Section: L.1 Mapping of NAS procedure to RRC establishment cause(Iu mode only)
Content: When MM requests the establishment of an RR connection, the RRC establishment cause used by the MS shall be selected according to the CS NAS procedure as specified in table L.1.1. Table L.1.1/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] : Mapping of CS NAS procedure to establishment cause When MM requests the establishment of an RR connection, if the MS is configured for EAB (see the "ExtendedAccessBarring" leaf of the NAS configuration MO in 3GPP TS 24.368[ Non-Access Stratum (NAS) configuration Management Object (MO) ]  [135] or 3GPP TS 31.102[ Characteristics of the Universal Subscriber Identity Module (USIM) application ]  [112]), the MS is not an MS configured to use AC11 – 15 in selected PLMN, the MS is not answering to paging and the RRC Establishment cause is not set to "Emergency call", then the MM shall indicate to the lower layer for the purpose of access control that EAB applies for this request. NOTE 1: void. NOTE 2: EAB override is not supported in the CS domain. When GMM requests the establishment of a PS signalling connection, the RRC establishment cause used by the MS shall be selected according to the PS NAS procedure as specified in Table L.1.2. Table L.1.2/3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ] : Mapping of PS NAS procedure to establishment cause NOTE 3: The RRC establishment cause can be used by the network to prioritise the connection establishment request from the MS at high load situations in the network. When GMM requests the establishment of a PS signalling connection, if the MS is configured for EAB (see the "ExtendedAccessBarring" leaf of the NAS configuration MO as specified in 3GPP TS 24.368[ Non-Access Stratum (NAS) configuration Management Object (MO) ]  [135] or 3GPP TS 31.102[ Characteristics of the Universal Subscriber Identity Module (USIM) application ]  [112]), the GMM shall indicate to the lower layer for the purpose of access control that EAB applies for this request except for the following cases: - the MS is an MS configured to use AC11 – 15 in selected PLMN; - the MS is answering to paging or a "call-pull-initiated" indication is received from the upper layer (see 3GPP TS 24.174[ Support of multi-device and multi-identity in the IP Multimedia Subsystem (IMS); Stage 3 ]  [185]); - the RRC Establishment cause is set to "Emergency call"; - the MS is configured to allow overriding EAB (see the "Override_ExtendedAccessBarring" leaf of the NAS configuration MO as specified in 3GPP TS 24.368[ Non-Access Stratum (NAS) configuration Management Object (MO) ]  [135] or 3GPP TS 31.102[ Characteristics of the Universal Subscriber Identity Module (USIM) application ]  [112]) and receives an indication from the upper layers to override EAB; or - the MS is configured to allow overriding EAB (see the "Override_ExtendedAccessBarring" leaf of the NAS configuration MO as specified in 3GPP TS 24.368[ Non-Access Stratum (NAS) configuration Management Object (MO) ]  [135] or 3GPP TS 31.102[ Characteristics of the Universal Subscriber Identity Module (USIM) application ]  [112]) and already has a PDN connection that was established with EAB override. NOTE 4: void.