Best way to use sound from computer to landline answering machine?

I have a sound file that i want to be on my landline phone as an answering machine. Problem is, the phone and the computer are pretty distant from one another. I was wondering, among the slightly obvious answers (aka, holding the phone to the speaker) Is there any way that i could do it to get the BEST quality after i transfer it from comp to landline? Thanks a bunch!

Best way to use sound from computer to landline answering machine?
I have a uniden phone, and with a digital phone you can send the .wave.file directly to the phone!! see if you got a digital phone first...then just google under .wave.file...