name: SRVCC
full_form: Single Radio Voice Call Continuity
context: moves from the local client to a CS MGW in the CS network, as described in TS 23.216 (SRVCC) [133]. In order to achieve this handover, the MSC server, controlling the CS MGW, sends a SIP INVITE message: - either to the remote client (in case of SRVCC handover without SRVCC enhancement); - or to the ATCF (in case of SRVCC handover with ATCF enhancement), to change the communication end from the MTSI client in terminal to the CS MGW as described in TS 23.237 [134]. If EVS is used between local and remote client before SRVCC and if AMR-WB is used after SRVCC by the local CS UE, an MTSI MGW (e.g. MSC/CS-MGW or ATCF/ATGW) can send the RTCP_APP_EP2I request message, (see clause 10.1.2.10), or a CMR in the RTP payload requesting an EVS AMR-WB IO mode, to the remote client to request that it switches from the EVS Primary mode to the EVS AMR-WB IO mode. The mode-set used in CS shall be included in the RTCP_APP_EP2I request message. Furthermore, the RTCP_APP_EP2I request message also supports
description: Single Radio Voice Call Continuity (SRVCC) is a technology that enables seamless handover of voice calls between different radio access technologies, such as LTE and WCDMA. It allows for the continuity of voice services while the user equipment moves from one network to another.
explanation: The context describes SRVCC's function in facilitating smooth transitions between various radio networks during voice calls, highlighting its technological nature.
section_title: 12.26.2Conformance requirement
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biotag_Description: B-Technology,I-Technology,I-Technology,I-Technology,I-Technology,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Technology,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O