The dialer software connects to a database with a huge set of phone numbers organized in various ways. The calls are often narrowly targeted - sometimes you are calling to confirm attendance at an event, sometimes you are leaving a scripted message for numbers that are known to always go to voice mail. You don’t do any literal dialing, you press a “next call” button and wait for someone to answer.

Charlestown navy yard, a bit north of downtown. Fish Pier is in South Boston.