A voicemail service is similar to an answering machine or the voice
mails on a cell phone, but at the same time it is so much more. A
popular voice mail service feature is a customized greeting. This would
allow you to politely explain to your clients that you are unable to
take their call, but you will return it as soon as possible. Date and
time stamps make it possible to know exactly when a voicemail was left.
Additional features could include pager alerts to notify you of a new
voice mail.