Telecommunications system
First Claim
1. A telecommunications system for selectively interconnecting a plurality of network terminals, comprising:
- means for establishing a communications link with a network terminal so that a transaction can be established to or from that terminal,means for releasing the communications link with said network terminal upon termination of a transaction from or to said network terminal;
indicating means settable to indicate whether an attempt to make a further transaction with said network terminal has been or is to be made, without a communications link for the attempted further transaction being maintained with a source of said further transaction;
means responsive to the setting of the indicating means for preventing release of all or part of the communications link with said network terminal;
means for detecting termination of a first transaction from or to said network terminal; and
means for attempting to establish the previously attempted further transaction when the first transaction is terminated.
2 Assignments
0 Petitions
Accused Products
Abstract
In a telephone network, e.g. a cellular radio system, after a transaction at the connection management layer CM has ended, for example at the end of a telephone call, the lower layers are not automatically released. If another connection is to be set up on ending of the current call, e.g. a voice message or `Call Completion to Busy Subscriber` arrangement, a flag F is set in the connection management system CM. The status of the flag F is used to determine if the signalling connection towards a termination B should be kept or released immediately. Depending on the status of the flag F different actions are taken in the network. The connection is maintained for a predetermined interval.
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Citations
42 Claims
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1. A telecommunications system for selectively interconnecting a plurality of network terminals, comprising:
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means for establishing a communications link with a network terminal so that a transaction can be established to or from that terminal, means for releasing the communications link with said network terminal upon termination of a transaction from or to said network terminal; indicating means settable to indicate whether an attempt to make a further transaction with said network terminal has been or is to be made, without a communications link for the attempted further transaction being maintained with a source of said further transaction; means responsive to the setting of the indicating means for preventing release of all or part of the communications link with said network terminal; means for detecting termination of a first transaction from or to said network terminal; and means for attempting to establish the previously attempted further transaction when the first transaction is terminated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 16, 18, 19)
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- 9. A method of operating a telecommunications system to control release of a communications link to a first network terminal at the end of a transaction, wherein if an attempt to make a further transaction involving the first network terminal has been made, without maintaining a communications link for the further attempted transaction with a source of said further transaction, preventing release of all or part of the communications link with the first network terminal, detecting termination of a first transaction from or to the first network terminal and attempting to establish the previously attempted further transaction when the first transaction is terminated.
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22. A telecommunications system comprising:
a plurality of switching centers, including plural foreign switching centers, for establishing communication links with one or more network terminals, so that a network terminal can establish a communication link through different switching centers at different times, at least a first and a second of the foreign switching centers including register means to store data associated with the network terminals relating to the activation state of one or more functions relating to the status of calls, call attempts in progress associated with the terminals and further transactions attempted with said terminal during a time when said terminal is unavailable for completing said transaction, wherein means are provided to transfer such data from the register means of the first foreign switching center to the register means of the second foreign switching center when communication with the network terminal is transferred from the first foreign switching center to the second foreign switching center. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
- 33. A method of operating a telecommunications system in which network terminals can establish communication links with different switching centers at different times, and in which data relating to the activation state of one or more functions relating to the status of calls and call attempts in progress associated with the network terminals is stored in a register associated with a first switching center through which a respective terminal is currently in communication, wherein when communication with the network terminal is transferred to a second switching center transmitting said data to a register associated with the second switching center.
Specification