This seems to be a robotic call that simply determines if you are willing to answer the phone so that the caller can sell your number to telemarketers. The phone rings only 2 or 3 times and then hang up, or if you answer there is no 'call' there.
Labor Day, no rest for the robocaller. New number this time. Reported to FCC 480-280-8848 and before that 623-930-0356
which is Desert Valley Air...selling furnace/air conditioner tune-ups...only to find you need a new one?
Caller ID only gave the number. I let it ring twice, then picked up and hung up. I later called the number - it belongs to the Republican National Committee., and thus is political and exempt from the Do Not Call list.