There are some jobs which should be left to the men to do. Telemarketers are the least fun thing about having a phone. They waste your time, annoy you, and make you think that you’re getting a call from someone interesting, not someone who wants to talk about double glazing.
I really think this guy has the right idea. Answer the phone, and then leave it with the baby while you get on with things that actually need doing. Entertained baby, entertained telemarketer, possibly. Now, we can get back to more important things, like watching football or catching a light nap.