In SIP INFO we send the extra digits in "subsequentDigit:" section but in our case digits were missing inside SIP INFO SIP INFO is used to transmitt the dialed digits. As per logs we were able to observe that digit got missing because our state machine was in CC_WAIT_FOR_PLAT_RESP instead of CC_SECOND_DIAL because MSG_STOP_SIGNAL_REQ is triggered but MSG_STOP_SIGNAL_RESP is not receiving hence it's stuck in CC_WAIT_FOR_PLAT_RESP . [2021-12-03 18:22:01:958][WARN]msg: MSG_EVT_DETECTED_IND [2021-12-03 18:22:01:958][DEBUG][pal_msghandler, 3239] pal_fn_voipManagerMsgHandler: MSG_EVT_DETECTED_IND Received FOR TERMINAL:1, item_id=2002 [2021-12-03 18:22:01:958][DEBUG][pal_msghandler, 5117] pal_fn_voipManagerMsgHandler: MG_E_Digit Received:2 [2021-12-03 18:22:01:959][DEBUG][pal_fsm, 19173] CC FSM:CC_WAIT_FOR_PLAT_RESP: Event Pal_en_digitReceived received for CallId:5 on Terminal:1 dNextState=35 [2021-12-03 18:22:01:959][DEBUG][pal_msghandler, 6964] Exit pal_fn_voipMan...