The Access Transfer Control Function (ATCF) is a function in the serving (visited if roaming) network. When SRVCC is enhanced with ATCF, the ATCF is included in the session control plane for the duration of the call before and after access transfer. The ATCF may be co-located with one of the existing functional entities within the serving network (that is, P-CSCF or IBCF).
To include ATCF, from the EMA, navigate to All > Profiles > Signaling > Atprofile > Include ATCF_.
The window Include ATCF_ appears.
Include ATCF_
Select an Atprofile from the drop-down menu Atprofile.
Atprofile dropdown
The window Edit Include ATCF_ appears.
Edit Include ATCF_ Window
It has two options for the field Include ATCF - Always and Criteria. Select the button against the appropriate field.
Include ATCF of the frame Edit Include ATCF_
| Option | Description |
|---|---|
Always | When this option is selected, ATCF is included always without any criteria. |
Criteria | When this option is selected, inclusion of ATCF in the registration path can be controlled, based on access type over which registration request is received, along with the UE roaming status. |
Select the field Criteria to choose between disabling/enabling Roaming UE and Non Roaming UE. For details, refer to Include ATCF - Criteria.
Click Save to save the changes made. Click Undo Edits to roll back to the configuration before edits were made and saved the last time.
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