Private exchange for ISDN
First Claim
1. A subscriber premises network interface to a digital network, comprising:
- a first port for connection to a digital network local exchange;
a plurality of second ports for connection to analog telephone devices;
a plurality of third ports for connection to digital devices;
a fourth port for connection to at least one additional digital device; and
an exchange circuit coupled to said first, second, third and fourth ports, said exchange circuit including an exchange controller controlling communication to and from at least said second and third ports;
a circuit interface coupled to said first port for effecting a predetermined communication protocol with the local exchange; and
a digital port interface, said digital port interface coupling said fourth port with said circuit interface through a network PCM bus.
12 Assignments
0 Petitions
Accused Products
Abstract
An integrated services digital network (ISDN) private exchange device is provided, which includes connectors for connection to an ISDN local exchange, a plurality of ports for connection to respective analog telephone devices, a plurality of ports for connection to respective digital devices, and an ISDN digital port for connection to at least one additional ISDN terminal device. The private exchange device may include a pair of ports for connection to two different analog telephone devices, each having simultaneous access capability with the ISDN network. Further, the private exchange device may include four ports for connection up to four digital devices, which are each capable of simultaneously accessing the ISDN local exchange. The ISDN digital port can be connected with up to eight ISDN terminals or terminal adapters. The private exchange device may further include a detector for detecting whether the port connected to the local exchange is connected to an ISDN network or to a conventional network and for bypassing an ISDN control circuit if the system detects that it is connected to a conventional analog network.
-
Citations
72 Claims
-
1. A subscriber premises network interface to a digital network, comprising:
-
a first port for connection to a digital network local exchange; a plurality of second ports for connection to analog telephone devices; a plurality of third ports for connection to digital devices; a fourth port for connection to at least one additional digital device; and an exchange circuit coupled to said first, second, third and fourth ports, said exchange circuit including an exchange controller controlling communication to and from at least said second and third ports; a circuit interface coupled to said first port for effecting a predetermined communication protocol with the local exchange; and a digital port interface, said digital port interface coupling said fourth port with said circuit interface through a network PCM bus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A subscriber premises network interface to a digital network comprising:
-
a first port for connection to a local exchange through a telephone line; a second port for connection to at least one analog subscriber station device; a third port for connection to at least one digital subscriber station device; a network PCM bus connected to said first and third ports; a local PCM bus coupled to said second port; and an interface circuit connected between said local PCM bus and said network PCM bus, said interface circuit creating a branch from said network PCM bus providing at least one signalling path, said at least one signalling path including a terminal connected to said local PCM bus whereby devices connected to said local PCM bus gain access to said network PCM bus when said terminal is granted access according to a communication protocol. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A subscriber premises network interface to a digital network, comprising:
-
a first port coupled to a digital signal local exchange; a second port for connection to at least one analog subscriber station device; a third port for connection to at least one digital subscriber station device; a memory device storing operating instructions; and a controller coupled to said first port, said second port, said third port and said memory device for controlling communication between said first port and said second port and third ports according to the operating instructions stored in said memory device, and said controller responsive to selected control messages for updating operating instructions and other data stored in said memory; wherein said other data includes rate information for different signal carriers which may be accessed through the local exchange. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
-
-
32. A subscriber premises ISDN BRI interface between an ISDN BRI local exchange and at least one subscriber station device, comprising:
-
a first port for connection to an ISDN BRI local exchange; a second port for connection to at least one digital subscriber station device; a third port for connection to at least one analog subscriber station device; a controller effecting communication between said first port, said second port, and said third port according to a protocol stored during a configuration operation, wherein said controller is configured by signals input through said first port, said second port or said third port. - View Dependent Claims (33, 34, 35, 36, 37)
-
-
38. A subscriber premises ISDN BRI interface between an ISDN BRI local exchange and at least one subscriber station device, comprising:
-
a first port for connection to an ISDN BRI local exchange; a second port connectable to at least one analog subscriber station device; a third port connectable to at least one digital subscriber station device; a memory storing call progress tones; and a controller coupled to said memory and to said second and third ports, said controller controlling the reading of said memory such that progress tones stored in said memory are selectively output to said second port. - View Dependent Claims (39)
-
-
40. A subscriber premises ISDN BRI interface between an ISDN BRI local exchange and at least one subscriber station device, comprising:
-
a general purpose microprocessor including software instructions; means for connecting said microprocessor to an ISDN BRI local exchange; connecting means for connecting said microprocessor to at least one analog port for connection to an analog subscriber station device and to at least one digital port for connection to a digital subscriber station device; a memory device for storing audible data in a digital format; and said connecting means including a digital-to-analog interface between said at least one analog port and said microprocessor, whereby said microprocessor generates digital audible signals from audible data stored in said memory device for output to said at least one analog port. - View Dependent Claims (41, 42, 43, 44, 45, 46)
-
-
47. A subscriber premises ISDN interface between an ISDN local exchange and at least one subscriber station device, comprising:
-
a first port for connection to an ISDN local exchange and a U-port interface coupled to said first port for effecting U-boundary communication protocols; at least one second port for connection to an analog telephone device; at least one third port for connection to a digital subscriber station device; a fourth port for connection to at least one ISDN terminal; an exchange circuit coupled to said first, second, third and fourth ports, said exchange circuit including an exchange controller controlling communication to and from at least said second and third ports; and an S/T port interface coupled to said fourth port, said S/T port interface and said U-port interface interconnected by a network PCM bus. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55)
-
-
56. A subscriber premises ISDN BRI interface between an ISDN BRI local exchange and at least one subscriber station, comprising:
-
a first port for connection to an ISDN BRI local exchange; a plurality of second ports for connection to subscriber station devices; an interface circuit coupled to said first port configured to interface with said ISDN BRI local exchange; and a microprocessor coupled to said interface circuit and to said second ports, said microprocessor including a plurality of software implemented terminals selectively associated with said second ports and coupled to said ISDN BRI local exchange through said interface circuit. - View Dependent Claims (57, 58)
-
-
59. A subscriber premises ISDN BRI interface between an ISDN BRI local exchange and at least one subscriber station device, comprising:
-
A U-channel port configured to interface directly with a U channel of an ISDN BRI local exchange; at least one additional port configured to interface directly with a subscriber station device; an exchange circuit controlling communication between said U-channel port and said at least one additional port, wherein said exchange circuit includes a system for determining the type of ISDN BRI local exchange to which said ISDN BRI interface is connected and wherein said exchange circuit automatically uses ISDN BRI control signals compatible with the local exchange to which said ISDN BRI interface is connected; and a power supply for converting high voltage levels to low voltage levels to supply power to said exchange circuit and said port. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
-
-
72. A subscriber premises ISDN BRI interface between an ISDN BRI local exchange and at least one subscriber station device, comprising:
-
a U-channel port configured to interface directly with a U channel of an ISDN BRI local exchange; at least one additional port configured to interface directly with a subscriber station device; an exchange circuit controlling communication between said U-channel port and said at least one additional port, wherein said exchange circuit includes a PCM bus between said U-channel port and said at least one additional port; and a power supply for converting high voltage levels to low voltage levels to supply power to said exchange circuit and said port.
-
Specification