Cell Site Structure and troubleshooting from OSS This procedure covers basic structure and troubleshooting of a site from an OSS perspective in situations where a site does not restore whether partially or completely, for example after a rehome or software upgrade.
BTS Hierarchy: In order to troubleshoot a site from the BSC it is necessary to have a knowledge of the logical hierarchy of the BTS (In the BSC) as compared with its physical elements. Physically the BTS is made up of RUs (Replaceable Units) such as the DXU, TRU, etc. Logically these RUs are known as MOs (Managed Objects). The Main MO of any site, the TG (Transceiver Group) is not associated with any hardware at the BTS but resides in the BSC. It can be thought of as an “Address” of the site within the BSC. Connecting the TG to the Site in the Field is the DIP (Digital Path). It represents the T1 (Abis Interface) link to the BTS. In the BTS itself there are RUs, which are represented by MOs in the BSC. BSC
BTS DXU
TG
RXOCF RXOTF RXOIS
DIP (RBLT) TRU
TRU RXOTRX RXOTX RXORX RXOTS (-0&&-7)
TRU RXOTRX RXOTX RXORX RXOTS (-0&&-7)
RXOTRX RXOTX RXORX RXOTS (-0&&-7)
BTS Hierarchy Managed Objects RXOTG-XX RXOCF-XX RXOTF-XX RXOIS-XX RXOTRX-XX-Y RXOTX-XX-Y RXORX-XX-Y RXOTS-XX-Y-0&&-7
Definition Transceiver Group Control Function Timing Function Interconnect Switch Transceiver Controller Transmitter Receiver Time Slots
Physical representation Entire RBS/DIP (usually) DXU Oscillator within the DXU Switch in the DXU TRU Transmitter within the TRU Receiver within the TRU Time Slots within the TRU
Numbering convention: All MOs in a site share the number of the TG. For example, if a site has TG 46, all of the sub-MOs will have number 46. The MOs related to the TRUs will have additional numbers added to them which refer to the TRU’s assignment within the TG. For example, TRU #0 in RXOTG-46 will have RXOTRX-46-0, RXOTX-46-0, RXORX-46-0, and RXOTS-46-0-0&&-7. The additional designations on the time slots refer to the time slot position within that TRU (i.e. TG 46, TRU 0, TS 0 thru 7). Any object in this list has a superior and a subordinate MO. What this means is that in order to perform certain operations it is necessary to remember the status of subordinate and superior MOs. When loading and deblocking always follow the hierarchy from top to bottom, and when taking out of service always follow the hierarchy from bottom to top.
Troubleshooting example #1 – Sector down When experiencing trouble at a site always get the “Big Picture” of how the site is behaving. Is the whole site down, or only certain sectors? Run the following commands to see at what level the site is experiencing problems: AL (print alarm list) RLC2 RP 3L 2P = LLEC: (print cell resources)
ALLIP This will give an overview of all the alarms that exist on the BSC at the time which may point you in the right direction for your specific site, then with the RLCRP command you will see which sectors have resources and which don’t. In our example, if sector B was down you would probably see alarms in the alarm list related to the TRUs at the site as well as the CF. You would see alarms for Logical Channels Availability, and probably alarms on the CF and the individual TRUs. They would look like this in the alarm printout: What you’re looking at Alarm header: gives the alarm class (A1=critical, take immediate action, A2=less critical, take action during wkg hours, A3=take action within a week, O1 &O2=observation only), switch name (i.e. PLT12C0), alarm number, date and time the alarm occurred. The alarm information is printed underneath. When investigating an alarm look at the date and time stamp to see when it came in. A1/APT "PLT12C0 C000G00" 560 010302 0606 CELL LOGICAL CHANNEL AVAILABILITY SUPERVISION CELL SCTYPE CHTYPE CHRATE SPV PL223B BCCH SDCCH TCH FR 1 A3/APT "PLT12C0 C000G00" 550 010302 RADIO X-CEIVER ADMINISTRATION MANAGED OBJECT FAULT MO RXOCF-46
0603
RSITE PL223
A2/APT "PLT12C0 C000G00" 551 010302 RADIO X-CEIVER ADMINISTRATION MANAGED OBJECT FAULT
ALARM SLOGAN BTS INTERNAL
MO RXOTRX-46-2
0603
RSITE PL223
ALARM SLOGAN OML FAULT
The alarm on the CF, “BTS Internal”, means a fault on the CF which is caused by an RU inside the BTS (TRU, PSU, ECU, etc.) The “OML FAULT” alarm on the TRX means that the TRU has lost communication with the BSC. If the whole site were down due to a T1 failure, you would see the Cell Logical Channels Availability Supervision alarms for all 3 sectors, plus the following alarms on the CF, and the DIP: A2/APT "PLT12C0 C000G00" 551 010302 RADIO X-CEIVER ADMINISTRATION MANAGED OBJECT FAULT MO RXOCF-46
0603
RSITE PL223
A1/APT "PLT12C0 C000G00" 548 010302 DIGITAL PATH FAULT SUPERVISION
0603
DIP 46RBLT
HG
ALARM SLOGAN OML FAULT
DIPEND
FAULT ALL1
SECTION
A2/APT "PLT12C0 C000G00" 549 010302 DIGITAL PATH UNAVAILABLE STATE FAULT DIP UAS 46RBLT -
UASR
UASB
SECTION
DATE 010314
TIME 152955
0603 BLOCKING
DATE 010302
TIME 060301
In this case we have an OML Fault on the CF and the whole site has lost communication with the BSC. Also there are faults on the DIP which indicate the fault code (ALL1) and the state (Unavailable).
RLCRP The RLCRP command gives the resources for a cell, i.e. number of BCCH, SDCCH, CBCH (always 0) and TCH. If the cell is up and carrying traffic the printout will look like this:
BCCH 1
CBCH 0
6830
CHANNEL TCH-7343 TCH-24273 TCH-24272 TCH-7349 TCH-24285 TCH-24284 TCH-7347 TCH-24281 TCH-24280 TCH-7352 TCH-24291 TCH-24290 TCH-7421 TCH-24429 TCH-24428 TCH-7384 TCH-24355 TCH-24354 TCH-7660 TCH-8587 TCH-8586 SDCCH-34067 SDCCH-34066 SDCCH-34065 SDCCH-34064 BCCH-34818
6828 6833 6905 6865 7158 8086
SDCCH 4
CHRATE FR HR HR FR HR HR FR HR HR FR HR HR FR HR HR FR HR HR FR HR HR
NOOFTCH 7- 14 SPV 1,2 1 1 1,2 1 1 1,2 1 1 1,2 1 1 1,2 1 1 1,2 1 1 1,2 1 1
STATE IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE BUSY LOCK LOCK IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE BUSY
ICMBAND 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
CHBAND
END And if the cell is down you will see this:
BCCH 0
CBCH 0
SDCCH 0
NOOFTCH 0
In order to troubleshoot further, the next piece of information we need is the TG number associated with the site: RXT
(Print O TG M number : connected P C to the Cell)
The TG number is given in the alarm printouts also.
Then, start troubleshooting from the TRU level downward by getting the status of the MOs. First, find out what TRUs are defined in the site: RXCD (Print Managed Object Configuration) Among other things, this command will indicate which TRUs are in the site by giving a list of the respective TX, RX, and TS objects. If any are blocked (whether they be manually blocked, out of service, or automatically blocked), they will show “BLOCKED” in the printout as well. For this example though, we are only interested in which TRUs are assigned to the site; in our case the printout shows TRU #0, 2 and 4 are assigned (3 sectors, 1 TRU per sector). Since B sector is down, look at TRU #2 by getting the status of the MOs, following the hierarchy top to bottom, TRX to TS: RXMSP:MO=RXOTRX-46-2&RXOTX-46-2&RXORX-46-2&RXOTS-46-2-0&&-7; This command will give the Status of the MOs. The Status can be any of the following: OPER COM MBL DEF MBL NOOP BLO
(Operational) (Manually Blocked) (Manually Blocked and out of service (Unloaded)) (Not Operational, Automatically Blocked)
In our example, the resulting printout tells you that the TRX is in state NOOP BLO. In most cases you will need to block it down and re-load it. When blocking down a TRU, start at the bottom of the hierarchy and work your way up to the TRX: RXBLI:MO=RXOTS-46-2-0&&-7; RXBLI:MO=RXORX-46-2&RXOTX-46-2; RXBLI:MO=RXOTRX-46-2;
(Block the Time Slots) (Block the RX & TX) (Block the TRX)
Then unload the TRU in the same manner: RXESE:MO=RXOTS-46-2-0&&-7; RXESE:MO=RXORX-46-2&RXOTX-46-2; RXESE:MO=RXOTRX-46-2;
(Unload the Time Slots) (Unload the RX & TX) (Unload the TRX)
Then reload the TRX: RXESI:MO=RXOTRX-46-2;
(Load the TRX)
Just do the TRX at first to verify that you can communicate with it. If the response comes back “LOADING FAILED”, it will most likely have to be reset manually. If the response comes back “COM EXECUTED MO NOT LOADABLE FROM THE BSC” you can continue on. Test the TRX: RXTEI:MO=RXOTRX-46-2;
(Run diagnostic test on TRX)
If there is a fault in the TRU you will get a fault code in the response to the command. At this point the TRU may need to be replaced, depending on the fault. If there is no fault, continue loading the TRU: RXESI:MO=RXOTX-46-2&RXORX-46-2; RXESI:MO=RXOTS-46-20&&-7; RXBLE:MO=RXOTRX-46-2; RXBLE:MO=RXOTX-46-2&RXORX-46-2; RXBLE:MO=RXOTS-46-20&&-7;
(Load the TX & RX) (Load the Time Slots) (Deblock the TRX) (Deblock the TX & RX) (Deblock the Time Slots)
Note the order of loading and deblocking is opposite that blocking and unloading. Always block and unload from the bottom up, load and deblock from the top down. At this point you should be operational. Verify by re-issuing the command: RLCRP:CELL=PL223A&PL223B&PL223C; (print cell resources)
Troubleshooting example #2 – Entire site down When the entire site is down you will have to look at the MOs above the TRU level, and at the Dip (DIgital Path). Since the Dip is the connection to the BSC, get its status first of all. Usually the Dip has the same number as the TG, but sometimes if the site is microwaved or goes through Newbridge, it will be different. To verify use the RXAPP command on the TG: RXAPP:MO=RXOTG-46;
(Print device connection to the TG)
The printout looks like this: RADIO X-CEIVER ADMINISTRATION ABIS PATH STATUS MO RXOTG-46 DEV RBLT24-1104 RBLT24-1105 RBLT24-1106
DCP 1 2 3
RBLT24-1107
4
RBLT24-1108
5
RBLT24-1109
6
RBLT24-1110
7
RBLT24-1111
8
RBLT24-1112 RBLT24-1113 RBLT24-1114 RBLT24-1115 RBLT24-1116 RBLT24-1117 RBLT24-1118 RBLT24-1119 RBLT24-1120 RBLT24-1121
9 10 11 12 13 14 15 16 17 18
APUSAGE UNCONC UNCONC MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX16 MPLEX32 UNDEF UNDEF UNDEF UNDEF UNDEF UNDEF UNDEF UNDEF UNDEF UNCONC
APSTATE TRXC SIGNALLING TRXC SIGNALLING SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA SPEECH/DATA IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE IDLE CF AND TRXC SIGNALLING
TEI 2 0
62
4
END
This will give a list of the RBLT24 devices connected to the TG. This is how the RBLT/TG connection is actually made; on a device level rather than a Dip level. There are 24 devices per Dip, numbered consecutively. Here you can see the device range of 11041121. To find the Dip, take the 1st device and divide by 24, the Dip number is 46, same as the TG. NOTE: The DIP and TG vaues are usually the same, but not always. If there are Microwave hops or Newbridge involved, they may not be the same. To get the status of the Dip, type the following command: DTSTP:DIP=46RBLT;
(Status the DIP)
The Status should be WO. If it is ABL, there is probably a problem with the T1 and a ticket would be issued with Pac Bell. (For a list of fault codes associated with the Dip, see the list at the end.) If the Dip is in state WO, check the devices: STDEP:DEV=RBLT24-1104&&-1121;
(Check devices)
All the devices should be either SEBU (Sealed Busy, used for LAPD connections to the BTS), BUSY (carrying traffic), or IDLE (Working, not carrying traffic). If they are in state MBL you will not be able to load the BTS even if the Dip is working. To deblock the devices type the following command:
(Deblock devices)
BLODE:DEV=RBLT24-1104&&-1121;
Then type the STDEP command again, they should now be IDLE. If this didn’t bring the site back, start looking at MOs: RXMSP:MO=RXOCF-46&RXOTF-46&RXOIS-46;
(Check status of CF, TF & IS)
If all these show OPER then start looking at the TRUs as before. It may be that something got left blocked down, or is not operational. If any of the MOs show NOOP BLO then first try to restore them by a simple Block/Deblock RXBLI/RXESE sequence. If that fails you will have to unload the site up to the CF, but in order to unload the CF you will have to first block and unload all of its subordinate MOs. If not, when trying to unload the CF you will get a response “SUBORDINATE MO NOT IN VALID STATE”. After unloading the CF attempt to reload it. If it comes back “Loading Failed” it may need to be reset manually.
Troubleshooting example #3 – MOs Operational, Sector still down In situations where all the MOs in a sector are operational and the sector is still down, there may be problems in the definition of the MOs. The TRX, TX and RX have to be defined correctly for the TRU to be operational. They have the following properties: TRX TEI value, same as the TRX # DCP1 value, Digital Connection Point 1 DCP2 value, Digital Connection Point 2 CELL, sector designation TX BAND, Operating band, must be GSM1900 ANT, Antenna designation MPWR, Maximum Power CELL, sector designation RX BAND, Operating band, must be GSM1900 RXD, Diversity. AB for normal diversity, A for Antenna A only, B for Antenna B only ANTA, Antenna A ANTB, Antenna B If all the MOs are operational and the TRU is not carrying traffic, there is probably a mismatch in the definitions. For example if a TRU is in B sector but the TX is connected to A sector, the TX will not enable. To print the MO definitions, use the following command: RXMOP:MO=RXOTRX-46-2&RXOTX-46-2&RXORX-46-2; This will print a list of definitions in the order of the command, TRX, TX and RX. Look for Cell or Antenna assignments that are out of place. For example, if the Cell designation wasn’t made on a TX, the printout would look like this: RADIO X-CEIVER ADMINISTRATION MANAGED OBJECT DATA MO RXOTRX-46-2
CELL PL223B
CHGR ALL
SWVERREPL DEFAULT
TEI 2
SIG UNCONC
SWVERACT B0531R0405
MO RXOTX-46-2
CELL ALL
CHGR ALL
BAND GSM1900
MO
RXD
BAND
ANTA
DCP1 134 DCP2 135 136
ANT ALPHAB ANTB
MPWR 45
RXORX-46-2
AB
GSM1900
ALPHAB
BETAB
END
You would need to correct this before the TRU will go operational. To change a parameter on a MO you must first block and unload the MO so that it is in state DEF. Then enter the following command: RXMOC:MO=RXOTX-46-2,CELL=PL223B; Then load and deblock the TX as usual and it should come up OPER and you will show resources after a few seconds.
COMMAND LIST The following is a summary of commands used in these procedures: ALLIP; RXMSP:MO=RXOCF-XX; RXOTF-XX; RXOIS-XX; RXOTRX-XX-X; RXOTX-XX-X; RXORX-XX-X; RXOTS-XX-X-0&-7;
-Print Alarm list -Print status of: Control Function Timing Function Interconnect Switch Transceiver Controller Transmitter Receiver Time Slots
RXMFP:MO=RXOXX; RXELP:MO=RXOXX; RLCRP:CELL=PLXXXA; RXTCP:MOTY=RXOTG,CELL=PLXXXA; RXTCP:MO=RXOTG-XX; RXCDP:MO=RXOTG-XX; RXBLI:MO=RXOXX; RXBLE:MO=RXOXX; RXESI:MO=RXOXX; RXESE:MO=RXOXX; RXTEI:MO=RXOXX; RXAPP:MO=RXOTG-X; DTSTP:DIP=XXRBLT; STDEP:DEV=RBLT24-XX&&-YY; BLODI:DEV=RBLT24-XX&&-YY; BLODE:DEV=RBLT24-XX&&-YY; RXMOP:MO=RXOXXX; RXMOC:MO=RXOXX,(parameter)=(x);
-Print faults on MO -Print Error log of MO -Print Cell Resources -Print TG connected to Cell -Print Cells connected to TG -Print MO configuration -Block an MO -Deblock an MO -Load an MO -Unload an MO -Test an MO -Print RBLT24 devices conn. to TG -Status DIP -Print status of device range -Block devices -Deblock devices -Print MO definition -Change MO definition
The following commands are not covered here but may be useful: DTQUP:DIP=XXRBLT; RXMDP:MO=RXOCF-XX; RXOTRX-XX-Y; RXOTS-XX-YY-Z; RLCFP:CELL=PLXXXA; RLDEP:CELL=PLXXXA; RLSTP:CELL=PLXXXA; RLSTC:CELL=PLXXXA,STATE=HALTED; RLSTC:CELL=PLXXXA,STATE=ACTIVE; RLNRP:CELL=PLXXXA,CELLR=ALL;
-Print DIP hits -Print devices connected to CF “ “ “ TRX “ “ “ TS -Print channel numbers for Cell -Print Cell definition -Print Cell status -To halt a sector -To activate a sector -Print neighbors to the cell
FAULT CODE LIST ^^^^^^ SO CF INTERNAL FAULT MAP CLASS 1A ^^^^^^^^^^ Fault No Fault Type CF-1A 0 CF-1A 1 Reset, Power on CF-1A 2 Reset, Switch CF-1A 3 Reset, Watchdog CF-1A 4 Reset, SW fault CF-1A 5 Reset, RAM fault CF-1A 6 Reset, Internal function change CF-1A 7 XBUS related fault CF-1A 8 Timing unit VCO (Oscillator) fault CF-1A 9 Timing bus related fault CF-1A 10 Indoor temp out of safe range CF-1A 11 CF-1A 12 DC voltage out of range CF-1A 13 CF-1A 14 Local bus related fault CF-1A 15 RBS database corrupted CF-1A 16 RU database corrupted CF-1A 17 HW and IDB inconsistent CF-1A 18 Internal configuration failed CF-1A 19 Indoor temperature above safe range CF-1A 20 Indorr temperature below safe range 47 ^^^^^^ SO CF INTERNAL FAULT MAP CLASS 2A ^^^^^^^^^^^^^^^ Fault No Fault Type CF-2A 0 CF-2A 1 Reset, Power on CF-2A 2 Reset, Switch CF-2A 3 Reset, Watchdog CF-2A 4 Reset, SW Fault CF-2A 5 Reset, RAM Fault CF-2A 6 Reset, Internal function change CF-2A 7 RXDA Amplifier Current Fault CF-2A 8 VSWR Limits Exceeded CF-2A 9 Power Limits Exceeded CF-2A 10 DXU-Opt EEPROM checksum fault CF-2A 11 CF-2A 12 RX Maxgain/Mingain Violated CF-2A 13 Timing Unit VCO Ageing CF-2A 14 CDU Supervision/Communication Lost CF-2A 15 VSWR/Output Power Supervision Lost CF-2A 16 Indoor Temp Out Of Normal Conditional Range CF-2A 17 Indoor Humidity CF-2A 18 DC Voltage Out Of Range CF-2A 19 Power System in Standalone Mode CF-2A 20 CF-2A 21 Internal Power Capacity Reduced CF-2A 22 Battery Backup Capacity Reduced CF-2A 23 Climate Capacity Reduced CF-2A 24 HW Fault CF-2A 25 Loadfile Missing in DXU or ECU CF-2A 26 Climate Sensor Fault CF-2A 27 System Voltage Sensor Fault CF-2A 28 A/D Converter Fault CF-2A 29 Varistor Fault CF-2A 30 Bus Fault CF-2A 31 High Frequency Software Fault
CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A CF-2A
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
Non-Volatile Memory Corrupted RX Diversity Lost Output Voltage Fault Optional Synchronization Source RU Data Base Corrupted Circuit Breaker Tripped Default Values Used RX Cable Disconnected Reset, DXU Link Lost Lost communication to TRU Lost communication to ECU Internal Configuration Failed ESB Distribution Failure DB parameter fault
^^^^^ SO CF EXTERNAL CONDITION MAP CLASS 1 ^^^^^^^^ Fault No Fault Type EXT CF-1B 4 L/R SWI (BTS in local mode) EXT CF-1B 5 L/R TI (Local to remote while link lost) EXT CF-1B 7 Synch Info Lost (Valid for IP transmission) ^^^^^ SO CF EXTERNAL CONDITION MAP CLASS 2 ^^^^^^^^ Fault No Fault Type EXT CF-2B 7 Synch Info Lost (Valid for IP transmission) EXT CF-2B 9 RBS DOOR (RBS cabinet door open) EXT CF-2B 10 MAINS FAIL (External power source fail) EXT CF-2B 11 ALNA/TMA Fault EXT CF-2B 12 ALNA/TMA Degraded EXT CF-2B 13 Auxiliary Equipment Fault ^^^^^^^^ SO CF, REPLACEMENT UNIT MAP ^^^^^^^^^^^^^^^ No. Replacement Unit CF RU 0 DXU CF RU 1 ECU CF RU 2 MICRO RBS or SIR CABINET CF RU 3 Y LINK CF RU 4 CF RU 5 CDU CF RU 6 CF RU 7 PSU CF RU 8 CF RU 9 BDM or BFU CF RU 10 ACCU CF RU 11 Active Cooler CF RU 12 ALNA/TMA A CF RU 13 ALNA/TMA B CF RU 14 BATTERY CF RU 15 FAN CF RU 16 HEATER CF RU 17 HEATER EXCHANGER EXT FAN CF RU 18 HEATER EXCHANGER INT FAN CF RU 19 HUMIDITY SENSOR CF RU 20 TMA CM CF RU 21 TEMPERATURE SENSOR CF RU 22 CDU HLOUT HLIN CABLE CF RU 23 CDU RX IN CABLE CF RU 24 CU or TCU CF RU 25 DU or FDU CF RU 26 FU CF RU 27 FU CU PFWD CABLE or FDU TCU PFWD CABLE CF RU 28 FU CU PREFL CABLE or FDU TCU PREFL CABLE
CF CF CF CF CF CF CF CF CF CF CF CF CF CF CF CF CF CF CF
RU RU RU RU RU RU RU RU RU RU RU RU RU RU RU RU RU RU RU
29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
CAB HLIN CABLE CDU BUS ENVIRONMENT LOCAL BUS POWER COMMUNICATION LOOP RBS DB EOM BUS TIMING BUS FDU CXU RXA CABLE FDU CXU RXB CABLE XBUS ANTENNA PSU DC CABLE CXU DC CABLE FLASH CARD PTU BATTERY TEMP SENSOR FCU
^^^^^ SO TRXC INTERNAL FAULT MAP CLASS 1A ^^^^^^^^^^ Fault No Fault Type TRX-1A 0 TRX-1A 1 Reset, Power on TRX-1A 2 Reset, Switch TRX-1A 3 Reset, Watchdog TRX-1A 4 Reset, SW fault TRX-1A 5 Reset, RAM fault TRX-1A 6 Reset, Internal function change TRX-1A 7 Radio Baseband Loop Test Fault TRX-1A 8 Timing Reception Fault TRX-1A 9 Signal Processing Fault TRX-1A 10 Tora Dannie Communication Fault TRX-1A 11 DSP CPU Communication Fault TRX-1A 12 Terrestrial Traffic Channel Fault TRX-1A 13 RF Loop Test Fault TRX-1A 14 RU Data Base Corrupted TRX-1A 15 XBus Communication Fault TRX-1A 16 Initiation Fault TRX-1A 17 X-Interface Fault TRX-1A 18 DSP Fault TRX-1A 19 Reset, DXU Link Lost TRX-1A 20 HW And IDB Inconsistent TRX-1A 21 Internal Configuration Failed TRX-1A 22 Voltage Supply Fault TRX-1A-47 ^^^^^ SO TRXC INTERNAL FAULT MAP CLASS 1B ^^^^^^^^^^^ Fault No Fault Type TRX-1B 0 CDU Not Usable TRX-1B 1 Indoor Temp Out Of Safe Range TRX-1B 2 TRX-1B 3 DC Voltage Out Of Range TRX-1B 4 Indoor Temp Above Safe Range TRX-1B 5 Indoor Temp Above Safe Range 47 ^^^^^ SO TRXC INTERNAL FAULT MAP CLASS 2A ^^^^^
Fault No TRX-2A 0 TRX-2A 1 TRX-2A 2 TRX-2A 3 TRX-2A 4 TRX-2A 5 TRX-2A 6 TRX-2A 7 TRX-2A 8 TRX-2A 9 TRX-2A 10 TRX-2A 11 TRX-2A 12 TRX-2A 13 TRX-2A 14 TRX-2A 15 TRX-2A 16 TRX-2A 17 TRX-2A 18 TRX-2A 19 TRX-2A 20 TRX-2A 21 TRX-2A 22 TRX-2A 23 TRX-2A 24 TRX-2A 25 TRX-2A 26 TRX-2A 27
Fault Type RX cable disconnected RX EEPROM checksum fault RX Config table checksum fault RX Synthesizer unlocked RX Internal voltage fault Astra Dixie communication fault Astra Tracy communication fault TX EEPROM checksum fault TX Config table checksum fault TX Synthesizer unlocked TX Internal voltage fault TX High temperature TX Output power limits exceeded TX Saturation Voltage supply fault VSWR/Output Power Supervision Lost Non volatile memory corrupted Loadfile Missing in TRU DSP Fault High frequency software fault RX initiation fault TX initiation fault CDU-bus communication fault Default values used TX Max Power Restricted DB parameter fault RX Path Fault
^^^^^^^ SO TRXC EXTERNAL CONDITION MAP CLASS 1 ^^^^^^^^^^^^^ Fault No Fault Type EXT TRX-1B 4 L/R SWI (TRU In Local Mode) EXT TRX-1B 5 L/R TI (Local to Remote while Link Lost) ^^^^^^ NO. TRX RU TRX RU TRX RU TRX RU TRX RU TRX RU TRX RU TRX RU TRX RU TRX RU TRX RU TRX RU TRX RU TRX RU
SO TRXC, REPLACEMENT UNIT MAP ^^^^^^^^^^^^^^^ RU 0 TRU or dTRU 1 2 MICRO RBS or SIR CABINET 3 CXU dTRU RXA CABLE 4 CXU dTRU RXB CABLE 5 CDU CXU RXA CABLE 6 CDU CXU RXB CABLE 7 8 9 10 CDU TO TRU PFWD CABLE 11 CDU TO TRU PREFL CABLE 12 CDU TO TRU RXA CABLE 13 CDU TO TRU RXB CABLE 47
^^^^^^ AO TS EXTERNAL CONDITION MAP CLASS 1 ^^^^^^^^^^ Fault No Fault Type EXT TS-1B 3 TRA/PCU (Remote Transcoder/PCU Com. Lost) ^^^^^^ AO TF INTERNAL FAULT MAP CLASS 1B ^^^^^^^^^^^^^^^ Fault No Fault Type TF-1B 0 Optional synchronization source TF-1B 1 DXU-opt. EEPROM checksum fault
^^^^^^ AO TF EXTERNAL CONDITION MAP CLASS 1 ^^^^^^^^^^^^^ Fault No Fault Type EXT TF-1B 0 EXT SYNCH (No Usable External Reference) EXT TF-1B 1 PCM SYNCH (No Usable PCM-Reference) ^^^^^ AO TF EXTERNAL CONDITION MAP CLASS 2 ^^^^^^^^^ Fault No Fault Type EXT TF-2B 0 EXT SYNCH (No Usable External Reference) EXT TF-2B 1 PCM sync (no usable PCM-reference) ^^^^^ AO TX INTERNAL FAULT MAP CLASS 1A Fault No TX-1A 0
^^^^^^^^^^
Fault Type TX offending
^^^^^ Fault TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B TX-1B
AO TX INTERNAL FAULT MAP CLASS 1B ^^^^^^^^^^^^^^ No Fault Type 0 Not Usable 1 CDU VSWR Limits Exceeded 2 CDU Output Power Limits Exceeded 3 4 TX Antenna VSWR Limits Exceeded 5 6 TX EEPROM checksum fault 7 TX Config table checksum fault 8 TX Synthesizer A/B unlocked 9 TX Synthesizer C unlocked 10 Astra Tracy communication fault 11 TX Internal voltage fault 12 TX High temperature 13 TX Output power limits exceeded 14 TX Saturation 15 16 17 TX Initiation fault 18 HW Fault 19 SW Load/Start Fault 20 Input Power Fault 21 Park Fault 22 VSWR/Output Power Supervision Lost 23 Reset, Power On 24 Reset, Communication Fault 25 CU reset, watchdog 26 CU fine tuning fault 27 TX Max Power Restricted 28 TCU High Temperature TX-1B 47 TX Auxiliary Equipment Fault ^^^^^ AO TX INTERNAL FAULT MAP CLASS 2A ^^^^^ Fault No Fault Type TX-2A 0 TX diversity fault ^^^^^ Fault RX-1B RX-1B RX-1B RX-1B RX-1B RX-1B
AO RX INTERNAL FAULT MAP CLASS 1B ^^^^^^^^^^^^^^^^^^ No Fault Type 0 RXDA Amplifier current fault 1 ALNA/TMA fault 2 3 RX EEPROM checksum fault 4 RX Config table checksum fault 5 RX Synthesizer A/B unlocked
RX-1B RX-1B RX-1B RX-1B RX-1B RX-1B RX-1B RX-1B
6 7 8 9 10 11 12 13 RX-1B 47
RX Synthesizer C unlocked Astra Dixie communication fault RX Internal voltage fault RX cable disconnected RX Initiation fault CDU Output voltage fault TMA CM Output Voltage Fault RX Path Fault RX Auxiliary Equipment Fault
^^^^^^^^^^^^^^^ TERMINOLOGY ^^^^^^^^^^^^^^^^^^^^ Fault No The fault number is equal to the bit position in the fault map reported over the Abis interface. INTERNAL FAULT MAP CLASS 1A Affect MO functionality. Faulty HW is part of the signaling MO. INTERNAL FAULT MAP CLASS 1B Affect MO functionality. Origin of the fault is external to the signaling MO. INTERNAL FAULT MAP CLASS 2A Not affect MO functionality. Faulty HW is part of the signaling MO. EXTERNAL CONDITION MAP CLASS 1 Affect MO functionality. The conditions are TG external. EXTERNAL CONDITION MAP CLASS 2 Not affect MO functionality. The conditions are TG external. REPLACEMENT UNIT MAP (RU MAP) Suspected HW causing the faults in internal fault maps. MO Mangaged Object, the class of all object in the BTS O&M model which BSC can communicate with. SO Service Object, an abstract subclass of MO which handles HW. A SO manages one or more RUs. AO Application Object, an abstract subclass of MO which only handles functionality. RU Replaceable Unit, Smallest unit in a RBS2000 cabinet which can be replaced. ^^^^^ LOGICAL RU ^^^^^ A unit which can be refered to but is not a single pysical unit. There are tree different kinds of logical RUs: 1. BUSSES -XBUS -LOCAL BUS -TIMING BUS -CDU BUS
2.
3.
-POWER COMMUNICATION LOOP ANTENNAS -RX A -RX B -TX A -TX B ENVIRONMENT -TEMPERATURE
^^^^^^ BITMAP 000000000001 000000000002 000000000004 000000000008 000000000010 000000000020 000000000040 000000000080 000000000100 000000000200 000000000400 000000000800 000000001000 000000002000 000000004000 000000008000 000000010000 000000020000 000000040000 000000080000 000000100000 000000200000 000000400000 000000800000 000001000000 000002000000 000004000000 000008000000 000010000000 000020000000 000040000000 000080000000 000100000000 000200000000 000400000000 000800000000 001000000000 002000000000 004000000000 008000000000 010000000000 020000000000 040000000000 080000000000 100000000000 200000000000 400000000000 800000000000
FOR RXELP:MO=; ^^^^^^^^^^^^^^^^^^ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
^^^^^^^^^^^^^^^^ DIGITAL PATH FAULTS ^^^^^^^^^^^^^^^ DIP fault 1 Alarm indication signal AIS DIP fault 2 Loss of frame alignment DIP fault 3 Excessive error rate
DIP DIP DIP DIP DIP DIP DIP
fault fault fault fault fault fault fault
4 5 6 7 8 9 10
Alarm indication from the remote end Alarm indication signal in time slot 16 Loss of multiframe alignment Alarm ind. from remote end signalling equipment Alarm indication signal ALL1 Loss of CRC multiframe alignment Consectutive severely errrored seconds
^^^^^^^^^^^ RADIO X-CEIVER ADMINISTRATION ^^^^^^^^^^^^ MANAGED OBJECT STATUS BTS: Last known state of the MO in the BTS RES= MO is in state RESET STA= STARTED DIS= DISABLED ENA= ENABLED BITMAP for BLO (Blocking origin of automatic blocking) HEX BIT xxx1 0 AP object blocked from own superv. perm. xxx2 1 AT object blocked from own superv. temp. xxx4 2 AS object blocked due to fault suspected xxx8 3 TG object blocked from TG xx10 4 TRXC object blocked from TRXC xx20 5 TGC object blocked from TGC xx40 6 OML object blocked from OML xx80 7 X spare x100 8 LMT obj. blo. due to local maint. activities x200 9 CF object blocked from CF x400 10 LOM object blocked from due to local mode x800 11 LOOP obj. blo. from due to loop test failure BITMAP for BLA (Blocking origin of blocking due to action not completed) HEX BIT xxx1 0 BNU obj. needs reset & uncond. load or reset & load. in progr. xxx2 1 BNR obj. needs reset & load check or reset & load. in progr. xxx4 2 BNL obj. needs reset and load check or loading in progress xxx8 3 BNP obj. needs polling or polling in progress xx10 4 BNT obj. needs testing or testing in progress xx20 5 BNI obj. needs intermittent test or interm. test in progr. xx40 6 BND obj. needs updating of MO data xx80 7 BNS obj. needs to be started x100 8 BNM obj. needs to be manually deblocked (BTS initiated) x200 9 BNO obj. needs loop test or loop loop test in progress BITMAP for LMO (Blocking origin of logical managed object TS) HEX BIT xx20 5 CRN LTS blocked due to creation in progress xx40 6 ENA LTS blocked due to not enabled xx80 7 X x100 8 MO LTS blocked from TS x200 9 LTF LTS blocked from LTF x400 10 RSL RSL blocked from RSL x800 11 DEV LTS blocked from speech/data device 1000 12 X 2000 13 SYNCB LTS blo. due to sync. fault in BTS 4000 14 X 8000 15 CHG blocked due to change BITMAP for LMO (Blocking origin of logical managed object TF) HEX BIT xx20 5 CRN LTF blocked due to creation in progress xx40 6 ENA LTF blocked due to not enabled xx80 7 X
x100
8
MO
LTF blocked from TF
DIGITAL PATH (DIP) FAULT CODE LIST ~~~Numeric vaues~~~ 1 2 3 4 5 6 7 8 9 10
Alarm indication signal, AIS Loss of frame alignment Excessive error rate Remote defect indication (Alarm indication from remote end in some AI2 documents) Alarm indication signal in time slot 16 Loss of multiframe alignment Alarm indication from the remote end signalling equipment Alarm indication signal, ALL1 Loss of incoming signal Consecutive severely errored seconds
~~~Abbreviations~~~ AIS LOF ERATE RDI AISM LOMF REFM ALL1 LOS CSES
Alarm indication signal Loss of frame alignment Excessive error rate Remote defect indication (REFF in some AI2 documents) Alarm indication signal in time slot 16 Loss of multiframe alignment Alarm indication from the remote end signalling equipment Alarm indication signal Loss of incoming signal Consecutive severely errored seconds
Some common Dip faults you will see: 4, RDI Remote Defect Indicator (Yellow Alarm), problem at the remote end, either NIU or CSU 2&8, LOF&ALL1, Loss of Framing, All 1’s alarm, the T1 is down due to a failure in the span 2&9, LOF&LOS, Loss of Framing, Loss of Incoming signal, the circuit is either not patched in the BSC or there’s a T-Berd in the DSX
TRU/TEI
DCP1
DCP2
0 1 2 3 4 5 6 7 8 9 10 11
128 131 134 137 140 143 160 163 166 169 172 175
129&130 132&133 135&136 138&139 141&142 144&145 161&162 164&165 167&168 170&171 173&174 176&177
