A.3 Connect operation

29.0783GPPCAMEL Application Part (CAP) specificationCustomised Applications for Mobile network Enhanced Logic (CAMEL) Phase XRelease 17TS

On receipt of a Connect operation from the gsmSCF the called party number used for routeing is derived from the destinationRoutingAddress (see Table A.3). If the triggering of the CAMEL service was made for a mobile terminating call in the GMSC or VMSC or for a mobile forwarded call, then an ISUP ACM shall be sent to the preceding exchange. The encoding of the backward call indicators in the ISUP ACM is specified in 3GPP TS 09.12 [1].

On receipt of a Connect operation from the gsmSCF for a trunk originating call, the called party number used for routeing is derived from the destinationRoutingAddress (see Table A.3) and an ISUP ACM is sent to the preceding exchange (in an overlap signalling scenario this will prevent any further SAMs being sent by the preceding exchange).

Table A.3 illustrates the mapping of parameters received in the Connect operation to parameters sent in the ISUP IAM to the succeeding exchange. Parameters which were received in the ISUP IAM and are not replaced by parameters of the Connect operation are treated according to the normal procedures.

On sending of the ISUP IAM the awaiting address complete timer is started. If the timer expires, then the call is released in both directions and an appropriate indication is returned to the calling subscriber.

Table A.3

CAP Operation Connect (Note 1)	ISUP message IAM
DestinationRoutingAddress	Called party number
OriginalCalledPartyID	Original called number
callingPartysCategory	Calling party’s category
redirectingPartyID	Redirecting number
redirectionInformation	Redirection information
GenericNumbers	Generic number (Note 2)
ServiceInteractionIndicatorTwo	See Table A.4
Cug-Interlock	Closed user group interlock code
cug-OutgoingAccess	Optional forward call indicators (Note 3)

NOTE 1: Optional parameters may be absent, i.e. they are mapped only if received.

NOTE 2: The set of generic numbers received in the genericNumbers parameter is mapped to the appropriate number of Generic Number parameters in the ISUP IAM. This shall be performed irrespective of the value of the screening indicator in the ISUP calling party number.

NOTE 3: The cug-OutgoingAccess is mapped to the Closed User Group indicator which is carried in bits A & B of the Optional forward call indicators.

Table A.4 – Mapping of the CAP Connect and ContinueWithArgument operation serviceInteractionIndicatorsTwo to ISUP.

Table A.4

CAP	ISUP parameter in
ServiceInteractionIndicators	ACM/CPG/CON/ANM/REL	IAM
	—	Call diversion treatment indicators parameter
Call to be diverted indicator		Call to be diverted indicator
– call diversion allowed – call diversion not allowed		– no indication – call diversion allowed – call diversion not allowed
	—	Conference treatment indicators parameter
Conference at DLE accept. ind.		Conference acceptance ind.
– accept conference request – reject conference request		– no indication – accept conference request – reject conference request
Calling party restriction indicator – no IN impact – presentation restricted	—	Calling party number address presentation restricted indicator – no impact – presentation restricted
	ACM/CPG/CON/ANM: Conference treatment indicators parameter	—
Conference at OLE accept. ind.	Conference acceptance ind.
– accept conference request – reject conference request	– no indication – accept conference request – reject conference request
	REL, busy cause	—
Call completion treatment indicator	Diagnostig field
– accept CCBS service request – reject CCBS service request	– CCBS possible – CCBS not possible
Connected number treatment indicator	Note 3
– no IN impact – presentation restricted – present called IN number – present called IN number restricted

NOTE 3:

If "no IN impact" was received for Connected number treatment indicator in the serviceInteractionIndicatorsTwo, then a connected number parameter and a generic number parameter "additional connected number" are passed on unchanged.

If "presentation restricted" was received for Connected number treatment indicator in the serviceInteractionIndicatorsTwo, then:

a) If a connected number parameter has been received in the ISUP ANM or ISUP CON, then the address presentation restricted indicator is set to "presentation restricted".

b) If a generic number parameter "additional connected number" has been received in the ISUP ANM or ISUP CON, then the address presentation restricted indicator is set to "presentation restricted".

c) If a redirection number parameter has been received, then a redirection number restriction parameter is sent in the ISUP ANM with bits AB set to "presentation restricted".

If "present called IN number" was received for Connected number treatment indicator in the serviceInteractionIndicatorsTwo, then:

a) If a connected number parameter has been received in the ISUP ANM or ISUP CON, then the connected number parameter is modified as follows:

nature of address indicator and numbering plan indicator are encoded as received in the called party number of the ISUP IAM,

address presentation restricted indicator: 00 (presentation allowed),

address signals: as received in the called party number and possible subsequent number parameters, until the ISUP ACM was sent.

b) A generic number parameter "additional connected number" is deleted from the message, if applicable,

c) A redirection number parameter is deleted from the relevant messages, if applicable.

If "present called IN number restricted" was received for Connected number treatment indicator in the serviceInteractionIndicatorsTwo, then:

a) If a connected number parameter has been received in the ISUP ANM or ISUP CON, then the connected number parameter is modified as follows:

nature of address indicator and numbering plan indicator are encoded as received in the called party number of the ISUP IAM,

address presentation restricted indicator: 01 (presentation restricted),

address signals: as received in the called party number and possible subsequent number parameters, until the ISUP ACM was sent.

b) A generic number parameter "additional connected number" is deleted from the message, if applicable,

c) A redirection number parameter is deleted from the relevant messages, if applicable.