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360 Dialogic
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Global Call IP Technology Guide — November 2007
Dialogic Corporation
Third Party Call Control (3PCC) Operations and Multimedia Support
Figure 71. Alternate Third Party Call Control Establishment (part two)
Application A
Global Call
Library A
(IPCCLIB)
Application B
Global Call
Library B
(IPCCLIB)
IPML
Library B
Global Call
Library C
(IPCCLIB)
IPML
Library A
IPML
Library C
Application C
gc_MakeCall
no SDP
GCEV_DIALING
INVITE
no SDP
200 OK
SDP Offer 2
GCEV_CONNECTED
SDP Offer 2
re-INVITE
SDP Offer 2
GCEV_REQ
_MODIFY_CALL
SDP Offer 2
ipm_ModifyMedia
(TxRx)
RTP
IPMEV_MODIFY
_MEDIA
gc_AcceptModifyCall
SDP Answer 2
200 OK
SDP Answer 2
GCEV_MODIFY
_CALL_ACK
SDP Answer 2
continued in
Alternate Third Party Call Control Establishment (part three)
figure
GCEV_OFFERED
no SDP
ipm_StartMedia
(RCV_ONLY)
IPMEV_START
_MEDIA
gc_SetUserInfo
SDP Offer 2
gc_AnswerCall
SDP Offer 2
GCEV_SIP_200OK
gc_ReqModifyCall
SDP Offer 2
Destination IP
address changed.