Assume that T1 and T2 are two radio terminals registered under the same SC node area (SC does not enable signaling routing). After T1 calls T2’s number through the H.323 protocol, T1 and T2 communicate. Regarding the following description of TCP link establishment during the Q.931 signaling interaction between T1, T2, and SC during the above call, which option is correct?

Assume that T1 and T2 are two radio terminals registered under the same SC node area (SC does not enable signaling routing). After T1 calls T2’s number through the H.323 protocol, T1 and T2 communicate. Regarding the following description of TCP link establishment during the Q.931 signaling interaction between T1, T2, and SC during the above call, which option is correct?
A . When there is a TCP link between T1 and SC, SC actively sends a TCP link establishment request to T1.
B . When there is a TCP link between T2 and SC, T2 actively sends a TCP link establishment request to SC.
C . When there is a TCP link between T1 and SC, T1 actively sends a TCP link establishment request to SC.
D . When there is a TCP link between T2 and T1, SC actively sends a TCP link establishment request to T2.

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Answer: C