This process requires a paper form.
Thanks to PRis Cantu, Director of Systems Control, for pointing us to instructions on how to make changes. On 2/17/14 she wrote:
"UAccess allows employees and business managers to update phone numbers. Additionally, business managers have the ability to change room numbers.
The Employee Self Service path is: UAccess Employee-->Main Menu-->Self Service-->Personal Information-->Phone numbers
The Manager Self Service path is: UAccess Employee-->Main Menu-->MSS WorkCenter Start Page-->MSS Request Forms-->Personal Info Changes
Paper documents are no longer accepted."