If you are at a business convention or on a business trip and you do not have reliable telephone access then you can have your 800 toll free number forward to your cell phone. And if for some reason your cell phone doesn’t get a signal then you can have your callers leave a message on your voicemail. The toll free number can automatically forward to any phone at any location.
If you have a long commute to work or you travel to different business locations then an 800 call forwarding service is ideal. And if you have a PDA with email capabilities then you can also receive faxes and emails to your phone because they are forwarded via email as PDF attachments.