Assume that T1 and T2 are two radio terminals registered under the same SC node area (SC enables signaling routing). After T1 calls T2's number through the H.323 protocol, T1 and T2 communicate. Which of the following descriptions of the above call process is wrong?

Assume that T1 and T2 are two radio terminals registered under the same SC node area (SC enables signaling routing). After T1 calls T2’s number through the H.323 protocol, T1 and T2 communicate. Which of the following descriptions of the above call process is wrong?

Assume that T1 and T2 are two radio terminals registered under the same SC node area (SC enables signaling routing). After T1 calls T2’s number through the H.323 protocol, T1 and T2 communicate. Which of the following descriptions of the above call process is wrong?
A . After T1 receives the ACF message replied by SC, T1 will send a TCP link establishment request to SC.
B . After the ICP link between T1 and SC is established, 11 will send a SETUP message to SC.
C . After T1 receives the ACF message replied by SC, SC will send a TCP link establishment request to T1.
D . After SC receives the SETUP message sent by T1, it will reply with a CALL PROCEEDING message to T1, and then SC will send a TCP link establishment request to T2.

Answer: A