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SRVCC (Single Radio Voice Call Continuity) provides the ability to transition a voice call from the VoIP/IMS packet domain (LTE) to the legacy circuit domain. Variations of SRVCC are being standardized to support both GSM/UMTS and CDMA 1x circuit domains. For an operator with a legacy cellular network who wishes to deploy IMS/VoIP-based voice services in conjunction with the rollout of an LTE network, SRVCC offers VoIP subscribers with coverage over a much larger area than would typically be available during the rollout of a new network.

Use Srvcc parameter to enable/disable EATF functionality. Signaling - Srvcc is also available for configuring SRVCC functionality.

To View and Edit Srvcc

On SBC main screen, go to All > Address Context > Zone > Srvcc. The Srvcc window is displayed.

Figure : Srvcc

The following fields are displayed:

Table : Srvcc Parameters

Parameter Default ValueDescription


Enable or disable EATF functionality for a zone.

Make the required changes and click Save at the right hand bottom of the panel to save the changes made.

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