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
<--