Auto dialer call transfer tie up phone line

If we call out to a consumer and ask questions and they want to speak with someone at one of our locations and we transfer the call, does that one line get tied up for the duration of the call.

This depends. If you are using call transfer service of the phone line, then the call transfer service will free the line. If you are using 3-way calling or conference calling feature of the phone line, then it will tie up the phone line during the conference.

If you are using same line call transfer (simulation), then by definition, it will tie up your phone line.