Telephonic communications – Plural exchange network or interconnection
Reexamination Certificate
1998-01-21
2001-05-08
Matar, Ahmad (Department: 2642)
Telephonic communications
Plural exchange network or interconnection
C379S220010, C379S093010
Reexamination Certificate
active
06229886
ABSTRACT:
FIELD OF INVENTION
The present invention generally relates to public switched telephone networks and more particularly to a method and apparatus for providing 56K modem technology support for public switched telephone network subscribers served by universal digital loop carrier systems.
BACKGROUND OF INVENTION
Within the Public Switched Telephone Network (PSTN), some subscribers are served by Digital Loop Carrier (DLC) systems which connect subscribers to a central office (CO) voice switch via efficient high speed digital connections. The path of a telephone call in a universal type DLC system requires that the signal intended for a particular subscriber must pass through one digital to analog (D/A) conversion at the voice switch, one analog to digital (A/D) conversion at the central office terminal (COT) and another D/A conversion at the remote data terminal of the universal type DLC system.
The rapid growth of Internet usage has resulted in the desire for faster data transmission. Modem technology has advanced to provide users with the ability to receive data at a rate of 56 kilo bits per second (56K). An example of such technology being standardized by the International Telecommunications Union as V.PCM type modems. This rate is desirable because of the increased amount of information available via the Internet. However there exists competing technologies attempting to become the industry standard for 56K transmissions. All these competing technologies rely on the return path modem signal traversing one D/A converter and one A/D conversion at a subscriber's receiver. Thus, 56K modem technology is available to most telephone subscribers except those served by Universal type DLC systems. This is due to the additional D/A and A/D conversions between the voice switch and the COT.
U.S. Pat. No. 5,610,910 entitled “Access to Telecommunications Networks In Multi-Service Environment” (“the '910 patent”) describes a system which utilizes a CPE connector and a module to route traffic from customer premise equipment (e.g. a computer, fax machine or telephone) to one or more networks (e.g. PSTN, data, etc.). However, the module disclosed in the '910 patent decodes the received signal and analyzes the contents of the data to identify the network service requested (i.e. which ISP). The request must be reassembled (e.g. address conversion, rerouting, etc.) before re-transmitting it to the desired destination network. These additional steps compromise transmission time and provide unwanted data conversions.
Thus, there is a need to provide Universal DLC subscribers with the capability to use 56K modem service.
SUMMARY OF INVENTION
The invention meets these needs and avoids the above-referenced drawbacks by providing a method for enabling the operation of V.PCM modems connected to Universal type digital loop carrier systems, said method comprising the steps of monitoring telephone calls received from at least one telephone subscriber associated with a Universal type digital loop carrier system; routing at least one of the telephone calls directed to a particular one of a plurality of data networks around a central office terminal and a voice switch associated with a public switched telephone network; and transmitting data communication signals utilizing V.PCM modem technology from the data network to the subscriber associated with the Universal type digital loop carrier system.
In accordance with another embodiment of the present invention, a telecommunications system is provided that comprises a central office switch and a Universal type digital loop carrier network including a central office terminal and a remote terminal. The digital loop carrier network transmits and receives communication signals with a plurality of telephone subscribers associated with the Universal type digital loop carrier network. A routing unit communicates with the central office switch, the digital loop carrier network and a data service provider. The routing unit redirects the communication signals received from the data service provider away from the central office switch and the central office terminal to the remote terminal for transmission to one of the plurality of telephone subscribers.
REFERENCES:
patent: 4565903 (1986-01-01), Riley
patent: 4771425 (1988-09-01), Baran et al.
patent: 4903292 (1990-02-01), Dillon
patent: 4969184 (1990-11-01), Gordon et al.
patent: 5001744 (1991-03-01), Nishino et al.
patent: 5018189 (1991-05-01), Kurosawa et al.
patent: 5347566 (1994-09-01), Law et al.
patent: 5355362 (1994-10-01), Gorshe et al.
patent: 5428608 (1995-06-01), Freeman et al.
patent: 5513251 (1996-04-01), Rochkind et al.
patent: 5550905 (1996-08-01), Silverman
patent: 5583996 (1996-12-01), Tsuchiya
patent: 5592475 (1997-01-01), Gliga et al.
patent: 5598411 (1997-01-01), Matsukawa
patent: 5610910 (1997-03-01), Focsaneanu et al.
patent: 5625677 (1997-04-01), Feiertag et al.
patent: 5638429 (1997-06-01), McIntyre
patent: 5668857 (1997-09-01), McHale
patent: 5692043 (1997-11-01), Gliga et al.
patent: 5953318 (1999-09-01), Nattkemper et al.
patent: 5995618 (1999-11-01), Bradley et al.
patent: 6081555 (2000-06-01), Olafsson
patent: 6115460 (2000-09-01), Crowe et al.
McIntosh Kyle D.
Moody Francis A.
Ciena Corporation
Daisak Daniel N.
Matar Ahmad
Soltz David L.
Tieu Benny Q.
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