EP 1159824 A1 20011205 - 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
Application
Priority
- US 0004520 W 20000221
- US 25605799 A 19990222
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
H04M 11/00; H04M 3/42; H04Q 7/32; H04Q 7/20; H04J 13/00; H04J 3/16
IPC 8 full level
H04B 3/54 (2006.01)
CPC (source: EP)
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
DOCDB simple family (publication)
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
DOCDB simple family (application)
US 0004520 W 20000221; AU 3704000 A 20000221; BR 0008393 A 20000221; CA 2362960 A 20000221; EP 00915834 A 20000221; JP 2000600421 A 20000221