Device and method of performing a switching control to standby system in hybrid system of duplex system and backup line

Claim 1

A method for performing a switching control to a standby system in a duplex system of a hybrid system also including a backup line, said hybrid system comprising a first exchange (1-1) including a pair of communication multiplexers (1-12, 1-13) forming said duplex system and a communication line management processor (1-11), said backup line (6) using a public network, and a second exchange (2-1) for interchanging between a line connected via said first exchange (1-1) and said backup line (6) using said public network, wherein when one of said communication multiplexers (1-12, 1-13) is switched to said standby system, a transmission regulation signal is transmitted to an opposite communication party to perform a transmission regulation, and a normal communication notification signal is transmitted after a switching operation to resume communication; said method comprising the steps of: transmitting a normal notification signal to said opposite communication party when one of said communication multiplexers (1-12, 1-13) is switched to said standby system; and transmitting a regulation releasing signal after the switching operation so that a communication is performed without using said backup line (6).

Claim 2

A method for performing a switching control to a standby system in a duplex system of a hybrid system also including a backup line, said hybrid system comprising a first exchange (1-1) including a pair of communication multiplexers (1-12, 1-13) forming said duplex system and a communication line management processor (1-11), said backup line (6) using a public network, and a second exchange (2-1) for interchanging between a line connected via said first exchange (1-1) and said backup line (6) using said public network, wherein when one of said communication multiplexers (1-12, 1-13) is switched to said standby system, a transmission regulation signal is transmitted to an opposite communication party to perform a transmission regulation, and a normal communication notification signal is transmitted after a switching operation to resume communication; said method comprising the steps of: transmitting a normal notification signal to said opposite communication party when one of said communication multiplexers (1-12, 1-13) is switched to said standby system; and transmitting a regulation releasing signal after the switching operation so that a communication is performed without using said backup line (6).

Claim 5

A device for performing a switching control to a standby system in a hybrid system having a duplex system and a backup line, said hybrid system comprising a first exchange (1-2) including a pair of communication multiplexers (1-22, 1-23) forming said duplex systems and a communication line management processor (1-21), said backup line (6) using a public network, and a second exchange (2-2) for interchanging between a line connected via said first exchange (1-2) and said backup line (6) using said public network, (whereby) wherein when one of said communication multiplexers (1-22, 1-23) is switched to said standby system, a transmission regulation signal is transmitted to an opposite communication party to perform a transmission regulation, and a normal communication notification signal is transmitted after a switching operation to resume communication; said second exchange (2-2) comprising: timer means (2-22) for counting a desired time in response to said transmission regulation signal; and control means (2-22) for inhibiting a switching command to said backup line during the time counting operation of said timer means (2-21).

Claim 6

A device for performing a switching control to a standby system in a hybrid system having a duplex system and a backup line, said hybrid system comprising a first exchange (1-2) including a pair of communication multiplexers (1-22, 1-23) forming said duplex systems and a communication line management processor (1-21), said backup line (6) using a public network, and a second exchange (2-2) for interchanging between a line connected via said first exchange (1-2) and said backup line (6) using said public network, (whereby) wherein when one of said communication multiplexers (1-22, 1-23) is switched to said standby system, a transmission regulation signal is transmitted to an opposite communication party to perform a transmission regulation, and a normal communication notification signal is transmitted after a switching operation to resume communication; said second exchange (2-2) comprising: timer means (2-22) for counting a desired time in response to said transmission regulation signal; and control means (2-22) for inhibiting a switching command to said backup line during the time counting operation of said timer means (2-21).

Claim 7

A method for performing a switching control to a standby system in a hybrid system with a duplex system and a backup line, said hybrid system including a first exchange (1-2) including a pair of communication multiplexers (1-22) forming said duplex system, and a communication line management processor (1-21), said backup line (6) using a public network, and a second exchange (2-2) for interchanging between a line connected via said first exchange (1-2) and said backup line (6) using said public network, wherein when said communication multiplexer (1-22, 1-23) is switched to said standby system, a transmission regulation signal is transmitted to an opposite communication party to perform a transmission regulation, and a normal communication notification signal is transmitted after a switching operation to resume communication; said method comprising the steps of: counting a desired time in response to said transmission regulation signal; and communicating without using said backup line during the time counting operation.

Claim 8

A method for performing a switching control to a standby system in a hybrid system with a duplex system and a backup line, said hybrid system including a first exchange (1-2) including a pair of communication multiplexers (1-22) forming said duplex system, and a communication line management processor (1-21), said backup line (6) using a public network, and a second exchange (2-2) for interchanging between a line connected via said first exchange (1-2) and said backup line (6) using said public network, wherein when said communication multiplexer (1-22, 1-23) is switched to said standby system, a transmission regulation signal is transmitted to an opposite communication party to perform a transmission regulation, and a normal communication notification signal is transmitted after a switching operation to resume communication; said method comprising the steps of: counting a desired time in response to said transmission regulation signal; and communicating without using said backup line during the time counting operation.

Claim 9

A device for performing a switching control to a standby system in a hybrid system with a duplex system and a backup line, said hybrid system comprising a first exchange (1-3) including a pair of communication multiplexers (1-32, 1-33) forming said duplex system and a communication line management processor (1-31), said backup line (6) using a public network, and a second exchange (2-3) for interchanging between a line connected via said first exchange (1-3) and said backup line (6) using said public network, wherein when one of said communication multiplexers (1-32, 1-33) is switched to said standby system, a transmission regulation signal is transmitted to an opposite communication part to perform a transmission regulation, and a normal communication notification signal is transmitted after a switching operation to resume communication; said hybrid system further comprising backup control protocol having means for transmitting an event notifying a communication multiplex device transfer occurrence before switching of said one of said communication multiplexers (1-32, 1-33), and means for an event notifying a communication multiplex device transfer completion after switching of said one of said communication multiplexers (1-32, 1-33); said second exchange (2-3) including control means (2-3) for inhibiting a switching command to said backup line even when said transmission regulation signal is received between the time a communication multiplexer transfer completion notifying event is received and the time a communication multiplexer transfer occurrence notifying event is received.

Claim 10

A device for performing a switching control to a standby system in a hybrid system with a duplex system and a backup line, said hybrid system comprising a first exchange (1-3) including a pair of communication multiplexers (1-32, 1-33) forming said duplex system and a communication line management processor (1-31), said backup line (6) using a public network, and a second exchange (2-3) for interchanging between a line connected via said first exchange (1-3) and said backup line (6) using said public network, wherein when one of said communication multiplexers (1-32, 1-33) is switched to said standby system, a transmission regulation signal is transmitted to an opposite communication part to perform a transmission regulation, and a normal communication notification signal is transmitted after a switching operation to resume communication; said hybrid system further comprising backup control protocol having means for transmitting an event notifying a communication multiplex device transfer occurrence before switching of said one of said communication multiplexers (1-32, 1-33), and means for an event notifying a communication multiplex device transfer completion after switching of said one of said communication multiplexers (1-32, 1-33); said second exchange (2-3) including control means (2-3) for inhibiting a switching command to said backup line even when said transmission regulation signal is received between the time a communication multiplexer transfer completion notifying event is received and the time a communication multiplexer transfer occurrence notifying event is received.

Claim 11

A method for performing a switching control to a standby system in a hybrid system including a duplex system of two communication multiplexers and a backup line wherein when said one of said communication multiplexers (1-32, 1-33) is switched to said standby system, a transmission regulation signal is transmitted to an opposite communication party to perform a transmission regulation, and a normal communication notification signal is transmitted after a switching operation to resume communication; said hybrid system including a first exchange incorporating said communication multiplexers, a second exchange for interchanging between a line connected via said first exchange and said backup line, and a backup control protocol, said method comprising the steps of transmitting an event notifying a communication multiplex device transfer occurrence before switching of one of said communication multiplexers (1-32, 1-33); and transmitting an event notifying a communication multiplex device transfer completion after switching of said one of said communication multiplexers (1-32, 1-33); wherein a communication is performed without using said backup line to said second exchange (2-3) even when said transmission regulation signal is received between the time a communication multiplexer transfer completion notifying event is received and the time a communication multiplexer transfer occurrence notifying event is received.

Claim 12

A method for performing a switching control to a standby system in a hybrid system including a duplex system of two communication multiplexers and a backup line wherein when said one of said communication multiplexers (1-32, 1-33) is switched to said standby system, a transmission regulation signal is transmitted to an opposite communication party to perform a transmission regulation, and a normal communication notification signal is transmitted after a switching operation to resume communication; said hybrid system including a first exchange incorporating said communication multiplexers, a second exchange for interchanging between a line connected via said first exchange and said backup line, and a backup control protocol, said method comprising the steps of transmitting an event notifying a communication multiplex device transfer occurrence before switching of one of said communication multiplexers (1-32, 1-33); and transmitting an event notifying a communication multiplex device transfer completion after switching of said one of said communication multiplexers (1-32, 1-33); wherein a communication is performed without using said backup line to said second exchange (2-3) even when said transmission regulation signal is received between the time a communication multiplexer transfer completion notifying event is received and the time a communication multiplexer transfer occurrence notifying event is received.