Which signals are regarded as call-progress signals as they are sent back to inform the caller about the progress of the call?
A. Address Signals
B. Status Signals
C. Call request Signals
D. Answer Signals
Answer:B
Which signals are regarded as call-progress signals as they are sent back to inform the caller about the progress of the call?
A. Address Signals B. Status Signals C. Call request Signals D. Answer Signals