(19)

(11)

EP 0 978 192 A1

(12)

(43) Date of publication: 09.02.2000 Bulletin 2000/06 (21) Application number: 98921072.9 (22) Date of filing: 08.05.1998

(51) International Patent Classification (IPC)7: H04M 3/50, H04M 3/36 (86) International application number: PCT/US9809/455 (87) International publication number: WO 9852/341 (19.11.1998 Gazette 1998/46)

(84) Designated Contracting States: DE ES FR GB IT NL PT (30) Priority: 12.05.1997 US 854435 12.05.1997 US 854819 (71) Applicant: TEKNEKRON INFOSWITCH CORPORATION Fort WorthTexas 76155 (US)	(72) Inventors: PATTISON, Jon, A. Flower Mound, TX 75028 (US) VIZARD, Paul, A. Plano, TX 75025 (US) MALONEY, Michael, J. Plano, TX 75075 (US) McCALMONT, David, T. San Jose, CA 95120 (US) (74) Representative: Lawrence, John et al Barker Brettell 138 Hagley RoadEdgbaston Birmingham B16 9PW Birmingham B16 9PW (GB)