Like most business people, you probably have numerous ways for others to get in touch with you and you want a convenient way for them to know how to reach you without your business card starting to look more like a phone directory. For example, you probably have some combination of the following:
At least four phone numbers including home, office (main and direct), and mobile
An SMS address for text messaging on your mobile phone
Multiple corporate and personal e-mail addresses and aliases
A Fax Number
Contacting you may have become more of a guessing game for your customers, clients, and partners than a simple task. The user now has access to control how people communicate with them, and SIP can help by providing a single address for all your communication devices.