I picked up the phone and was asked for my name, as soon as I said there are two people by that name he hung up. I did a redial and the company name is IBEX Global, a call centre for a number of companies. They will allow you to have your phone number added to their do not call list and they say it will take around 72 hours to take effect.
This number has been calling once or twice a day for the past week, including twice today (Saturday); blocked the number on day 2 (after the 3rd call in a day and a half and no message left).
The 2nd interruption today (still the one ring before it disconnects) pissed me off enough to call the number back, which led to a sketchy sounding voice recording claiming to be Ibex Global Solutions and offering the chance to be removed from their calling list.....if I happen to be dumb enough to give them my phone number. Uh no thanks, I don't want to actually GIVE you my number when you're already harassing me.
They also said you could get more information from their website: http://www.ibexglobal.com
All I got from the site was that they're one of those horribly annoying call center megacompanies....and their flashy red and white webpage hurts my eyes.