By sending a SETUP message with a Repeat Indicator set to "support of service change and fallback", a multimedia BC-IE, and a speech BC-IE (see Figure 4.1), a terminal may request a call to be set with the capability to fallback to either a speech only, a multimedia only call or to use service change later during the active state of the call (the first BC IE indicates the preferred service). If the terminal supports Network-initiated service upgrade to multimedia, then it shall also indicate this in the SETUP message with the "Enhanced Network-initiated ICM" (ENICM) Capability (see TS 24.008). After checking the provisioning (see subclause 4.2.1.1), and verifying that the functionality is supported, the MSC replies in the CALL PROCEEDING message with either the two BCs in the same order (to indicate that it accepts the proposed settings - see Figure 4.2), or with a single BC (multimedia or speech - see Figure 4.3) unless the CALL PROCEEDING is delayed until the response from the terminating user and then it may also be sent with the BCs in reverse order (see clause 4.2.3). In the case the MSC ignores the SETUP message if the presence of a reserved value for the Repeat Indicator is set, it sends a STATUS message back to the UE (see Figure 4.4), with the Cause Value set to #100, "Conditional IE error" (see clause 8.7.2 of TS 24.008). The UE then reacts as described in clause 5.5.3.2.2 of TS 24.008, and may resend a new SETUP message with a single BC, or perform any appropriate action according to its implementation. This also applies in case the MSC returns instead a RELEASE COMPLETE message.