Transmission of analog and digital information across a single line

• US 5,495,485 A
• Filed: 02/15/1995
• Issued: 02/27/1996
• Est. Priority Date: 08/31/1993
• Status: Expired due to Term

• Current Assignee: Canon Inc.
• Original Assignee: Canon Inc.
• Inventors: Hughes-Hartogs, Dirk
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): Patel, Ajit
• Application Number:
  US08/388,728
• Time in Patent Office: 377 Days
• Field of Search: 370/60, 370/94.1, 370/94.2, 370/110.1, 370/60.1, 370/62, 370/58.1-58.3, 358/400, 358/401, 358/405, 358/406, 358/434-436, 358/438, 358/439, 358/476, 358/425, 358/404, 358/444, 358/440, 358/471, 358/407, 358/442, 379/93, 379/95, 379/100, 379/199, 379/188, 379/210, 379/211, 379/212, 379/214
• US Class Current: 370/524
• CPC Class Codes: H04Q 11/0471 Terminal access circuits
• CPC Class Codes: H04Q 2213/09 Subscriber related equipment; Analog terminal
• CPC Class Codes: H04Q 2213/093 Personal computer
• CPC Class Codes: H04Q 2213/096 Digital subscriber terminal
• CPC Class Codes: H04Q 2213/179 Facsimile; Fax, e.g. still picture

Abstract

Apparatus for sending and receiving both analog and digital information from a single information transmission medium. The apparatus includes a core processor (200), including a digital signal processor (DSP) (212) or a CPU/DSP, in communication with an integrated services digital network (ISDN) interface (204). The core processor (200) also may be in communication with a personal computer (PC) (202). The invention also is directed to a related method, including a series of modules.

Claims

1. Digital apparatus for sending and receiving analog and digital information to and from a single information transmission medium, said apparatus comprising:

A. an integrated services digital network ISDN interface coupled to the transmission medium, the ISDN interface including at least a first connection and a second independent connection; and

B. coupled to the ISDN interface, a digital signal processor DSP not containing any codecs and comprising;

means for distinguishing, in real time, a first data type associated with the transmission medium at the first connection and a second data type concurrently associated with the transmission medium at the second connection; and

means for coupling;

a) a direct digital representation of voltage associated with one of said data types and

b) one of the connections.

2. The apparatus of claim 1, wherein the first connection represents analog data and the second connection represents digital data.

3. The apparatus of claim 2, wherein G3 facsimile data is received at the first connection and G4 facsimile data is received at the second connection.

4. The apparatus of claim 2, wherein the distinguishing means comprises means for distinguishing between G3 facsimile data received at the first connection and V.32bis communication data received at the first connection.

5. The apparatus of claim 1, wherein the first data type comprises G3 data, and wherein the second data type comprises G4 data.

6. The apparatus of claim 1, wherein the ISDN interface includes a plurality of B-channels, the coupling means comprising terminal interconnection means for selectively transmitting data having a predetermined format along one of the B-channels.

7. The apparatus of claim 1, further comprising a personal computer PC in communication with the ISDN interface.