【单选题】
TCH掉话在Abis口处于()两条信令范围以内。
A、ASSIGNMENT COMMAND至DISC
B、ASSIGNMET COMPLETE至RF CHANNEL RELEASE
C、CONNECT 至 DISC
D、ASSIGNMENT COMPLETE至 DISC
A、ASSIGNMENT COMMAND至DISC
B、ASSIGNMET COMPLETE至RF CHANNEL RELEASE
C、CONNECT 至 DISC
D、ASSIGNMENT COMPLETE至 DISC