Electronic private branch exchange having an LCR function and a method of accessing a particular common carrier in that exchange
First Claim
1. An electronic private branch exchange having a least cost routing (LCR) function for selecting a least cost route in response to dial data inputted subsequent to an LCR access code and making a call origination through the selected route, comprising:
- first memory means for storing data indicative of a plurality of common carriers each corresponding to a telephone area code;
second memory means for storing data indicative of priorities of line costs for the respective common carriers;
third memory means for storing identification data of trunk circuits to be used when accessing each of the common carriers in correspondence with carrier access codes of the respective common carriers, each of the carrier access codes and the telephone area codes having the same number of digits;
judging means for extracting dial data having the same number of digits as the telephone area code and inputted subsequent to the LCR access code and judging whether the extracted dial data is the telephone area code or the carrier access code;
LCR call origination processing means, when the extracted dial data is the telephone area code, for capturing a trunk circuit corresponding to a least cost common carrier from among the common carriers corresponding to the extracted telephone area code and making a call origination; and
carrier accessing means, when the extracted dial data is the carrier access code, for making a call origination through the trunk circuit corresponding to the extracted carrier access code,wherein, after an LCR mode is set by inputting the LCR access code, either an LCR call origination or a carrier designated call origination is initiated at a time when the dial data having the same number of digits to the telephone area code is inputted subsequent to the LCR access code.
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Accused Products
Abstract
A call origination is made through a common carrier of the minimum line cost among a plurality of common carriers on the basis of input dial data. When a particular common carrier number is detected in the input dial data, a call origination is made preferentially through the particular common carrier corresponding to the carrier number. Thus a reduction in the communication cost using an ordinary LCR function is further made. In addition, an access to a desired common carrier is made by a very simple calling operation similar to the ordinary call operation.
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Citations
16 Claims
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1. An electronic private branch exchange having a least cost routing (LCR) function for selecting a least cost route in response to dial data inputted subsequent to an LCR access code and making a call origination through the selected route, comprising:
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first memory means for storing data indicative of a plurality of common carriers each corresponding to a telephone area code; second memory means for storing data indicative of priorities of line costs for the respective common carriers; third memory means for storing identification data of trunk circuits to be used when accessing each of the common carriers in correspondence with carrier access codes of the respective common carriers, each of the carrier access codes and the telephone area codes having the same number of digits; judging means for extracting dial data having the same number of digits as the telephone area code and inputted subsequent to the LCR access code and judging whether the extracted dial data is the telephone area code or the carrier access code; LCR call origination processing means, when the extracted dial data is the telephone area code, for capturing a trunk circuit corresponding to a least cost common carrier from among the common carriers corresponding to the extracted telephone area code and making a call origination; and carrier accessing means, when the extracted dial data is the carrier access code, for making a call origination through the trunk circuit corresponding to the extracted carrier access code, wherein, after an LCR mode is set by inputting the LCR access code, either an LCR call origination or a carrier designated call origination is initiated at a time when the dial data having the same number of digits to the telephone area code is inputted subsequent to the LCR access code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of accessing a particular common carrier for an electronic private branch exchange having a least cost routing (LCR) function for selecting a least cost route in response to dial data inputted subsequent to an LCR access code and making a call origination through the selected route, comprising the steps of:
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storing data indicative of a plurality of common carriers each corresponding to a telephone area code; storing data indicative of priorities of line costs for the respective common carriers; storing identification data of trunk circuits to be used when accessing each of the common carriers in correspondence with carrier access codes of the respective common carriers, each of the carrier access codes and the telephone area codes having the same number of digits; extracting inputted dial data having the same number of digits as the telephone area code and inputted subsequent to the LCR access code; judging whether the extracted dial data is the telephone area code or the carrier access code; when the extracted dial data is the telephone area code, capturing a trunk circuit corresponding to a least cost common carrier from among the common carriers corresponding to the extracted telephone area code and making a call origination; and when the extracted dial data is a carrier access code, making a call origination through the trunk circuit corresponding to the extracted carrier access code, wherein, by inputting the carrier access code subsequent to the LCR access code after an LCR mode is set by inputting the LCR access code, the LCR call origination is able to be switched to the carrier designated call origination at a time when the dial data having the same number of digits to the telephone area code is inputted. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification