FIELD OF THE INVENTION
The present invention generally relates to fixed mobile convergence with a common embedded control card to switch voice, data and video calls. More particularly, the present invention relates to a device for fixed and mobile telephony convergence with a common embedded control card to switch voice, data and video calls from one protocol to another protocol and over one media to another media.
BACKGROUND OF The INVENTION
A cordless telephone system generally includes a portable cordless handset and a cordless base station which is connected to a service-provider's phone system by a landline. The cordless base station has a assigned landline telephone number which allows the user to place and receive calls utilizing the cordless portable handset within a limited range of the cordless portable base station, such as within a home or office. However, due to range limitation of cordless telephone systems, a cordless portable handset is enabled to provide the user with only relatively local radio-telephone communication.
Radio-telephone communication outside the range of a cordless telephone system however, can be provided to the user via a cellular telephone system. A cellular telephone system typically includes cellular subscriber units which may be one of mobile, portable and cellular base stations which are connected to a service via one or more cellular switching networks. Each cellular subscriber has an assigned cellular telephone number which allows the user to place and receive calls within a widespread range of the cellular base stations, such as

throughout a geographical area. However, the cost of utilizing a cellular telephone is generally much higher than the cost of utilizing a cordless telephone service.
A radio telephone on the other hand, is enabled to access both a wide-area cellular telephone system and one or more lower-cost cordless base stations at the user's home or office, such as a so-called "microcellular" telephone system within a home or office which may be utilized to provide wireless communications within a limited range. Such a system may use either the landline telephone number or the assigned cellular telephone number to place and receive calls.
A radio telephone which transmits and receives calls in both a cellular and a cordless system typically has the capability of selecting the system within which to operate. However, the existing radio telephone systems adaptable lack technical means so as to be to both a cellular system and a cordless system, with capability of a seamless handoff of an existing telephone connection between a private microcellular or cordless system and a wide-area cellular network.
For data & voice switching in cordless mode for mobility applications there are generally separate stand alone networks based on blue tooth, WiFi, WiMax, MIMO technologies.
There are stand alone 3G / LTE networks to support voice video data services operated by the Mobile network operators.
Korean publication No. KR20020071581 discloses a private communication control device to connect a call, if the call is generated to a mobile phone with

VoIP from an extension phone, directly to a mobile communication network or an Internet network, without passing a PSTN and to support a cable phone and a wireless phone as the extension phone to enable an extension subscriber to perform speech through the cable or wireless phone.
Korean publication No. KR20060124295 describes a call center hosting service using an IP (Internet Protocol)-PBX (Private Branch Exchange) system and a VoIP (Voice over IP) service to be capable of introducing and using a call center service by using the Internet and an IP phone only without installing a PBX system and a telephone network which were constructed in a company, thus the call center service can be smoothly introduced to the company. A soft switch makes communication with the external PSTN possible. A billing server calculates and manages communication charges with the outside.
US patent no 6,014,377 discloses a system and method for an integrated wireless-wireline network for serving the Private Branch Exchange (PBX) network.
US patent no 6,256,512 describes a method for mobile-to-private branch exchange (PBX) telecommunications including a process for delivering calls from an originating mobile switching center (MSC-O) serving a calling mobile subscriber to a called subscriber' land-line unit by dialing an extension within a PBX. The cited invention more particularly teaches a method of employing existing message definitions to obtain a temporary local directory number (TLDN) to facilitate call delivery from the MSC-0 to the called PBX extension.
US publication no 20070070948 discloses a method of and an apparatus for establishing and handling voices calls for mobile communication devices to

facilitate handover of the voice calls between heterogeneous wireless networks (e.g. WLAN/802.11/SIP technologies vs. WWAN/cellular technologies).
US publication 20060234747 describes a method of providing telephone communication and includes allowing a group call between four or more participants. Each participant calls from a separate telephone device that communicates with a base transceiver station that is coupled to a distributed mobile architecture server. The method also includes providing full duplex calling capability between all participants via one or more of the distributed mobile architecture servers. One or more participants is/are enabled to disconnect him/then from the group call without affecting other remainder participants to continue communications. Further, one or more participants can be added to participate in the group-communications.
US publication no. 20080123833 discloses a telephone system employed for example, as a call center and its call controlling method.
US publication no 20050141689 relates to a method of and a system for providing off-hook/on-hook presence notification for a PBX phone including call control, establishing media sessions concurrent with PBX telephonic communication including customized call treatment for a PBX phone, call transfer capability between a PBX phone and numerous other devices.
The publication entitle "Mobile telesystems converges fixed and mobile telephony by Cisco Systems" provides MTS and FMC solution that overcame some of the prior art disadvantages and propose a reliable, productive, easy-to-use system.
The publication entitled "Fixed-mobile convergence-seamless voice inside and outside the enterprise by Siemens" enables the users to use one number, one

address book and one voicemail, taking advantage of a less expensive, highspeed connectivity in their office setting, fixed-line home environment or public hotspot location, while enjoying wide-ranging mobility on existing Public Mobile Networks.
This cited publication describes specific devices and constitutes more of a Unified Messaging Service provider enabling Fixed Mobile Convergence. However, Coral's solution actually involves a possible solution of the said objectives in other protocols. Over here the address book is used also but is not limited to above usage only.
Thus, there exists a need for a method and a system which is capable of providing seamless rerouting of existing telephone connections between local radio networks and an extended radio network.
OBJECTS OF THE INVENTION
It is therefore an object of the present invention to propose a device for fixed and mobile telephony convergence with a common embedded control means to switch voice, data & video calls from one protocol to another protocol and over any media to any media.
Another object of the present invention is to propose a device for fixed and mobile telephony convergence, which supports mobility within specified geographical location, seamlessly integrated with the PBX, LAN & wireless network of an enterprise.

Still another object of the present invention is to propose a device for fixed and mobile telephony convergence, which supports seamless movement of the user with his/her mobile handset across specified geographic locations using a soft switching core as the central control.
Yet another object of the present invention is to propose a device for fixed and mobile telephony convergence, which can handle various telecom connectivities including but not limited to Voice Data Video, SMS, GPS & GPRS based services.
A further object of the present invention is to propose a device for fixed and mobile telephony convergence, in which embedded data allows generating prepaid and post paid billing in the CPU for all the services.
A still further object of the present invention is to propose a device for fixed and mobile telephony convergence, which supports any telecom protocol used in a private network.
Yet further object of the present invention is to propose a device for fixed and mobile telephony convergence, which supports all the traditional PBX functions seamlessly across the network.
Another object of the present invention is to propose a device for fixed and mobile telephony, convergence which is easy to use and operable by unskilled operator.
Still another object of the present invention is to propose a device for fixed and mobile telephony convergence which is cost effective.

Yet another object of the present invention is to propose a device for fixed and mobile telephony convergence which is user friendly.
At the outset of the description, which follows, it is to be understood that the ensuing description only illustrates a particular form of this invention. However, such a particular form is only an exemplary embodiment, and without intending to imply any limitation on the scope of this invention. Accordingly, the description is to be understood as an exemplary embodiment and teaching of the invention and not intended to be taken restrictively.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
Figure 1 - shows a device in a working mode with some possible connectivities according to the invention.
SUMMARY OF THE INVENTION
Accordingly, there is provided a device for fixed and mobile telephony convergence enabled to operate a plurality of GSM - based mobile telephone sets as extensions of a PBX of a filed telephony, the device comprising a housing having a plurality of interfaces to connect or disconnect multiple wireless network; and a processor embedded with an embedded soft switch control means to switch voice calls from one protocol to another, and from one extension to other extension; wherein the device is connected to or incorporated in the PBX of the fixed telephony.
DETAIL DESCRIPTION OF THE INVENTION
The present invention includes and implements the following features particularly

the structural as well as software structure as under:
• The device is enabled to provide a "fixed and mobile telephony convergence" platform that allows integration of a GSM mobile handsets and a fixed telephony infrastructure with seamlessly operations in respect of hands off.
• According to the invention, and as shown in figure-1, the system can provide a "fixed mobile convergence" platform that allows organizations to integrate GSM mobile handsets and fixed telephony infrastructure with features operating seamlessly irrespective of instrument used for communication.
• The device is provided with a common Embedded Control Card to switch Voice, data and Video Calls from any protocol to any protocol and over any media to any media. Support from common control cards will include but not limited to Voice Data Video, SMS, GPS & GPRS based services
• The embedded soft-switch based common Control Cards is enabled to monitor and control call routine number translation, LCR and display of Call Charges on a GSM handset.
• The device is enabled to provide a plurality of connectivities from CNR radio
. to IP, UHF / VHF connectivity. It can work seamlessly across geographic
locations using NGX or soft switching as the core. Control processes can be duplicate and redundant.
• The central Control Card allows seamless Call Control for Calls across
Pots/Quad Cable based railway Connectivity's / E&M Channels /IP
(SIP/H.323)/ Combat Net Radio (CNR) Networks/ UHF and vhf Radio sets.

• The common Control facilitates seamless feature availability for Call transfer/ Call forward/Least Cost Routing (LCR) / Unified Messaging System (UMS)/ Pre-paid and Post Paid Billing/ Conference Facilities/ Automatic Call Distribution (ACD) for Call Center Environment.
• Further, all the traditional PBX functions like Key Telephone phone integration for status display of extensions seamlessly across the network including the digital phones. IP phones, analog phones and GSM mobile phones, are possible through the device.
• Prepaid and post-paid billing is possible in the device with soft-switch based common control card. The device is enabled to operate across the network with any combination of Access devices like Pots/ E&M Channels/ IP (SIP / H.323)/ Combat Net Radio (CNR) Networks/ UHF and vhf Radio sets.
• Common Control system ensures seamless support for TDM/SIP/SS7/V5.2/PRI/Q-Sig protocols.
• Common control and monitoring system that will handle all control functions for ADSL connectivities over wired subscribers and GPRS services to 3G / LTE based mobile devices.
• Common control card that will handle SMS & GPS based services for all mobile & wired subscribers seamlessly.
• A network that will also service mobile roaming subscribers of one or more city wide mobile operator so that the RF frequency within the building /

Campus can be most optimally utilized. Roaming subscribers may or may not be allowed to interoperate with the private subscribers of the network.
According to the invention, a GSM handsets is adapted as a wireless extension of a PBX to provide a seamless Call Control for Calls across Pots/ E&M Channels/ IP (SIP/ H.323)/ Combat Net Radio (CNR) Networks/ UHF and vhf Radio sets. A device such as this with a Common Control means working in synchronization with all the protocols connected is not taught by prior art. The device is enabled to provide a seamless Call transfer/ Call Forward/ Least Cost Routing (LCR)/ Unified Messaging System (UMS)/ Pre-paid and Past Paid Billing/ Conference Facilities Automatic Call Distribution (ACD) for Call Center Environments.
The device is a soft switch at the care that can support multiple locations with a distributed or centralized call processing architecture hence can act as a hosted solution that can work across geographically located offices.
Key to the invention resides in "frequency reuse" for service providers whereby local switching takes place in a private network thereby saving huge frequency of the Public Network.
Most networks require Tl /El as the physical layer interface to carry this communication support 3G environments. Communication between the BTS to BSC and then to MSC is on Ethernet thus the same can be conveniently backhauled on "Coral Maksat" IP radios.
The device is adaptable to any protocol like: El, PRI, E&M, Magneto/ IP/ SIP/ MGCP/ MAGACO/ Quad cable / UHF/VHF sets/TWT/BWT/MSC/BSC functionality in a single box solution where switching is supported across so many protocols.

The present invention is applicable to:
Call Centers Hospitality Industry, Police Departments, Railways and Paramilitary Organizations have special requirements from a PBX system and "Coral Air-NGX will support all these specialized service requirements while deploying some of the extensions on GSM mobile handsets.
Disaster Recovery Sites for Railways, Army, etc: Disaster recovery server architecture will provide the required resilience for mission critical applications and will manage the network in the event of disaster.
The inventive device provides a cost effective solution for provisioning of telephone services in rural areas. Integrated pre paid and post paid billing solutions on the system CPU will make it low cost.
The device works on 12 V/24 V / 48 V batteries so that even if some batteries fail in the rural environment the system will continue to work.
It is user-friendly in respect of billing / operation too.
• The present invention is capable to support all the traditional PBX functions like Key Telephone integration for status display of extensions seamlessly across the network including the digital phones, IP phones, analog phones and GSM mobile phones.
Thus, the present invention provides a device for private telecommunication switching systems where various telecom protocols are interconnected together

including the wireless hand held device as wireless extensions with embedded soft-switch based common and central call control to manage, monitor and control call routing, number translation, least cost routing and call charges for various devices connected to the switch including and not limited to the wireless hand held device. According to the invention, the PBXs are bundled with wireless hand held device as wireless extensions of the PBX as an in-building solution with a central control providing seamless call control for calls from any protocol to any protocol and over any media to any media. The present invention provides mobility voice services to every PBX extension user, having a GSM handset registered in a Private Network, thereby replacing expensive cordless telephone systems. Every call is routed through the least expensive route by means built into the PBX.
The proposed invention supports a common control which enables seamless features availability for call transfer/ call forward/ least cost routing (LCR) / unified messaging system (UMS)/ pre-paid and post paid billing/ conference facilities/ automatic call distribution (ACD) for call center environments. The present system is an amalgamation of the wire-line legacy PBX system with the wireless hand held device supporting 2G, 2.5 G, 3G & 4 G applications wherein the PBX wired extensions can work seamlessly with wireless handsets (GSM or CDMA) that act as extensions from the central control station.. Further, specialized telecom connectivity can be made available in private networks like VHF / UHF / CNR (Combat Net Radio) / Mganeto trunks / E&M. The system has embedded soft-switch based common control cards to manage, monitor and control call routing, number translation, least cost routing and display of call charges on wireless device. It handles various telecom connectivities but yet retains the user friendly commands for system configuration and use.

In an aspect of the present invention, the number of connectivity is provided in a single device from CNR radio to IP, UHF /VHF connectivity's. It works seamlessly across geographic locations using soft switching as the core. The device also supports all the functions of PBX. It has embedded prepaid and post-paid billing in the processing unit which makes the operation simple. This is a soft switch at the core that can support multiple locations with a distributed or centralized call processing architecture hence can act as a hosted solution that can work across geographically located offices.
The device according to the present invention is an upgraded version that supports mobile switching centers (MSCs) and Radio Access Network (RAN) with an integrated home location register (HLR) function so as to support wireless applications for private networks. Communications between MSC to RAN (Radio Access Network) is on Ethernet where the transport costs are lower and makes the total network more cost effective. The service provider can reuse frequency of the non contiguous cell thereby adding to its capacity to handle subscribers.
The invention is herein described in respect of specific particular exemplary embodiments.
It is to be understood that the above-described embodiments are illustrative of only a few of the many possible specific embodiments, which represent some particular applications of the principles of the invention. However, numerous varied and arrangements can be readily devised in accordance with the principles of the invention as herein disclosed by those skilled in the art without departing from the spirit and scope of the invention, which however still remains within the protection to be sought for by the presentable claims of the application.

WE CLAIM
1. A device for fixed and mobile telephony convergence enabled to operate a
plurality of GSM - based mobile telephone sets as extensions of a PBX of
a filed telephony, the device comprising:
- a housing having a plurality of interfaces to connect or disconnect multiple wireless network; and
- a processor embedded with an embedded soft switch control means to switch voice calls from one protocol to another, and from one extension to other extension;
wherein the device is connected to or incorporated in the PBX of the fixed telephony.
2. The device as claimed in claim 1, wherein it is adaptable to any protocol like: El, PRI, E&M, Magneto/ IP/ SIP/ MGCP/ MAGACO/ Quad cable / UHF/VHF sets/TWT/BWT/MSC/BSC functionality in a single box solution where switching is supported across so many protocols.
3. The device as claimed in claim 1, wherein the device is enabled to seamlessly transfer, forward, monitor, and number translation of the voice calls.
4. The device as claimed in claim 1, wherein it is configured to provide the subscribers with roaming services over one or more city so that the RF frequency within the building / Campus can be most optimally utilized, wherein roaming subscribers may or may not be allowed to interoperate with the private subscribers of the network.

5. The device as claimed in claim 1, wherein the common Embedded Control Card is enabled to switch Voice data and Video Calls from any protocol to any protocol and over any media to any media, and wherein the support from common control cards include but not limited to Voice Data Video, SMS, GPS & GPRS based services.
6. The device as claimed in any of the preceding claims, wherein the device is enabled to provide a plurality of connectivities from CNR radio to IP, UHF / VHF connectivity, and operate seamlessly across geographic locations using NGX or soft switching as the core.
7. The device as claimed in claim 1, wherein a central Control Card allows seamless Call Control for Calls across Pots/Quad Cable based railway Connectivity's / E&M Channels /IP (SIP/H.323)/ Combat Net Radio (CNR) Networks/ UHF and vhf Radio sets.
8. The device as claimed in claim 1, comprising a display to exhibit the call charges.
9. The device as claimed in claim 1, or 3, comprising a printer to generate billing documents based on the display data.