Dialogic 05-2239-009 User Manual

70

Dialogic Corporation

As indicated in Figure 21, the user or application at the transferred-to endpoint (party C) may fail 
to respond to the ctIdentify.Invoke request causing the timer 1 to expire at the transferring endpoint 
(party A) resulting in an abandoned transfer attempt. As a result, the 
GCEV_INVOKE_XFER_FAIL termination event is received at transferring endpoint (party A). 
Both the original primary call and the secondary, consultation call are left connected and in the 
GCST_CONNECTED state from the perspective of both A and B (primary) and A and C 
(secondary). 

A

(Transferring)

IP CCLib

B

(Transferred)

App

B

(Transferred)

IP CCLib

C

(Transferred To)

App

C

(Transferred To)

IP CCLib

A

(Transferring)

App

FACILITY(ctIdentify.Invoke)

gc_InvokeXfer

(CRNp, CRNs)

GCEV_REQ_

INIT_XFER(CRNs)

FACILITY(ctAbandonInvoke)

GCEV_

INVOKE_FAIL

(CRNp,

GCRV_TIMEOUT)

Pre condition:  Primary call between A and B is connected.

Secondary (consultation) callbetween A and C is connected (not shown).

KEY:
CRNp - primary call
CRNs - secondary
(consultation) call
CRNt - transferred call

Post condition:  Primary call between A and B remains connected.

Secondary (consultation) call between A and C remains connected.
Transferred call between B and C never initiated.

No response from C

T1 timer expires

GCEV_ACCEPT_

INIT_XFER_FAIL(CRNs)