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TS 23.018
Basic Call Handling

3GPP‑Page   ETSI‑search   eToC↓   LoFT↓   fToC →   CONTENT →
V19.0.0 (PDF)  2025/09  304 p.
V18.0.0  2024/03  304 p.
V17.0.0  2021/03  304 p.
V16.0.0  2020/06  303 p.
V15.0.0  2018/06  299 p.
V14.0.0  2017/03  303 p.
V13.0.0  2015/12  302 p.
V12.2.0  2013/09  302 p.
V11.4.0  2013/03  300 p.
V10.4.0  2013/03  298 p.
V9.4.0  2011/12  289 p.
V8.5.0  2011/12  286 p.
V7.7.0  2008/09  283 p.
V6.6.0  2006/10  267 p.
V5.10.0  2006/10  265 p.
V4.7.0  2003/04  257 p.
V3.12.0  2003/04  238 p.
GSM Rel-98 v7.5.0  2003/12  192 p.
GSM Rel-97 v6.8.0  2003/12  187 p.
GSM Rel-96 v5.6.0  1998/09  169 p.
Rapporteur:
Mr. Landais, Bruno
Nokia France

essential Table of Contents for  TS 23.018  Word version:  19.0.0

each title links to the equivalent title in the CONTENT
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List of Figures and Tables

Figure 1Architecture for a basic mobile originated call
Figure 2Architecture for a basic mobile terminated call
Figure 4.3.1Architecture for a basic trunk originated call
Figure 3Information flow for a basic mobile originated call
Figure 4Information flow for retrieval of routeing information for a basic mobile terminated call
Figure 4aInformation flow for a mobile terminating roaming retry call after successful Retrieval of Routeing Information
Figure 4bInformation flow for a mobile terminating roaming retry call during Retrieval of Routeing Information
Figure 4cInformation flow for a mobile terminating roaming forwarding call after successful Retrieval of Routeing Information
Figure 4caInformation flow for a mobile terminating roaming forwarding call after successful Retrieval of Routeing Information with MTRF Optimal Routing when the GMSC and the new MSC/VLR are the same node
Figure 4dInformation flow for a mobile terminating roaming forwarding call during Retrieval of Routeing Information
Figure 5Information flow for a basic mobile terminated call
Figure 6Process OCH_MSC
Figure 7aProcedure Process_Access_Request_MSC (sheet 1)
Figure 7bProcedure Process_Access_Request_MSC (sheet 2)
Figure 7cProcedure Process_Access_Request_MSC (sheet 3)
Figure 8aProcedure OG_Call_Setup_MSC (sheet 1)
Figure 8bProcedure OG_Call_Setup _MSC (sheet 2)
Figure 8cProcedure OG_Call_Setup _MSC (sheet 3)
Figure 8dProcedure OG_Call_Setup _MSC (sheet 4)
Figure 8eProcedure OG_Call_Setup _MSC (sheet 5)
Figure 8fProcedure OG_Call_Setup _MSC (sheet 6)
Figure 8gProcedure OG_Call_Setup _MSC (sheet 7)
Figure 8hProcedure OG_Call_Setup _MSC (sheet 8)
Figure 8iProcedure OG_Call_Setup _MSC (sheet 9)
Figure 8jProcedure OG_Call_Setup _MSC (sheet 10)
Figure 8kProcedure OG_Call_Setup _MSC (sheet 11)
Figure 9Procedure Obtain_IMSI_MSC
Figure 10Procedure Authenticate_MSC
Figure 11Procedure Obtain_IMEI_MSC
Figure 12Procedure Check_IMEI_MSC
Figure 13Procedure Establish_Originating_TCH_If_Required
Figure 14Procedure Set_CLI_Presentation_Indicator_MSC
Figure 15Procedure Send_Alerting_If_Required
Figure 16Procedure Set_COLP_Info_MSC
Figure 17Procedure Handle_AoC_MO_MSC
Figure 18Procedure Send_Access_Connect_If_Required
Figure 19Procedure OCH_VLRTCH_Check
Figure 7.1.2.1Process OCH_VLR
Figure 7.1.2.2aProcedure Process_Access_Request_VLR (sheet 1)
Figure 7.1.2.2bProcedure Process_Access_Request_VLR (sheet 2)
Figure 7.1.2.2cProcedure Process_Access_Request_VLR (sheet 3)
Figure 7.1.2.2dProcedure Process_Access_Request_VLR (sheet 4)
Figure 7.1.2.2eProcedure Process_Access_Request_VLR (sheet 5)
Figure 7.1.2.3aProcedure OG_Call_Subscription_Check_VLR (sheet 1)
Figure 7.1.2.3bProcedure OG_Call_Subscription_Check _VLR (sheet 2)
Figure 7.1.2.4Procedure Obtain_Identity_VLR
Figure 7.1.2.5Procedure Obtain_IMSI_VLR
Figure 7.1.2.6aProcedure Authenticate_VLR (sheet 1)
Figure 7.1.2.6bProcedure Authenticate_VLR (sheet 2)
Figure 7.1.2.7aProcedure Obtain_Authentication_Sets_VLR (sheet 1)
Figure 7.1.2.7bProcedure Obtain_Authentication_Sets_VLR (sheet 2)
Figure 7.1.2.8Procedure Start_Tracing_VLR
Figure 7.1.2.9Procedure Check_IMEI_VLR
Figure 7.1.2.10Procedure Obtain_IMEI _VLR
Figure 7.1.2.11Process Fetch_Authentication_Sets_VLR
Figure 7.1.2.12Procedure Check_BAOC
Figure 7.1.2.13Procedure OG_CUG_Check
Figure 7.1.2.14Procedure Get_LI_Subscription_Info_MO_VLR
Figure 7.1.2.15Procedure Get_AoC_Subscription_Info_VLR
Figure 7.1.2.16aProcedure Check_OG_Barring (sheet 1)
Figure 7.1.2.16bProcedure Check_OG_Barring (sheet 2)
Figure 7.1.2.16cProcedure Check_OG_Barring (sheet 3)
Figure 7.1.2.17Process Update_Location_VLR
Table 1Suggested mapping of Send Routeing Info (SRI) negative responses to ISUP release causes
Figure 36aProcess MT_GMSC (sheet 1)
Figure 36bProcess MT_GMSC (sheet 2)
Figure 36cProcess MT_GMSC (sheet 3)
Figure 36dProcess MT_GMSC (sheet 4)
Figure 36eProcess MT_GMSC (sheet 5)
Figure 36fProcess MT_GMSC (sheet 6)
Figure 36gProcess MT_GMSC (sheet 7)
Figure 36hProcess MT_GMSC (sheet 8)
Figure 36iProcess MT_GMSC (sheet 9)
Figure 37aProcedure Obtain_Routeing_Address (sheet 1)
Figure 37bProcedure Obtain_Routeing_Address (sheet 2)
Figure 37cProcedure Obtain_Routeing_Address (sheet 3)
Figure 37dProcedure Obtain_Routeing_Address (sheet 4)
Figure 37eProcedure Obtain_Routeing_Address (sheet 5)
Figure 37fProcedure Obtain_Routeing_Address (sheet 6)
Figure 38Procedure Send_ACM_If_Required
Figure 39Procedure Send_Answer_If_Required
Figure 40Procedure Send_Network_Connect_If_Required
Figure 41Procedure Handle_COLP_Forwarding_Interaction_MSC
Figure 42Procedure Activate_CF_Process
Figure 43aProcess MT_CF_MSC (sheet 1)
Figure 43bProcess MT_CF_MSC (sheet 2)
Figure 43cProcess MT_CF_MSC (sheet 3)
Figure 43dProcess MT_CF_MSC (sheet 4)
Figure 43eProcess MT_CF_MSC (sheet 5)
Figure 43fProcess MT_CF_MSC (sheet 6)
Figure 43bisMacro CUG_Support_Check_GMSC
Figure 44aProcess SRI_HLR (sheet 1)
Figure 44bProcess SRI_HLR (sheet 2)
Figure 44cProcess SRI_HLR (sheet 3)
Figure 44dProcess SRI_HLR (sheet 4)
Figure 44eProcess SRI_HLR (sheet 5)
Figure 44fProcess SRI_HLR (sheet 6)
Figure 44gProcess SRI_HLR (sheet 7)
Figure 45Procedure Check_Parameters
Figure 46Procedure Subscription_Check_HLR
Figure 47Procedure First_Forwarding_HLR
Figure 48Procedure PRN_Error_HLR
Figure 49Procedure Forward _CUG_Check
Figure 51aProcedure Check_IC_Barring (sheet 1)
Figure 51bProcedure Check_IC_Barring (sheet 2)
Figure 52Procedure IC_CUG_Check
Figure 53Procedure Handle_CFU
Figure 54Procedure Handle_CFNRc
Figure 54AProcess Domain_Selection_HLR
Figure 55aProcess PRN_VLR (sheet 1)
Figure 55bProcess PRN_VLR (sheet 2)
Figure 55cProcess PRN_VLR (sheet 3)
Figure 54dProcess PRN_VLR (sheet 4)
Figure 54eProcess PRN_VLR (sheet 5)
Figure 54fProcess PRN_VLR (sheet 6)
Figure 54gProcess PRN_VLR (sheet 7)
Figure 54hProcess PRN_VLR (sheet 8)
Figure 56Process Restore_Subscriber_Data_VLR
Figure 57aProcess PSI_VLR (sheet 1)
Figure 57bProcess PSI_VLR (sheet 2)
Figure 58Procedure Retrieve_Location_Info_VLR
Figure 59aProcedure Active_Info_Retrieval_VLR
Figure 59bProcedure Active_Info_Retrieval_VLR (sheet 2)
Figure 59cProcedure Authorize_MTRF_VLR
Figure 60Process Prepage_MSC
Figure 61Procedure Prepaging_Page_MS_MSC
Figure 62Procedure Prepaging_Search_For_MS_MSC
Figure 63Process OSI_MSC
Figure 64Process AIR_MSC
Figure 65Procedure Active_Info_Retrieval_Page_MSC
Figure 66Procedure Active_Info_Retrieval_Search_MSC
Figure 66bisProcedure Retrieve_IMEI_If_Required
Table 2Suggested mapping of Send Info For Incoming Call (SIFIC) negative responses to ISUP release causes
Figure 67aProcess ICH_MSC (sheet 1)
Figure 67bProcess ICH_MSC (sheet 2)
Figure 67cProcess ICH_MSC (sheet 3)
Figure 67dProcess ICH_MSC (sheet 4)
Figure 67eProcess ICH_MSC (sheet 5)
Figure 67fProcess ICH_MSC (sheet 6)
Figure 67gProcess ICH_MSC (sheet 7)
Figure 67hProcess ICH_MSC (sheet 8)
Figure 67iProcess ICH_MSC (sheet 9)
Figure 67jProcess ICH_MSC (sheet 10)
Figure 67kProcess ICH_MSC (sheet 11)
Figure 67lProcess ICH_MSC (sheet 12)
Figure 67mProcess ICH_MSC (sheet 13)
Figure 67nProcess ICH_MSC (sheet 14)
Figure 67oProcess ICH_MSC (sheet 15)
Figure 67pProcess ICH_MSC (sheet 16)
Figure 67qProcess ICH_MSC (sheet 17)
Figure 67rProcess ICH_MSC (sheet 18)
Figure 68aProcedure Page_MS_MSC (sheet 1)
Figure 68bProcedure Page_MS_MSC (sheet 2)
Figure 68cProcedure Page_MS_MSC (sheet 3)
Figure 68dProcedure Page_MS_MSC (sheet 4)
Figure 69aProcedure Search_For_MS_MSC (sheet 1)
Figure 69bProcedure Search_For_MS_MSC (sheet 2)
Figure 69cProcedure Search_For_MS_MSC (sheet 3)
Figure 69dProcedure Search_For_MS_MSC (sheet 4)
Figure 70aProcedure Complete_Call_In_MSC (sheet 1)
Figure 70bProcedure Complete_Call_In_MSC (sheet 2)
Figure 70cProcedure Complete_Call_In_MSC (sheet 3)
Figure 70dProcedure Complete_Call_In_MSC (sheet 4)
Figure 70eProcedure Complete_Call_In_MSC (sheet 5)
Figure 70fProcedure Complete_Call_In_MSC (sheet 6)
Figure 70gProcedure Complete_Call_In_MSC (sheet 7)
Figure 70hProcedure Complete_Call_In_MSC (sheet 8)
Figure 70iProcedure Complete_Call_In_MSC (sheet 9)
Figure 70jProcedure Complete_Call_In_MSC (sheet 10)
Figure 70kProcedure Complete_Call_In_MSC (sheet 11)
Figure 71Procedure Set_CLIP_Info_MSC
Figure 73Procedure Establish_Terminating_TCH_If_Required
Figure 74Procedure Handle_AoC_MT_MSC
Figure 75Procedure Set_COL_Presentation_Indicator MSC
Figure 76aProcess ICH_VLR (sheet 1)
Figure 76bProcess ICH_VLR (sheet 2)
Figure 76cProcess ICH_VLR (sheet 3)
Figure 76dProcess ICH_VLR (sheet 4)
Figure 76eProcess ICH_VLR (sheet 5)
Figure 76fProcess ICH_VLR (sheet 6)
Figure 76gProcess ICH_VLR (sheet 7)
Figure 76hProcess ICH_VLR (sheet 8)
Figure 78Procedure Search_For_MS_VLR
Figure 79Procedure Get_CW_Subscription_Info_VLR
Figure 80Procedure Get_LI_Subscription_Info_MT_VLR
Figure 81Procedure Handle_CFB
Figure 82Procedure Handle_CFNRy
Figure 83aProcess Subs_FSM (sheet 1)
Figure 83bProcess Subs_FSM (sheet 2)
Figure 83cProcess Subs_FSM (sheet 3)
Figure 83dProcess Subs_FSM (sheet 4)
Figure 83eProcess Subs_FSM (sheet 5)
Figure 83fProcess Subs_FSM (sheet 6)
Figure 83gProcess Subs_FSM (sheet 7)
Figure 83hProcess Subs_FSM (sheet 8)
Figure 83iProcess Subs_FSM (sheet 9)
Figure 83jProcess Subs_FSM (sheet 10)
Figure 83kProcess Subs_FSM (sheet 11)
Figure 84lProcess Subs_FSM (sheet 12)
Figure 84mProcess Subs_FSM (sheet 13)
Figure 84nProcess Subs_FSM (sheet 14)
Figure 84oProcess Subs_FSM (sheet 14)
Figure 84pProcess Subs_FSM (sheet 14)
Figure 84qProcess Subs_FSM (sheet 14)
Figure 84rProcess Subs_FSM (sheet 14)
Figure 85Macro Check_Ongoing_Calls
Figure 86Macro Update_Non_Speech_Calls_Status
Figure 87Macro Increment_Call_Counter
Figure 88Macro Decrement_Call_Counter
Figure 7.5.1aProcess TO_MSC (sheet 1)
Figure 7.5.1bProcess TO_MSC (sheet 2)
Figure 7.5.1cProcess TO_MSC (sheet 3)
Figure 7.5.1dProcess TO_MSC (sheet 4)
Figure 7.5.1eProcess TO_MSC (sheet 5)
Figure 7.5.1fProcess TO_MSC (sheet 6)
Figure 7.5.1gProcess TO_MSC (sheet 7)
Figure 84aProcess MSC_Coord (sheet 1)

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