The media counterpart of ATCF is abbreviated as:

Interview
1

Q. The media counterpart of ATCF is abbreviated as:

a) MGCF
b) ATGW
c) BSC
d) CTFC

Check 🔎

:arrow_right: Correct answer: Letter b.

The Access Transfer Gateway (ATGW) is the media plane counterpart to the Access Transfer Control Function (ATCF). Together, they enable SRVCC (Single Radio Voice Call Continuity) and other access transfer procedures in IMS networks.

  • ATCF handles the control signaling during access transfer.
  • ATGW handles the media anchoring, maintaining the RTP stream continuity during handover from LTE to legacy networks like 3G or 2G.

Q. The media counterpart of ATCF is abbreviated as:

a) :x: MGCF
→ Incorrect. Media Gateway Control Function is not related to ATCF or SRVCC access transfer scenarios.

b) :white_check_mark: ATGW
→ Correct. ATGW (Access Transfer Gateway) is the media component that works with the ATCF during handovers. ATGW anchors RTP and redirects it toward CS media.

c) :x: BSC
→ Incorrect. Base Station Controller is used in GSM/EDGE networks and unrelated to IMS-based access transfer.

d) :x: CTFC
→ Incorrect. Not a valid standard function in IMS/SRVCC architecture.