Global Patent Index - EP 1159824 A1

EP 1159824 A1 2001-12-05 - DIGITAL TELEPHONY CARRIER CURRENT SYSTEM

Title (en)

DIGITAL TELEPHONY CARRIER CURRENT SYSTEM

Title (de)

STRAUMSYSTEM ALS TRÄGER FÜR DIGITALE TELEFONIE

Title (fr)

SYSTEME A COURANT PORTEUR POUR LA TELEPHONIE NUMERIQUE

Publication

EP 1159824 A1 (EN)

Application

EP 00915834 A

Priority

  • US 0004520 W
  • US 25605799 A

Abstract (en)

[origin: WO0049796A1] A distribution system for the distribution of digital telephony data streams for use in a building or facility which uses, as a communication link, AC power lines (105) is described. This distribution system communicates signals and data without the need for continuous telephone lines. This system provides a base unit (104) connected to a subscriber interface unit (102), which in turn is connected to a public communication network. The base unit (104) further provides an AC power line interface (105) over which communication signals are communicated to extension units (106a, 106b, ..., 106e). The extension units (106a, 106b, ..., 106e) support standard user telecommunication devices, such as telephones, switchboards, facsimile machines, and modems. The preferred embodiment of this invention uses a FSK encoding/de-coding scheme to support the communication of the digital signals and to improve system quality, reducing errors and having higher noise immunity.

IPC 1-7 (main, further and additional classification)

H04M 11/00; H04J 3/16; H04J 13/00; H04M 3/42; H04Q 7/20; H04Q 7/32

IPC 8 full level (invention and additional information)

H04B 3/54 (2006.01)

CPC (invention and additional information)

H04B 3/54 (2013.01); H04B 2203/5437 (2013.01)

Citation (search report)

See references of WO 0049796A1

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

WO 0049796 A1 20000824; AU 3704000 A 20000904; AU 769110 B2 20040115; BR 0008393 A 20020924; CA 2362960 A1 20000824; EP 1159824 A1 20011205; JP 2002537731 A 20021105

INPADOC legal status


2007-03-07 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20060829

2004-05-12 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

- Designated State(s): DE ES FR GB IT

2001-12-05 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010924

2001-12-05 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-12-05 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI