So You are a Cheap Bastard
If you dont feel like going out and buying a business 2 line phone than this section is alright. this is a brief list of Materials you would use.
1) A speaker phone
2) A microphone
3) Speakers
Ok so set ur speaker up by your computer speakers (do this if u want sound effects) after u have done that place the microphone by the speaker so it can recieve the other side talking. when you have done that open up sound record after that is done hit speaker phone dial the number and when it starts to ring hit record and let the good times role!