CFSB to 2G KPI Ok, but no calls (CFSB not happening)

4G LTE
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22

But as per this my extended request and release is happening at LTE end.
By counter.

23

CSFB preparation & execution are procedures in LTE.
CSFB complete mean UE success voice in 2G/3G.
So LTE KPI is 100% does not mean CSFB success.
After CSFB execution, UE receive GSM/UMTS frequency, you should trace/check in 2G side.
Does BSC support CSFB, GSM neighbor is good, …?
Huawei BSC has counter TCH allocation due to csfb, please check it.

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25

Please check CSFB Switches in BSC side, it should be enabled for cells.

26

SET GCELLSOFT: IDTYPE=BYID, CELLID=XXXX, SUPPORTCSFB=SUPPORT; => check this parameter on BSC

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27

Check if this counter is pegging. L.CSFB.E2G.
If showing zero it means your configuration is not correct. Do parameters compare in CME for one cell which works vs the other which doesn’t work.

28

This KPI means that Call is going to GSM only but doesn’t mean succ in other side (GSM)

30

Please, check if enable everything

  1. MOD ENODEBALGOSWITCH: HoModeSwitch=BlindHoSwitch-1;
  2. MOD CELLALGOSWITCH: LocalCellId=X, HoAllowedSwitch=GeranCsfbSwitch-1;
  3. MOD CELLHOPARACFG:LOCALCELLID=X,HOMODESWITCH=BlindHoSwitch-1&UtranRedirectSwitch-1&GeranRedirectSwitch-1;
  4. MOD CSFALLBACKPOLICYCFG: CsfbHoPolicyCfg=REDIRECTION-1&CCO_HO-0&PS_HO-0;
  5. MOD CSFALLBACKBLINDHOCFG:CNOPERATORID=1,INTERRATHIGHESTPRI=GERAN,INTERRATSECONDPRI=UTRAN,INTERRATLOWESTPRI=NULL,IDLECSFBHIGHESTPRI=GERAN,IDLECSFBSECONDPRI=UTRAN,IDLECSFBLOWESTPRI=NULL;
  6. ADD GERANEXTERNALCELL:MCC=“XXX”,MNC=“XX”,GERANCELLID=XXXX,LAC=XXXX,RACCFGIND=NOT_CFG,BANDINDICATOR=GSM_dcs1800,GERANARFCN=111,NETWORKCOLOURCODE=1,BASESTATIONCOLOURCODE=1,CELLNAME=“XXXXXX”;
  7. MOD GERANNCELL: LocalCellId=XX, Mcc=“XXX”, Mnc=“XX”, Lac=XXX, GeranCellId=XX,BlindHoPriority=32;
  8. MOD GLOBALPROCSWITCH: ProtocolMsgOptSwitch=IdleCsfbRedirectOptSwitch-1;
  9. SET GCELLSOFT:IDTYPE=BYID,CELLID=XXX,SUPPORTCSFB=SUPPORT;
  10. ADD GERANNFREQGROUPARFCN:LOCALCELLID=1,BCCHGROUPID=0,GERANARFCN=XXX;
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