Modular expandable telecommunication system
First Claim
1. A modular expandable telecommunication system, including a private automatic branch exchange system (PABX), comprising a main or primary cabinet and at least one expansion or secondary cabinet, which are interconnected with each other in order to obtain an extended telecommunication system with increased connection possibilities for extensions and trunks, wherein the main cabinet and each of the expansion cabinets comprise a transmission interface unit allowing connection of said at least one expansion cabinet with said main cabinet via a single transmission link conveying voice/data channels and low level or local signaling for performing at least mutual synchronization and clock recovery for all interconnected cabinets, the main cabinet comprising a master clock device, a central processing unit (CPU) for running an application and a digital signal processor (DSP) for routing higher level messages issued by the CPU depending on the physical location of a destination cabinetswherein each transmission interface unit comprises means providing synchronization with clock recovery and frame adjustment, a control channel of the corresponding expansion cabinet, remote resetting and downloading of software resident on said expansion cabinet, connecting means for short or long haul transmission and line coding and/or scrambling.
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Accused Products
Abstract
A modular expandable telecommunication system having a main cabinet and at least one expansion cabinet that are interconnected with each other to obtain an extended telecommunication system with increased connection possibilities for extensions and trunks. The main cabinet and each expansion cabinet have a transmission interface unit allowing connection of the expansion cabinet(s) to the main cabinet via a single transmission link conveying voice/data channels and low level signaling for mutual synchronization and clock recovery for all interconnected cabinets. The main cabinet has a master clock device, a CPU for running software applications and a DSP for routing the higher level messages issued by the CPU depending on the physical location of the expansion cabinet.
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Citations
16 Claims
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1. A modular expandable telecommunication system, including a private automatic branch exchange system (PABX), comprising a main or primary cabinet and at least one expansion or secondary cabinet, which are interconnected with each other in order to obtain an extended telecommunication system with increased connection possibilities for extensions and trunks, wherein the main cabinet and each of the expansion cabinets comprise a transmission interface unit allowing connection of said at least one expansion cabinet with said main cabinet via a single transmission link conveying voice/data channels and low level or local signaling for performing at least mutual synchronization and clock recovery for all interconnected cabinets, the main cabinet comprising a master clock device, a central processing unit (CPU) for running an application and a digital signal processor (DSP) for routing higher level messages issued by the CPU depending on the physical location of a destination cabinets
wherein each transmission interface unit comprises means providing synchronization with clock recovery and frame adjustment, a control channel of the corresponding expansion cabinet, remote resetting and downloading of software resident on said expansion cabinet, connecting means for short or long haul transmission and line coding and/or scrambling.
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8. A modular expandable telecommunication system, comprising:
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a first cabinet; at least one second cabinet; and a transmission interface unit allowing communication between the at least one second cabinet with the first cabinet via a single transmission link conveying voice or data channels and low level or local signaling for performing at least mutual synchronization and clock recovery, the first cabinet comprising a digital signal processor (DSP) for routing higher level messages issued by a central processing unit (CPU) of the first cabinet depending on a physical location of the at least one second cabinet; wherein each transmission interface unit comprises means providing synchronization with clock recovery and frame adjustment, a control channel of the corresponding expansion cabinet, remote resetting and downloading of software resident on said expansion cabinet, connecting means for short or long haul transmission and line coding and/or scrambling. - View Dependent Claims (9)
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10. A modular expandable telecommunications system, comprising:
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a primary cabinet; and at least one secondary cabinet; wherein the primary cabinet and the at least one secondary cabinet are interconnected with each other, wherein the primary cabinet and the at least one secondary cabinet comprises a transmission interface unit allowing connection of the at least one secondary cabinet to the primary cabinet via a single transmission link conveying voice/data channels and low level signaling for mutual synchronization and clock recovery for all interconnected cabinets, and the primary cabinet comprises a master clock device, a central processing unit (CPU) for running an application and a digital signal processor (DSP) for routing high level messages issued by the CPU that are dependent upon a physical location of the at least one secondary cabinet to which the high level message is routed; wherein each transmission interface unit comprises means for providing synchronization with clock recovery and frame adjustment, a control channel of the corresponding secondary cabinet, remote resetting and downloading of software resident on said secondary cabinet, connecting means for short or long haul transmission and line coding and/or scrambling. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification