Quote from Kramer in The Stall
Elaine: What is going on? Who is Andre? Jerry: Kramer's Andre. He's fooling around with these 976 numbers. Hey, I told you, I don't want you doing that on my phone! Kramer: Jerry, I'm telling you, this phone-sex thing is hilarious. Like this Erica woman. Here, look. You gotta call her. What a voice she uses. Jerry: You know, it's weird, because that voice sounded familiar to me.