Access Transfer Control Function (ATCF) primarily handles:

Interview
1

Q. Access Transfer Control Function (ATCF) primarily handles:

a) Signalling coordination during access transfer
b) Authentication vectors
c) Radio resource allocation
d) Charging mediation

Check 🔎

:arrow_right: Correct answer: Letter a.

The Access Transfer Control Function (ATCF) is responsible for signalling coordination during access transfer, especially in scenarios like SRVCC (Single Radio Voice Call Continuity) where voice calls move between LTE and legacy networks (e.g., 3G, 2G).

Q. Access Transfer Control Function (ATCF) primarily handles:

a) :white_check_mark: “Signalling coordination during access transfer”
→ Correct. ATCF manages signalling for seamless access transfer between network types.

b) :x: “Authentication vectors”
→ Incorrect. Authentication vectors are generated by the HSS.

c) :x: “Radio resource allocation”
→ Incorrect. Radio resource allocation is handled by RAN components (e.g., eNodeB/gNodeB).

d) :x: “Charging mediation”
→ Incorrect. Charging mediation is handled by billing/charging systems, not ATCF.