Section: 8.90 Additional MM context for SRVCC
Content: The additional MM Context for SRVCC information element contains mobile station classmarks, supported codec list that are necessary for the AMF/MME/S4-SGSN to perform SRVCC as defined in 3GPP TS 23.216[ Single Radio Voice Call Continuity (SRVCC); Stage 2 ]  [43]. The coding of Mobile Station Classmarks and Supported Codec List fields include the IE value part as it is specified in 3GPP TS 24.008[ Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 ]  [5]. Figure 8.90-1: Additional MM context for SRVCC For each of the Mobile Station Classmark 2, Mobile Station Classmark 3 and Supported Codec List parameters, if they are not available, then the associated length field shall be set to zero, and the particular parameter field shall not be present.