Section: 4.5.1.5a MM connection establishment for emergency calls for CS fallback
Content: When the MS is in NO CELL AVAILABLE state, camped on an E-UTRAN cell, and IMSI attached for CS services via EMM combined procedures, as described in 3GPP TS 24.301[ Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 ]  [120], the MM sublayer requests EMM to initiate a service request procedure for mobile originating CS fallback emergency call, irrespective of whether timer T3246 is running. The MM connection establishment is delayed until the mobile station changes to a GERAN or UTRAN cell. After this point, the behaviour specified in subclause 4.5.1.5 applies. When the MS is not IMSI attached for CS services via EMM combined procedures, as described in 3GPP TS 24.301[ Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 ]  [120], and the MS is camping on an E-UTRAN cell, the MS shall perform any cell selection to GERAN or UTRAN (see 3GPP TS 43.022[ None ]  [82] and 3GPP TS 25.304[ None ]  [98]). The MM connection establishment is delayed until the MS changes to a GERAN or UTRAN cell. After this point, the behaviour specified in subclause 4.5.1.5 applies.