Telephone call dialling
First Claim
1. A device (1) for communication with a call destination (2) via a telecommunications system (3), the device comprising;
- input means (5) for receiving input data (52) defining the call destination;
message generating means (30) for generating a request message (51-55) comprising the input data (52);
output means (39) operable to output the request message in use to a control centre (7);
receiving means (39) operable to receive in use from the control centre a response message (61-64) comprising routing data (62) defining a preferred route for routing the call to the call destination via the telecommunications system; and
initiating means for initiating communication with the call destination using the routing data.
2 Assignments
0 Petitions
Accused Products
Abstract
A device for making telephone calls receives input data defining a call destination. The device generates a request message which is output to a control centre, a response message then being received from the control centre identifying a preferred route for routing the call to the call destination. The routing information is utilised by the device in initiating communication with the call destination. Typically the input data is a telephone number and the dialling means initiates communication using a modified telephone number which may include a prefix obtained from routing data contained in the response message. Response messages may be stored in a cache memory to reduce the need for request messages. The device may be a mobile telephone operating in a cellular telecommunications network or may be a landline device such as telephone or facsimile machine. Where the device is a mobile telephone, the response message may include additional information such as updating information for stored preferred network and barred network tables.
21 Citations
56 Claims
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1. A device (1) for communication with a call destination (2) via a telecommunications system (3), the device comprising;
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input means (5) for receiving input data (52) defining the call destination;
message generating means (30) for generating a request message (51-55) comprising the input data (52);
output means (39) operable to output the request message in use to a control centre (7);
receiving means (39) operable to receive in use from the control centre a response message (61-64) comprising routing data (62) defining a preferred route for routing the call to the call destination via the telecommunications system; and
initiating means for initiating communication with the call destination using the routing data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of operating a telecommunications device for communication with a call destination via a telecommunications system, the method comprising the steps of;
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receiving an input telephone number defining the call destination;
generating a request message comprising data representative of the input telephone number;
outputting the request message to a control centre;
receiving a response message from the control centre, the response message comprising routing data representative of at least part of a modified telephone number defining a preferred route for routing the call to the call destination via the telecommunications system; and
initiating a telephone call connection to the call destination using the modified telephone number. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 53, 54, 55)
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51. A control centre (7) comprising;
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receiving means operable to receive a request message comprising data representative of an input telephone number defining a call destination and information defining the location of a device from which communication with the call destination via a telecommunications system is required;
means for determining a preferred route for communication via the telecommunications system;
means for generating a response message comprising routing data representative of at least part of a modified telephone number to be used by the device;
and means for transmitting the response message to the device.
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52. A method of operating a control centre (7) comprising;
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receiving a request message comprising data representative of an input telephone number defining a call destination and information defining the location of a device from which communication with the call destination via a telecommunications system is required;
determining a preferred route for communication via the telecommunications system;
generating a response message comprising routing data representative of at least part of a modified telephone number to be used by the device;
and transmitting the response message to the device.
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56. A telephone which makes a data call to receive routing information before making a call using the routing information.
Specification