System for interfacing numerous ISDN data connecting to a data n

Details System for interfacing numerous ISDN data connecting to a data n System for interfacing numerous ISDN data connecting to a data n

Filed on

1996-09-05

Date issued

1999-09-28

Examiner

Pham, Chi H.

Patent Class

Multiplex communications

SubClass

Pathfinding or routing

SubSubClass

Switching a message which includes an address header

Other Related Categories

370463, 370466, 370474, H04L 1266

Type

Patent

Status

active

Patent number

059599960

Description

ABSTRACT:
A system for providing low cost data connections directly to a long distance switch in order to connect a plurality of ISDN-based data connections to a data network such as the Internet. A line card of this invention connects directly to a time slot interchange unit of a digital switch and receives ISDN data and control information, extracts the control information and sets up channels through to the data network, and provides ATM segmentation reassembly and header routing information in both directions. This system also provides policing and traffic shaping control for each ISDN connection and traffic control so that a particular ISDN connection does not overload the resources of the line card. The line card of this invention also provides ATM physical layer processing SONET encapsulation, and SONET optical interfaces to a router on the Internet. In this manner, numerous ISDN connections may be made inexpensively by using fewer ISDN modems and channel banks, and lessen the load on local switching systems.

REFERENCES:
patent: 5375118 (1994-12-01), Rao et al.
patent: 5400335 (1995-03-01), Yamada
patent: 5416772 (1995-05-01), Helton et al.
patent: 5453981 (1995-09-01), Katsube et al.
patent: 5521919 (1996-05-01), Anderson et al.
patent: 5568468 (1996-10-01), Ogasawara et al.
patent: 5600469 (1997-02-01), Yamazaki

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