Network termination unit

Details Network termination unit Network termination unit

1995-01-26

1997-04-29

Zele, Krista M.

Telephonic communications

Subscriber line or transmission line interface

379 88, 379 93, 370385, H04M 300, H04J 312

Patent

active

056256850

ABSTRACT:
A network termination unit to connect a plurality of analog terminals and digital terminals to a U interface of an ISDN telecommunications network. An echo compensator is connected to the U interface to suppress an echo signal produced by the attachment of the terminal device to the U interface. A first bus connects the echo compensator to a communication controller, an a/b interface component block that is compatible with an a/b interface to which an analog terminal is connected, and an S interface component block to which a digital terminal is connected. A processor system, connected to communication controller and a/b interface component block, programs the echo compensator and the S interface component block. B channels of the ISDN telecommunications network are activated and deactivated in response to commands issued by the communication controller. The processor system further evaluates and prepares D channel signalling data for the a/b interface component block.

REFERENCES:
patent: 5305312 (1994-04-01), Fornek et al.
patent: 5305315 (1994-04-01), Lee
"ISDN Das Dienstintegrierende Digitale Nachrichtennetzwerk" [ISDN--The Intergrated Services Digital Communications Network] by P. Bocker, published by Springer Verlag in Berlin, 1990, p. 29.
Kommunikation Mit ISDN [Communications Using the ISDN] by Dr. H. E. Martin, published by Markt and Technik Verlag, Munich, 1988.
Bauteile--Technologie im System ALBIS-ECS 10 000 [Component Technology in the ALBIS-ECS 10 000 System] by Samuel Hammerli, pp. 25-29, and figures 2 and 3.
ISDN--Die Technik [ISDN--The Technology] by A. Kanbach and A. Korper, published by Huther Verlag Heidelberg, 1990, pp. 73-75, 104-109, 206-266, 271.
Digitale Kommunikationsnetze by G. Gerke, published by Springer Verlag in Heidelberg, 1991.
Kommunikationsendgerate by F. Ohmann, published by Springer Verlag in Heidelberg, 1983, pp. 176, 177 and 205-207.

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