Telephone?

[ehmcfarl]

I must be really dumb, but I have looked all over my 3400RL Monty and cannot find where to plug a telephone line in. I have never used it at a CG because I had my cell; but, we are going to have someone stay over in our Monty while it is sitting at our house and I would like for them to have a phone to use. Can someone enlighten me as to where the outside socket that I would plug my home phone line into is so the inside socket works. Thanks a lot.