I am having an issue (no SRVCC, high CDR - Call Drop Ratio) with Inter-PLMN Handover for VoLTE call between two areas of same operator.
A VoLTE session with PLMN A gets dropped and again need to initiate call while latching to PLMN B.
I have same MME and SGW.
I have done PLMN whitelisting parameter configuration at RAN end.
But the issue is still persisting.
Do you have any MOP/case study on what parameter settings needs to be set in CORE?
Thanks in advance.