Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2006-11-28
2006-11-28
Pham, Chi (Department: 2616)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S395600, C370S466000, C370S535000
Reexamination Certificate
active
07142549
ABSTRACT:
An interface device for providing a gateway function between lines of a public switched telephone network (PSTN) that carry digital hierarchy signals and an asynchronous transfer mode (ATM) backbone network that carries signals in ATM format, the interface device comprising: a telephony transceiver operative to receive upstream digital hierarchy signals in a plurality of digital hierarchies from the PSTN; a hierarchy converter associated with the telephony transceiver and operative to convert at least some of said upstream digital hierarchy signals in a plurality of digital hierarchies to upstream signals in a single digital hierarchy distributed over a plurality of logical channels; an inverse multiplexing unit operatively associated with the hierarchy converter and operative to inverse-multiplex the upstream signals in the single digital hierarchy distributed over a plurality of logical channels; an ATM framer operatively associated with the inverse multiplexing unit and operative to map at least some of the upstream inverse-multiplexed digital hierarchy signals into ATM cells; and an ATM transceiver operatively associated with the ATM framer and operative to transmit said upstream signals in ATM format to the ATM backbone network.
REFERENCES:
patent: 5568486 (1996-10-01), Huscroft et al.
patent: 5995504 (1999-11-01), Swerdlow
patent: 6005865 (1999-12-01), Lewis et al.
patent: 6597689 (2003-07-01), Chiu et al.
patent: 6631133 (2003-10-01), Christie et al.
patent: 6751224 (2004-06-01), Parruck et al.
patent: 2001/0012288 (2001-08-01), Yu
patent: 2345074 (2000-03-01), None
patent: 2349453 (2000-05-01), None
patent: 198 43 625 (2000-03-01), None
patent: 198 50 641 (2000-05-01), None
patent: 000917394 (1999-05-01), None
patent: WO 98/24228 (1998-06-01), None
patent: WO 00/17945 (2000-03-01), None
patent: WO 00/27163 (2000-05-01), None
Park et al., Implementation of the ATM Adaption Layer for VTOA services, ICICS, Singapore, Sep. 9-12, 1997, IEEE, 0-7803-3676-3/97, pp. 786-789.
Sunaga et al., System Architecture for a Large-Scale Public VTOA Handling Node, NTT Network Service System Laboratories, IEEE, 0-7803-4788-9/98, 1998, pp. 275-280.
Grilo et al., VTOA/VoIP/ISDN Telephone Gateway, INESC, Portugal, IEEE, 0-7803-5428-1/99, 1999, pp. 230-235.
Kevin Woods, “Implementing HDSL2 and IMA-Based VPNs,” http://www.pairgain.com/presentations/pres.home.asp. Apr. 2000, Pairgain Technologies, Inc.
Browdy and Neimark PLLC
ECI Telecom Ltd.
Pham Chi
Phan Tri H.
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