Some send a .wav file or possibly something similar.

Also they have a ‘receptionist’ to take your messages

Can provide an 800 number.

And include a fax number as well

August 25, 2007

J. Watson
Ruhlin Corporation
P.O. Box 1990
6931 Ridge Road
Sharon Center, Ohio 44274

Dear J. Watson,

My name is **** and I have four years experience as a receptionist in the front office of a manufacturing plant. Some of my duties included faxing, computer use, answering multi-phone lines, collating literature, and greeting those who walked in. I believe that my past experiences would contribute greatly towards the continued success of Ruhlin Corporation. I have attached my resume to provide an overview of all of my achievements and qualifications.

My professional experience combined with my dedication and enthusiasm, should enable me to make an immediate and valuable impact on your organization. I look forward to meeting with you and learning more about the position, your objectives, and how I can contribute to the success of your corporation. If you need to contact me with and questions or concerns, feel free to do so.

Sincerely,

Name