在TUP电路中，若需要请求发送主叫号码，应发送（）信号。
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What is the final step of the core baselining process?（）
A. Implement threshold monitoring using RMO
B. Implement monitoring using SNMP or RMO
C. Poll and record specific SNMP MIB objects from the device.
D. Verify that SNMP MIB is supported in the relevant core device.
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