Section: 5.4.4.2.3 Clearing when tones/announcements are not provided and the network does not indicate that "CCBS activation is possible"
Content: When in-band tones and announcements are not provided, and, the network does not wish to indicate in the Allowed Actions IE that "CCBS is possible", the call control entity of the network shall initiate call clearing by stopping all running call control timers, sending a DISCONNECT message without progress indicator, either without the Allowed Actions IE or with the Allowed Actions IE indicating that "CCBS is not possible", starting timer T305 and entering the "disconnect indication" state. 5.4.4.2.3.1 Receipt of a DISCONNECT message The call control entity of the mobile station in any state except the "null" state, the "disconnect indication" state, and the "release request" state, shall, upon the receipt of a DISCONNECT message either without progress indicator information element or with progress indicator different from #8, and, either without the Allowed Actions IE or with the Allowed Actions IE indicating that "CCBS is not possible": - stop all running call control timers; - send a RELEASE message; - start timer T308; and - enter the "release request" state. 5.4.4.2.3.2 Abnormal cases The call control entity of the network, having entered the "disconnect indication", shall upon expiry of timer T305: send a RELEASE message to the mobile station with the cause number originally contained in the DISCONNECT message; start timer T308; and enter the "release request" state.