I am also getting these calls very often, no one speaks if you pick up the call.
I called back, automated message says press 2 to include your number into Do Not Call list and press 1 to speak to customer representative. I pressed 2 and cut the phone.
But this is irritating.

This number calls me every day ! If you call the number back it says disconnected.If I could get a hold of this real company name I WOULD SUE THEM FOR HARASSMENT!

Beware of scammers posting to the board and saying the scam is legitimate. Too many negatives to accept one positive. The number 520-277-9097 is a phishing number. Legitimate companies do not share dial-out phone numbers with other companies even when they use a call service or PC service. The legitimate companies pay for dedicated phone numbers to make sure that traffic is directed back to their companies.

I got a call from this # about lowering my credit card interest rate. I pressed 1 to talk to a person. I have a few credit cards so when I asked for specifics on what card they were calling about the man on phone (with an Indian accent) said I'm sorry ma'am and hung up.

This shows on caller ID as "JTN", which is a Just Talk Number commonly used by prison inmates.  GOOGLE the term "JTN" and read it for yourself.  Just don't answer or add to you Blocked Callers List !

This is not a scam...I did get a free wireless security alarm and free installation , just pay monthly for the service.  So for us it was not a scam.  Glad I did.

I got this from the 800notes.com

DO NOT GIVE YOUR NAMES OUT ON THIS BOARD!!!!

This is another security/alarm scam. Pleasant female voice, "free" system, just put sign in your yard.

Don't answer, don't call back, don't press 1,2 3 , or anything!

Phishing for live #'s to sell and get $ just by calling and pulling your caller id.