# Patent

## Title
Portable interconnection system for incompatible audio communication networks

## Abstract

A portable interconnection system has a housing having and a plurality of communications ports adapted for connection to a plurality of audio communication networks; electronics substantially enclosed by the housing; the electronics including at least interconnection electronics operative to selectively establish a plurality of independent connection sets, each connection set interconnecting at least a plurality of the communications ports for communications between a plurality of audio communication units operating in at least two different and incompatible ones of the audio communication networks; a user interface connected to the interconnection electronics and operative to control the interconnection electronics; wherein a combined weight of the housing and the electronics is not more than fifteen pounds. A display may show an interconnection status of the plurality of audio communication units for a plurality of the independent connection sets simultaneously.

## Background
BACKGROUND OF THE INVENTION
The present invention is directed generally to interconnection systems for otherwise incompatible audio communication networks, and more particularly to a portable interconnection system for such audio communication networks convenient for use by for police, fire, and other emergency services.
Within a given geographic area, it is common for the various police, sheriff, fire, and other emergency services to each have independent audio communication networks. Within such audio communication networks, the various personnel typically have portable audio communications devices, such as two-way radios, that handle the communication of audio signals with one or more dispatch centers. Thus, the various personnel within one particular emergency service are able to talk with others in their emergence service over their dedicated audio communication network. However, these audio communication networks are typically not able to communicate with the audio communication networks of the other emergency services. For example, the city police may be able to have talk directly with other city police, but cannot talk directly with the county constables, the city fire department, or the local hazardous material response team. Of course, the various emergency services can, if necessary, resort to using the public switched telephone network to call and talk with each other, but such an arrangement leads to obvious time delays and increases the likelihood of miscommunications. Thus, the ability of the combined emergency services to coordinate a response to various emergencies, particularly large scale emergencies, is hindered by the lack of easy audio communications.
In view of the above, some interconnect products for audio communication networks have been introduced with an eye toward emergency services. In particular, JPS Communications, Inc. of Raleigh, N.C. offers an interconnection product sold under the brand name ACU-1000. The ACU-1000 interconnection product allows two or more audio communication networks to be interconnected so that personnel in one audio communication network may talk with personnel in the other audio communication network. While such a product has greatly increased the ability of emergency services personnel to talk during emergencies, by allowing for interconnection of their otherwise independent and incompatible audio communication networks, there is a certain level of advance work and planning that must be completed before the benefits can be realized. For instance, for the ACU-1000 product, each of the relevant audio communication networks must be linked to the ACU-1000 hub, which resides in a relatively large computer rack at a fixed location. As such, the ability of the ACU-1000 product to adapt to some types of changing needs, or to be set-up for interconnection with a new audio communication network (e.g., belonging to a new emergency service), is somewhat limited by its size. For example, if a large-scale emergency occurs near the boundary of a jurisdiction, multiple emergency services of each type (e.g., police, fire, etc.) may need to respond to the same event. Absent significant planning effort and advance work, it is likely that some of the emergency services at the emergency site may be interconnected for audio communications using the ACU-1000, but others will unable to do so. Such a situation is less than ideal. Further, the ACU-1000 requires a separate personal computer with a CRT display to be attached to its controller in order to see and understand the various audio signal interconnections established by the ACU-1000. The size of the ACU-1000 components and their associated rack, the need to run cables to a fixed location, and the requirement of a separate personal computer to determine the interconnection status, render the ACU-1000 difficult, time consuming, and complex to move. As such, the ACU-1000 is considered a “fixed” solution, not a mobile or transportable solution.
Thus, while various types of interconnection systems for otherwise independent and incompatible audio communication networks have been proposed, there remains a need for alternative approaches.
SUMMARY OF THE INVENTION
The present invention is directed to a portable interconnection system, which in one embodiment comprises a housing having an integral externally accessible user interface and a plurality of communications ports adapted for connection to a plurality of audio communication networks; electronics substantially enclosed by the housing; the electronics including at least interconnection electronics operative to selectively establish a plurality of independent connection sets, each connection set interconnecting at least a plurality of the communications ports for communications between a plurality of audio communication units operating in at least two different and incompatible ones of the audio communication networks; the user interface connected to the interconnection electronics and operative to control the interconnection electronics; wherein a combined weight of the housing and the electronics is not more than fifteen pounds. The housing may further comprise a display operative to show at least one interconnection status of the plurality of audio communication units, and preferably an interconnection status of the plurality of audio communication units for a plurality of the independent connection sets simultaneously. The display may display the interconnection status in an array format. The portable interconnection system may further comprise a carrying handle connected to the housing and operative to supply the entirety of the vertical support necessary for a user to carry the housing. The electronics may further comprise a power supply having a battery charger. At least a portion of the interconnection electronics may be contained in a plurality of interface cards removably supported by the housing. The interconnection electronics may be further operative to be responsive to commands supplied via DTMF tones to alter at least one of the connection sets and/or to digitally enhance audio communication signals supplied to the interconnection electronics via the connection ports. The combined weight of the housing and the electronics may be less than fifteen pounds, such as not more than ten pounds, and the housing may have a volume of 750 cubic inches or less, advantageously 600 cubic inches or less.
In another embodiment, a portable interconnection system is disclosed that comprises a housing having an integral externally accessible user interface and at least four communications ports adapted for connection to a plurality of audio communication networks; electronics substantially enclosed by the housing; the electronics including at least interconnection electronics operative to selectively establish a plurality of independent connection sets, each connection set interconnecting at least a plurality of the communications ports for communications between a plurality of audio communication units operating in at least two different and incompatible ones of the audio communication networks; wherein at least a portion of the interconnection electronics are contained in a plurality of interface cards removably supported by the housing; the user interface connected to the interconnection electronics and operative to control the interconnection electronics; the electronics further comprises a power supply having a battery charger; the housing further comprising a display operative to show an interconnection status of the plurality of audio communication units for a plurality of the independent connection sets simultaneously; and wherein a combined weight of the housing and the electronics is not more than ten pounds and wherein the housing has a volume of 600 cubic inches or less. Further, such a portable interconnection system may have a carrying handle connected to the housing and operative to supply the entirety of the vertical support necessary for a user to carry the housing. The interconnection electronics may be further operative to be responsive to commands supplied via DTMF tones to alter at least one of the connection sets and/or to digitally enhance audio communication signals supplied to the interconnection electronics via the connection ports.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a schematic representation of a portable interconnection system in accordance with one embodiment of the present invention.
FIG. 2 shows a front view of the portable interconnection system of FIG. 1.
FIG. 3 shows a top view of the portable interconnection system of FIG. 1.
FIG. 4 shows the display of the portable interconnection system of FIG. 1 indicating a first interconnection status in any array format.
FIG. 5 shows the display of FIG. 4 indicating a second interconnection status.



DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION
The present invention provides a portable interconnection system for audio communication networks that can be taken to a field location and easily set up to allow interconnection between the various otherwise independent and incompatible audio communication networks present. While the following discussion may be in the context of audio communication networks for emergency services due to the particular applicability of the present invention to the needs of emergency services, the present invention is not so limited and may be used to interconnect a wide variety of audio communication networks.
The portable interconnection system 10 is illustrated in FIG. 1 and generally indicated at 10. The portable interconnection system 10 includes electronics 60 in a housing 20, and it is intended that the combined housing 20 and electronics 60 be small and light enough to be carried by a single individual to desired field location.
The electronics 60 include a power supply 68 and interconnect electronics 62. The power supply 68 may include a battery charger 69, power conditioning circuits, fuses, and the like, so that the power supply 68 may operate on conventional external power and optionally recharge batteries. The power supply 68 supplies power to the rest of the electronics 60 in a conventional fashion. The interconnect electronics 62 include a backplane 64, a controller circuit 70, extension circuits 72, an optional local extension circuit 74, and an optional landline or PSTN circuit 76. The controller circuit 70, extension circuits 72, local extension circuit 74, and landline circuit 76 may advantageously be designed to be in the form of removable modules 66 that insert into one of the module slots 22 provided on the housing 20 (described further below). These modules 66 mate with the backplane 64 in a conventional fashion, and the backplane 64 provides a convenient means for exchanging audio and control signals between the modules 66. The controller circuit 70 oversees the overall operation of the portable interconnection system 10, and may include a conventional microprocessor, PAL, ASIC, or the like programmed with suitable controller software. The extension circuits 72 interface the communications devices to the portable interconnection system 10 so that the various communications devices can communicate with each other. The extension circuits 72 advantageously include a digital signal processor operating under appropriate software so as to provide Voice Operated Transmit (VOX), Voice Modulation Recognition (VMR), audio delay, digital noise reduction, tone keying functions. Most of the extension circuits 72 are designed and optimized for operation with various radio communication devices, such as High Frequency (HF) devices, Narrow Band FM (NBFM), Land Mobile Radios (LMR), and satellite units. However, an optional form of extension circuit, referred to as a PSTN extension circuit 76, may be configured to connect to the conventional landline phone system of the Public Switched Telephone Network (PSTN). In addition, the optional local extension circuit 74 allows the portable interconnection system 10 to function as communication unit itself, using the speaker/microphone 48 of the user interface 40, discussed further below. Further, a voice circuit 78 may be included that co-operates with the user interface 40 to allow the local user-operator to be prompted to enter commands, receive voice instructions, and otherwise control the local speaker 48.
The actual interconnection of two or more extension circuits 72 to form a communications set operates as follows: Whenever a communications set is to be set up, controller circuit 70 is given the number (address) of the extension 72 requesting the interconnection and the address(es) of the extension(s) 72 to be made part of the communications set. The controller circuit 70 then assigns a set of audio buses on backplane 64 to the extensions 72 that are part of the communications set. The audio buses assigned are for the exclusive use of that communications set and allow audio signals to flow between all extension circuits 72 that are part of that communications set. When the communications set is no longer needed and dissolved by the controller circuit 70, the audio connections between the extensions 72 that were formerly a part of the communications set are switched off and the audio buses are returned to an unassigned state. In addition to audio signals, when a communications set is set up, certain control signals also flow among the extensions 72 that are part of the communications set. The controller circuit 72 manages these control signals as well as the audio buses.
For further details of the controller circuit 70, extension circuits 72, local extension circuit 74, and landline circuit 76, and voice circuit 78, attention is directed to JPS document 5030-200200, revision 1.0, entitled “ACU-T Tactical Interconnect System,” included in the attached Appendix and considered a part of this disclosure. Further, it should be noted that the controller circuit 70, extension circuits 72, local extension circuit 74, landline circuit 76, and voice circuit 78 may be generally configured and operated like the analogous circuits in the prior art ACU-1000 fixed interconnection system. Likewise, the controller software and extension software may also be generally as in the prior art ACU-1000 fixed interconnection system 10. Attention is directed to the ACU-1000 technical manual, found at www.jps.com/downloads/support/ACUMan2-21.pdf, which is incorporated herein by reference, for additional details.
The housing 20 substantially encloses, and optionally completely encloses, the power 68 supply and interconnect electronics 62. The housing 20 includes a rugged shell 20s, a user interface 40, and a plurality of communications ports 30. The shell 20s is preferably metallic and advantageously includes a drip-proof top with suitable indicators (power on, battery charge, etc.). The elements of the user interface 40 may be located on the top of the shell 20s, the communication ports 30 on one side, power connections at the rear, and a plurality of module slots 22 at the front. The module slots 22 of the shell 20s allow access to the backplane 64 and provide a convenient means of adding and/or removing the modules 66. The communications ports 30 connect the relevant communications devices to the extension circuits 72, etc. via the backplane 64. The communications ports 30 may take any suitable form known in the art, but are advantageously uniform and of a circular quick disconnect type, such as that known as CPC connectors available from AMP, Inc. of Harrisburg, Pa. Advantageously, there are at least four communications port 30, such as shown in the Figures. The user interface 40 shown in FIG. 1 includes a keypad 44, a speaker/microphone 48, a volume control 46, and a display 42. The user interface 40 allows the user to control the interconnect electronics 62, such as making appropriate settings, establishing interconnection sets, etc., with the relevant control commands typically entered via the keypad 44. The speaker/microphone 48 allows the portable interconnection system 10 to function as a local audio communications unit and may also allow for audio assistance in the entry of commands. Alternatively, a handset 24 may be connected to the portable interconnection system 10 via a suitable connector on the voice circuit module 78 to serve this function. The volume control 46 controls the volume of the audio output by the speaker 48, and the speaker 48 may be disabled by an on-off switch (not labeled). The display 42 functions to display the interconnection status of the various audio communications units connected to the portable interconnection system 10, as discussed further below.
The primary purpose of the portable interconnection system 10 is to allow the various audio communications units to communicate with each other when using different and otherwise incompatible audio communication networks. Thus, the portable interconnection system 10 allows audio communications between a plurality of audio communication units operating in at least two different and incompatible audio communication networks. To do so, the portable interconnection system 10 creates an connection between selected ones of the audio communications units, referred to herein as a connection set, that allows for audio signals and audio control signals (such as transmit initialization authorization) to be communicated between the plurality of audio communication units within the communication set. Thus, the connection set is a group of a plurality of communications units that are in audio communication with each other via the portable interconnection system 10, with at least two of the communication units operating in different and otherwise incompatible communication networks. While the portable interconnection system 10 may create a single connection set, the portable interconnection system 10 is preferably capable of creating a plurality of independent connection sets. For example audio communication units from the independent communication networks of fire group A, fire group B, and police C may be interconnected by the portable interconnection system 10 in connection set Alpha, while the audio communication units from the independent communication networks of fire group B, police D, and federal response team E may be simultaneously interconnected by the portable interconnection system 10 in connection set Beta. In order to facilitate the creation and control of the connection sets, the display 42 is advantageously adapted to display the connection status of the various connection sets simultaneously. While a complex CRT-like display may serve this function, a simpler embodiment of the display 42 formed by a matrix of LED's is also possible. For example, assuming that fire group A is connected to communication port one, fire group B connected to communication port two, police C connected to communications port three, police D connected to communications port four, and federal response team E is connected to communications port five, the display 42 may show the interconnection status as shown in the array form of FIG. 4, where connection set Alpha corresponds to net one and connection set Beta corresponds to net two. Further, assuming the portable interconnection system 10 is also functioning as a local audio communications unit, designated as HSP and participating in connection set Alpha but not connection set Beta, the interconnection status may be displayed on display 42 as shown in FIG. 5. By supplying the portable interconnection system 10 user-operator with a ready indication of interconnection and connection set status, the display 42 greatly enhances the ability of the portable interconnection system 10 operator to set up and operate the portable interconnection system 10 in stressful or rapidly-changing environments.
One prime function of the portable interconnection system 10 of the present invention is to be portable. As mentioned above, commercially available units, such as the ACU-1000, allow similar interconnection capability, but at a fixed location. The portable interconnection system 10 of the present invention is intended to be taken to a variety of field locations; thus, mobility is an important concern. As such, the portable interconnection system 10 is made to be relatively small and lightweight. According to preferred embodiments of the present invention, the portable interconnection system 10 occupies a volume of 750 cubic inches or less, and preferably 600 cubic inches or less. In addition, the portable interconnection system 10 of preferred embodiments of the present invention has a weight, including all electronics 60 when all slots 22 are full, of fifteen pounds or less, more preferably about ten pounds or less, and more preferably of about eight pounds or less. Accordingly, the portable interconnection system 10 may advantageously include a carrying handle 50 connected to the housing 20 that, when supporting the entire weight of the housing 20 (with electronics 60 included), carries a weight of fifteen pounds or less, more preferably about ten pounds or less, and more preferably of about eight pounds or less. With such an arrangement, a single human can easily carry the portable interconnection system 10 of the present invention to a field location using the carrying handle 50, and still have a hand free for carrying other items, such as emergency supplies.
In general, the discussion above has assumed that the portable interconnection system 10 is controlled through the user interface 40. However, it should be noted that the portable interconnection system 10 may, in some embodiments, also be controlled remotely. For example, the portable interconnection system 10 may be programmed to accept remotely generated commands to set-up, alter, or otherwise modify one or more of the interconnection sets. Such remote commands may be issued via an audio communication unit in communication with the portable interconnection system 10, such as through the use of DTMF tones or the like. As such, the portable interconnection system 10 advantageously includes a suitable DTMF detector, such as in extension circuit 72, local extension circuit 74, or voice circuit 78.
As used herein, the phrase “showing the interconnection status of a plurality of audio communication units” and like phrases means showing, at a minimum, which audio communication units are communicatively connected to which other audio communication units through the portable interconnection system 10, which is necessarily more than merely showing which audio communications unit may be connected to the portable interconnection system 10.
The present invention may, of course, be carried out in other specific ways than those herein set forth without departing from the essential characteristics of the invention. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

## Claims

1. A portable interconnection system, comprising:
a housing having an integral externally accessible user interface and a plurality of communications ports adapted for connection to a plurality of audio communication networks;
electronics substantially enclosed by said housing; said electronics including at least interconnection electronics operative to selectively establish a plurality of independent connection sets, each connection set interconnecting at least a plurality of said communications ports for communications between a plurality of audio communication units operating in at least two different and incompatible ones of said audio communication networks;
said user interface connected to said interconnection electronics and operative to control said interconnection electronics;
wherein a combined weight of said housing and said electronics is not more than fifteen pounds.

2. The portable interconnection system of claim 1 wherein said housing further comprises a display operative to show at least one interconnection status of said plurality of audio communication units.

3. The portable interconnection system of claim 2 wherein said display is operative to show an interconnection status of said plurality of audio communication units for a plurality of said independent connection sets simultaneously.

4. The portable interconnection system of claim 3 wherein said display displays said interconnection status in an array format.

5. The portable interconnection system of claim 1 further comprising a carrying handle connected to said housing and operative to supply the entirety of the vertical support necessary for a user to carry said housing.

6. The portable interconnection system of claim 1 wherein said electronics further comprises a power supply having a battery charger.

7. The portable interconnection system of claim 1 wherein at least a portion of said interconnection electronics are contained in a plurality of interface cards removably supported by said housing.

8. The portable interconnection system of claim 1 wherein said interconnection electronics are further operative to be responsive to commands supplied via DTMF tones to alter at least one of said connection sets.

9. The portable interconnection system of claim 1 wherein said interconnection electronics are further operative to digitally enhance audio communication signals supplied to said interconnection electronics via said connection ports.

10. The portable interconnection system of claim 1 wherein said combined weight of said housing and said electronics is not more than ten pounds.

11. The portable interconnection system of claim 1 wherein said housing has a volume of 750 cubic inches or less.

12. The portable interconnection system of claim 1 wherein said plurality of communication ports comprise at least four of said communication ports and wherein said housing has a volume of 600 cubic inches or less.

13. A portable interconnection system, comprising:
a housing having an integral externally accessible user interface and at least four communications ports adapted for connection to a plurality of audio communication networks;
electronics substantially enclosed by said housing; said electronics including at least a power supply and interconnection electronics operative to selectively establish a plurality of independent connection sets, each connection set interconnecting at least a plurality of said communications ports for communications between a plurality of audio communication units operating in at least two different and incompatible ones of said audio communication networks; wherein at least a portion of said interconnection electronics are contained in a plurality of interface cards removably supported by said housing;
said user interface connected to said interconnection electronics and operative to control said interconnection electronics;
said housing further comprising a display operative to show an interconnection status of said plurality of audio communication units for a plurality of said independent connection sets simultaneously; and
wherein a combined weight of said housing and said electronics is not more than ten pounds and wherein said housing has a volume of 600 cubic inches or less.

14. The portable interconnection system of claim 13 further comprising a carrying handle connected to said housing and operative to supply the entirety of the vertical support necessary for a user to carry said housing.

15. The portable interconnection system of claim 13 wherein said interconnection electronics are further operative to be responsive to commands supplied via DTMF tones to alter at least one of said connection sets.

16. The portable interconnection system of claim 13 wherein said interconnection electronics are further operative to digitally enhance audio communication signals supplied to said interconnection electronics via said connection ports.

17. A portable interconnection system, comprising:
a housing having an integral externally accessible user interface and at least first, second, and third communications ports;
a first audio communication unit connecting to said housing at said first communications port and operating in a first audio communications network;
a second audio communication unit connecting to said housing at said second communications port and operating in a second audio communications network; said second audio communications network different from, and incompatible with, said first audio communication network;
a third audio communication unit connecting to said housing at said third communications port and operating in a third audio communications network; said third audio communications network different from, and incompatible with, both said first and second audio communication networks;
electronics substantially enclosed by said housing; said electronics including at least interconnection electronics operative to selectively establish a plurality of independent connection sets including a first connection set and a second connection set;
said first connection set comprising said first and second audio communication units, and excluding said third audio communication unit, said interconnection electronics operative to enable audio communications between audio communication units in said first connection set via said interconnection electronics;
said second connection set comprising said first and third audio communication units, and excluding said second audio communication unit, said interconnection electronics operative to enable audio communications between audio communication units in said second connection set via said interconnection electronics;
said user interface connected to said interconnection electronics and operative to control said interconnection electronics;
wherein a combined weight of said housing and said electronics is not more than fifteen pounds;
wherein said housing has a volume of 750 cubic inches or less.