7.5.1 Functional requirements of inter-connecting MSC

23.0183GPPBasic call handlingRelease 17Technical realizationTS

7.5.1.1 Process TO_MSC

Sheet 1: the procedure CAMEL_TOC_INIT is specific to CAMEL; it is specified in 3GPP TS 23.078 [12]. If the MSC does not support CAMEL, processing continues from the "Pass" exit of the test "Result=?". The procedure call formal parameter "First" or "NotFirst" indicates whether the procedure was called earlier in the same call.

Sheet 1, sheet 4: the procedure CAMEL_TOC_Dialled_Services is specific to CAMEL phase 3 or later; it is specified in 3GPP TS 23.078 [12]. If the MSC does not support CAMEL trunk triggering, processing continues from the "Pass" exit of the test "Result?". The procedure call formal parameter "First" or "NotFirst" indicates whether the procedure was called earlier in the same call.

Sheet 1: the procedure MOBILE_NUMBER_PORTABILITY_IN_OQoD is specific to Mobile Number Portability; it is specified in 3GPP TS 23.066 [10].

Sheet 1, sheet 2, sheet 3: the procedure CAMEL_Store_Destination_Address is specific to CAMEL phase 3 or later; it is specified in 3GPP TS 23.078 [12].

Sheet 1, sheet 4: the procedure CAMEL_OCH_MSC_DISC3 is specific to CAMEL phase 1; it is specified in 3GPP TS 23.078 [12].

Sheet 1, sheet2, sheet 4: the procedure CAMEL_OCH_MSC_DISC4 is specific to CAMEL Phase 2 or later; it is specified in 3GPP TS 23.078 [12].

Sheet 1, sheet 7: the procedure CAMEL_MT_CF_LEG1_MSC is specific to CAMEL phase 4 or later; it is specified in 3GPP TS 23.078 [12].

Sheet 1, sheet 2: The variable "Return_Place" indicates at which detection point the additional digit collection is.

Sheet 1, sheet 2: The "inter-digit timer" is a MSC internal timer to wait for additional dialling from the incoming side. At the expiry of the timer, the MSC/gsmSSF may report digits to the gsmSCF (if the event detection point is armed). This timer is used for the SDL modelling purposes only and it may not present the actual implementations.

Sheet 2: "Number_of_Digits" is the Collected_Info specific reporting criterion. The gsmSCF specifies the criterion. The process CS_gsmSSF sends the parameter to the TO_MSC process.

Sheet 2: "ST digit" is the ISUP value for a digit indicating that the Called Party Number is complete.

Sheet 3: the procedures CAMEL_Start_TNRy and CAMEL_Stop TNRy are specific to CAMEL phase 2 or later; they are specified in 3GPP TS 23.078 [12].

Sheet 3: the procedure CAMEL_CF_MSC_ANSWER is specific to CAMEL; it is specified in 3GPP TS 23.078 [12]. If the MSC does not support CAMEL, processing continues from the "Pass" exit of the test "Result?".

Sheet 3: the procedure UUS_MSC_Clear_UUS is specific to UUS; it is specified in 3GPP TS 23.087 [20].

Sheet 3: the procedure CAMEL_CF_MSC_ALERTING is specific to CAMEL phase 4 or later; it is specifed in 3GPP TS 23.078 [12]. If the GMSC does not support CAMEL phase 4 or later, processing continues from the "Pass" exit of the test "Result?".

Sheet 4: the procedure CAMEL_Stop_TNRy is specific to CAMEL phase 2 or later; it is specified in 3GPP TS 23.078 [12].

Sheet 4: the processing in the branch beginning with the Int_O_Release input will occur only if the MSC supports CAMEL.

Sheet 5: the input signal TNRy expired and all the subsequent processing are specific to CAMEL phase 2 or later, and will occur only if the GMSC supports CAMEL phase 2 or later. The procedure CAMEL_OCH_MSC2 is specified in 3GPP TS 23.078 [12].

Sheet 6: the procedure CAMEL_OCH_MSC_DISC1 is specific to CAMEL; it is specified in 3GPP TS 23.078 [12]. If the MSC does not support CAMEL, processing continues from the "No" exit of the test "Result=CAMEL handling?".

Sheet 6: the procedure CAMEL_OCH_MSC_DISC2 is specific to CAMEL; it is specified in 3GPP TS 23.078 [12]. If the MSC does not support CAMEL, processing continues from the "No" exit of the test "Result=Reconnect?" .

Sheet 6: the processing in the branch beginning with the Int_O_Release input will occur only if the MSC supports CAMEL.

Sheet 6: after the process TO_MSC has sent an IAM to the forwarded-to exchange, it acts as a relay for messages received from the parent process and the forwarded-to exchange.

Sheet 7: the process CAMEL_MT_CF_LEG2_MSC is specific to CAMEL phase 4 or later; it is specified in 3GPP TS 23.078 [12].

Figure 7.5.1a: Process TO_MSC (sheet 1)

Figure 7.5.1b: Process TO_MSC (sheet 2)

Figure 7.5.1c: Process TO_MSC (sheet 3)

Figure 7.5.1d: Process TO_MSC (sheet 4)

Figure 7.5.1e: Process TO_MSC (sheet 5)

Figure 7.5.1f: Process TO_MSC (sheet 6)

Figure 7.5.1g: Process TO_MSC (sheet 7)