(19)

(11)

EP 0 745 278 A1

(12)

(43) Date of publication: 04.12.1996 Bulletin 1996/49 (21) Application number: 95942768.0 (22) Date of filing: 20.12.1995

(51) International Patent Classification (IPC):  H01Q 13/ 08( . ) H01Q 1/ 38( . ) H01Q 21/ 06( . ) H01Q 1/ 22( . ) H01Q 1/ 42( . ) (86) International application number: PCT/GB1995/002985 (87) International publication number: WO 1996/019844 (27.06.1996 Gazette 1996/29)

(84) Designated Contracting States: DE ES FR IT NL SE (30) Priority: 20.12.1994 GB 19940025751 (71) Applicant: NORTHERN TELECOM LIMITED Montreal, Quebec H2Y 3Y4 (CA)	(72) Inventor: McKINNON, John, Peter, Bruce Paignton, Devon TQ4 6JE (GB) (74) Representative: Dennis, Mark Charles, et al  Nortel Patents, London Road Harlow, Essex CM17 9NA Harlow, Essex CM17 9NA (GB)