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 configure SRVCC functionality. Zone - Srvcc is available to enable/disable EATF functionality for a zone.
To View and Edit Srvcc
On SBC main screen, go to All > Global > Signaling > Srvcc. The Srvcc window is displayed.
Srvcc
The following fields are displayed:
Srvcc Parameters
| Parameter | Default Value | Description |
|---|---|---|
Stn Sr | NULL | Request URI for a transfer call sent by MSC on PS to CS call handoff. |
E Stn Sr | NULL | Request URI for a emergency transfer call sent by MSC on PS to CS call handoff. |
Atcf URI | NULL | SIP URI to be used as the ATCF Path and Management URI |
Pstops Sti | NULL | Request URI (0-32 characters) for a PS to PS optimized handover call. The allowed character set is:
For example, |
Call Linger Timer | 8 | Number of seconds to wait for INVITE due to STN_SR before clearing the call. |
Make the required changes and click Save at the right hand bottom of the panel to save the changes made.
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