Network Initiated Inbound Call
Incoming call notification is received as an event. The gc_WaitCall( ) function should be issued once.
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Application
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Libgcs7
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State
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Stack
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Network
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gc_WaitCall( )
-->
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Prepare for handling IAM messages
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NULL
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CRN assigned
GCEV_OFFERED
<--
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OFFERED
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IAM
<--
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IAM
<--
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gc_GetDNIS( )
(optional)
-->
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Return immediately with DNIS
<--
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gc_GetANI( ) (optional)
-->
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Return immediately with ANI
<--
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gc_AcceptCall( )
(optional)
-->
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ACM
-->
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ACM
-->
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ACM
-->
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GCEV_ACCEPT
<--
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ACCEPTED
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gc_AnswerCall( )
-->
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ANM *
-->
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ANM *
-->
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ANM *
-->
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GCEV_ANSWERED
<--
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CONNECTED
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NOTE:
* = Or CON in case no gc_AcceptCall() has been made and circuit is in ITU mode
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