I also received multiple times from 503-977-6714.  Here is who they are probably a scam hiding behind the guise of s survey company. If you want to participate in survey's why not go to a survey company that pays $25 per survey instead of these bums:  They are too dumb to understand "Do Not Call:

"At RDD Field Services, our philosophy is not to treat our customers as clients, but to embrace them as partners. To meet the unique business challenges and needs of each partner, we've created an innovative group of services . . .

Telephone Studies:
Every year, RDD Field Services conducts hundreds of quantitative surveys using a computer-assisted telephone interviewing system. This technology enables us to average more than 15,000 hours of telephone interviewing per month. "