printout above the fault reason is:

RF module detected VSWR above major limit.

System Module and RRH alarms are shown on BSC in the same way as RF Module alarms.

The following are examples for ESMB/C and RRH alarms:

Figure 2: RF Module alarm printout as seen at the BSC




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Flexi Multiradio BTS GSM/EDGE also runs alarm reclassification as described in section Flexi

Multiradio Base Station alarm reclassification.

Figure 3: Example of System Module (ESMB/C) alarm printout

Figure 4: Example of RRH alarm printout




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In 2G Flexi BTS Site Manager, the fault reason is reported in the DescriptionDescriptionDescriptionDescription column, as shown in

the following figure.

Alarm descriptions can also be viewed with a remote 2G Flexi BTS Site Manager connection.

During troubleshooting, remote BTS Site Manager connection supports all the features available viaa local connection, except the Control Abis interface (enable/disable) commands, initial base station

commissioning and undo commissioning. This minimizes needs for on-site troubleshooting.

Figure 5: Alarm examples, 2G Flexi BTS Site Manager view

Id: 0900d805809073eb 2012 Nokia Siemens NetworksDN0947076


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troubleshooting alarms.pdf