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| Image processing apparatus for an on-screen-display which displays one image over another image |
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| Portable terminal |
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| Using detail-in-context lenses for accurate digital image cropping and measurement |
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| Telephony security system |
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| System and method for mobile electronic messaging |
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| Graphical animation and sound for Internet Call-Waiting messages |
| OF THE INVENTION FIGS. 1 and 2 depict possible operating environments for an embodiment of the ... |
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| Speech coding selection based on call related information |
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Data/voice/fax compression multiplexer
| Details |
Inventors: Arimilli, Harinarayana; Thanawala, Ashish A.; Kanchan, Vasant Kumar;
Assignee: Multi-Tech Systems, Inc. (Mounds View, MN)
Primary Examiner: Nguyen; Chau
Assistant Examiner:
Attorney, Agent or Firm: Schwegman, Lundberg, Woessner & Kluth, P.A.
A data multiplexing network is described which multiplexes a plurality of asynchronous data channels with an asynchronous data stream representing compressed voice signals and/or facsimile signals onto a single synchronous data packet stream. The single synchronous data packet stream is then transmitted by a high speed statistical multiplexer over a composite link to a second site using a modified high-level synchronous data link control protocol with an overlay of a priority statistical multiplexing algorithm. The asynchronous data channels and the compressed voice channel and/or facsimile signals are demultiplexed and reconstructed for sending to other asynchronous computer terminals and to a standard telephone or facsimile analog port at the second site, respectively. PBX trunk interfaces are also provided to allow PBX's to share the composite link between sites. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following Detailed Description of the Preferred Embodiment, reference is made to the accompanying drawings which form a part hereof and in which is shown by way of illustration specific embodiments in which the invention may be practiced.
These embodiments are described in sufficient detail to enable those skilled in the art to practice and use the invention, and it is to be understood that other embodiments may be utilized and that electrical, logical, and structural changes may be made without departing from the spirit and the scope of the present invention.
The following detailed description is, therefore, not to be taken in a limiting sense and the scope of the present invention is defined by the appended claims.
System Overview FIG.
3 is a block diagram showing a plurality of connection combinations for the preferred embodiment of the present invention which is a communication system in which a data/voicofax multiplexer 300a is configured to take voice information from telephone equipment, facsimile information from facsimile machines and asynchronous data from data terminal equipment (DTE) devices and combine this information and data for transmission over a single composite communications link.
Data/voice/fax multiplexers 300a and 300b (generally referred to as data/voice/fax multiplexer 300) are identically configured for multiplexing and demultiplexing this data and information.
The result of this connection allows telephone, facsimile and data communications between sites "A" and "B" in a method of communication which appears to users at both sites to be simultaneous and transparent.
The present invention shown in FIG.
3 connects a plurality of data terminal equipment (DTE) devices such as computers, terminas, printers, modems, etc.
, through asynchronous channels to the data/voice/fax multiplexer 300 at site "A".
Also, telephone equipment such as telephone desk sets, PBX equipment and facsimile (fax) equipment are also connected to data/voice/fax multiplexer 300
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