The UPT number uniquely identifies a UPT user and that is used to place a call to, or to forward a call to, that user.
A user may have multiple UPT numbers (such as a business UPT number for business calls and a private UPT number for private calls). In the case of multiple numbers, each UPT number is considered, from a network vantage point, to identify a distinct UPT user, even if all such numbers identify the same person or entity.
Read more about this topic: Universal Personal Telecommunications
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“... in every State there are more women who can read and write than the whole number of illiterate male voters; more white women who can read and write than all Negro voters; more American women who can read and write than all foreign voters.”
—National Woman Suffrage Association. As quoted in History of Woman Suffrage, vol. 4, ch. 13, by Susan B. Anthony and Ida Husted Harper (1902)