A user reports that when attempting to dial an external call to local number the system does nothing -just silence. You interview the user as follows. You: What happens if you longer after you dial…

A user reports that when attempting to dial an external call to local number the system does nothing -just silence. You interview the user as follows. You: What happens if you longer after you dial your number? User: once I waited for about half a minute, then I heard these tones that supported the something was wrong. You: Did the sound stay on the same pitch or did it change pitches back and forth? User: Back and forth one pitch higher than the other. You: OK, that helps. What did you dial to get an outside line? User: Nine (9) You: Thank you, I appreciate the information, I will get back with you shortly. With reference to the scenario described in the exhibit, which statement most accurately describes the situation?