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Appendix A - Call Control Scenarios
411
Application Device Driver State Firmware Network
Return
<--
cc_MakeCall( )
D-channel line
devices
(dtiB1T24)
-->
CALL_OUTGOING
-->
Setup
-->
CCEV_CONNECTED
<--
CONNECTED Connect
<--
NCAS call connected
cc_SetInfoElem( )
setup user-to-
user information,
D-channel line
devices
(dtiB1T24)
-->
cc_SndMsg( )
send User-to-user
signaling
-->
CALL_UUI
-->
UUI
-->
CCEV_USRINFO
<--
CALL_UUI
<--
UUI
<--
cc_GetCallInfo( )
retrieve user-to-
user information
-->
cc_DropCall( )
-->
CALL_DISCONNECTED
-->
IDLE Release
-->
CCEV_DROPCALL
<--
CALL_CLEARED
<--
cc_ReleaseCall( )
-->
CALL_DEALLOC
-->
Rel_Comp
<--
Driver releases
CRN return
NULL CALL_DEALLOC_A
CK
<--