"What is business-to-business (B2B) telemarketing?" The answer might seem obvious: annoying call center agents randomly calling people with their sales pitches. We've all received those calls where the caller robotically recites a script, hardly breathing so you can't say a word. But that's not a good way for businesses to gain new customers, let alone build good will in the market. So, the better question is: What is effective B2B telemarketing?