Calix competitors include Adtran, Alcatel-Lucent, Allied Telesis, Huawei, Tellabs, ZTE and Zhone Technologies. In 1997, SBC began acquiring other telephone companies, including Pacific Telesis, Ameritech, and SNET. Philip J. Quigley is the retired chief executive officer of Pacific Telesis Corporation. Pacific Telesis Group was headquartered in San Francisco and incorporated in Nevada. He was also a member of Telesis. In 1997, Pacific Telesis Group was acquired by SBC Communications. Social telesis may be further divided into individual telesis and collective telesis. Social dynamics is further divided into social genesis and social telesis. He was a director of Telesis Management Ltd and AAA MIP Limited. Between 2004 and 2005, Switch and Data purchased RACO, Meridian Telesis and LayerOne. Its former direct parent, Pacific Telesis Group, was legally merged into AT&T Teleholdings. In 2012, Premier America Credit Union acquired Telesis Community Credit Union.