A 4/7 kHz audio bandwidth selectable digital phone interface (DPI) chip with on-chip analog functions and modem. - Didier Haspeslagh; Eric Moerman; Zhong Yuan Chang; Johan Haspeslagh (IEEE J. Solid State Circuits, 1994)

Cable Modem architectures adapted to the noise problem in the upstream direction for multiple-access Hybrid Fiber Coax Networks. - Johan Haspeslagh; Geert Goris; Mark Van Bladel; Heidi Steendam; Teresa Marongiu; Marc Moeneclaey; Elke Claus; Jon Vandenbruaene; Luc Martens; Paul Gabriel (Broadband European Networks and Multimedia Services, 1998)