US3591726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of translation between a subscriber directory number and a subscriber equipment number in a telecommunication system
Assignee: Telefonaktiebolaget LM Ericsson AB
•
Filing: 1968-10-25
•
Granted: 1971-07-06
•
Expires: 1988-10-25
Abstract
Abstract A method is disclosed for translations between a subscriber directory number consisting of a number of digits and a subscriber equipment number in a telecommunication equipment. There is a plurality of digit store cells for storing all possible digits which can occur in the different digit positions. The digit store cells with the lowest digit positions are directly associated to the subscriber equipment numbers. Address conversion cells each associated with a digit store cell contain a sum of two addresses, the address of a digit in the next higher digit position and the address of a digit in the next lower digit position. Upon translation in a first direction from the subscriber directory number to the subscriber equipment number a logical operation is carried out between the sum and the first address in order to obtain the address of the digit in the next lower digit position and upon translation in a second direction from the subscriber equipment number to the subscriber directory number a logical operation is carried out between the sum and the second address in order to obtain the address of the digit in the next higher digit position. Upon translation in the first direction a comparison of the digits in the first direction a comparison of the digits in the subscriber directory number is carried out with said digits in said digit store cells so as to find the address conversion cells and upon translation in the second direction a subscriber number digit is indicated which is found in the respective digit store cell whose address is obtained by the logical operation.
Inventors
- 👤 Nils Herbert Edstrom
- 👤 Goran Anders Henrik Hemdal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:25
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/54; H04Q3/545; H04Q3/54508; H04Q3/54533
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
366 words
A method for translating a subscriber directory number consisting of a plurality of digits to a subscriber equipment number in a telecommunication equipment comprising the steps of: storing in addressable and readable digit store cells one digit of the possible digits in the highest digit position of the subscriber directory number and one digit of the possible digits of the remaining digit positions of a subscriber directory number containing at least said one digit in the highest digit position, respectively, said digit store cells being arranged in tree-structure groups defined by said subscriber directory number so that each digit cell is superordinated to a group, except for those digit store cells containing a digit of the lowest digit position in the subscriber directory number, said latter digit store cells being directly associated with a respective subscriber equipment number; storing in address conversion cells each associated with one of said digit store cells the sum of a first and a second operand, said first operand being the address of the digit store cell superordinated to the respective digit store cell group and said second operand being the address of the first digit store cell in that group to which the digit store cell associated with the address conversion cell in question is superordinated except for the digit store cells directly associated with a respective subscriber equipment number, of which to a whole group a single address conversion cell is associated containing only said first operand except for the digit store cells containing the digits of the highest digit position having associated address conversion cells containing only said second operand; performing successive comparisons between the digits of the subscriber directory number and the contents of the digit store cells in the groups defined by the respective subscriber directory number part, beginning with the highest digit position, when finding equality selecting the address conversion cell associated with said digit store cell except for said digit store cells directly associated with a respective subscriber equipment number, performing a first logical operation between the contents of only those address conversion cells having first and second operands and the respective first operand whereby the address defined by said second operand is selected.
Claim 2
Independent Claim
366 words
A method for translating a subscriber directory number consisting of a plurality of digits to a subscriber equipment number in a telecommunication equipment comprising the steps of: storing in addressable and readable digit store cells one digit of the possible digits in the highest digit position of the subscriber directory number and one digit of the possible digits of the remaining digit positions of a subscriber directory number containing at least said one digit in the highest digit position, respectively, said digit store cells being arranged in tree-structure groups defined by said subscriber directory number so that each digit cell is superordinated to a group, except for those digit store cells containing a digit of the lowest digit position in the subscriber directory number, said latter digit store cells being directly associated with a respective subscriber equipment number; storing in address conversion cells each associated with one of said digit store cells the sum of a first and a second operand, said first operand being the address of the digit store cell superordinated to the respective digit store cell group and said second operand being the address of the first digit store cell in that group to which the digit store cell associated with the address conversion cell in question is superordinated except for the digit store cells directly associated with a respective subscriber equipment number, of which to a whole group a single address conversion cell is associated containing only said first operand except for the digit store cells containing the digits of the highest digit position having associated address conversion cells containing only said second operand; performing successive comparisons between the digits of the subscriber directory number and the contents of the digit store cells in the groups defined by the respective subscriber directory number part, beginning with the highest digit position, when finding equality selecting the address conversion cell associated with said digit store cell except for said digit store cells directly associated with a respective subscriber equipment number, performing a first logical operation between the contents of only those address conversion cells having first and second operands and the respective first operand whereby the address defined by said second operand is selected.
Claim 3
Independent Claim
419 words
A method for translating a subscriber equipment number consisting of a plurality of digits to a subscriber directory number having a plurality of digits in a telecommunication equipment comprising the steps of: storing in addressable and readable digit store cells one digit of the possible digits in the highest digit position of the subscriber directory number and one digit of the possible digits of the remaining digit positions of a subscriber directory number containing at least said one digit in the highest digit position, respectively, said digit store cells being arranged in tree-structure groups defined by said subscriber directory number so that each digit cell is superordinated to a group, except for the digit store cells containing a digit of the lowest digit position in the subscriber directory number, said latter digit store cells being directly associated with a respective subscriber equipment number, the contents of the digit store cells directly associated with a respective subscriber equipment number directly indicating the digit in the lowest digit position of the subscriber directory number; storing in address conversion cells each associated with one of said digit store cells the sum of a first and a second operand, said first operand being the address of the digit store cell superordinAted to the respective digit store cell group and said second operand being the address of the first digit store cell in that group to which the digit store cell associated with the address conversion cell in question is superordinated except for the digit store cells directly associated with a respective subscriber equipment number, of which to a whole group a single address conversion cell is associated containing only said first operand except for the digit store cells containing the digit of the highest digit position having associated address conversion cells containing only said second operand; selecting by means of the address conversion cell associated with the respective group of digit store cells directly associated with a subscriber equipment number the address of the superordinated digit store cell; selecting the address conversion cell associated with the selected digit store cell; performing a logical operation between the contents of the address conversion cell and the respective second operand so that the address of the next superordinated digit store cell is selected; and repeating said selecting and logical operation steps until the digit store cell has been reached which contains the digit of the highest digit position, each time a digit store cell is selected its contents defining a digit of the subscriber directory number.
Claim 4
Independent Claim
419 words
A method for translating a subscriber equipment number consisting of a plurality of digits to a subscriber directory number having a plurality of digits in a telecommunication equipment comprising the steps of: storing in addressable and readable digit store cells one digit of the possible digits in the highest digit position of the subscriber directory number and one digit of the possible digits of the remaining digit positions of a subscriber directory number containing at least said one digit in the highest digit position, respectively, said digit store cells being arranged in tree-structure groups defined by said subscriber directory number so that each digit cell is superordinated to a group, except for the digit store cells containing a digit of the lowest digit position in the subscriber directory number, said latter digit store cells being directly associated with a respective subscriber equipment number, the contents of the digit store cells directly associated with a respective subscriber equipment number directly indicating the digit in the lowest digit position of the subscriber directory number; storing in address conversion cells each associated with one of said digit store cells the sum of a first and a second operand, said first operand being the address of the digit store cell superordinAted to the respective digit store cell group and said second operand being the address of the first digit store cell in that group to which the digit store cell associated with the address conversion cell in question is superordinated except for the digit store cells directly associated with a respective subscriber equipment number, of which to a whole group a single address conversion cell is associated containing only said first operand except for the digit store cells containing the digit of the highest digit position having associated address conversion cells containing only said second operand; selecting by means of the address conversion cell associated with the respective group of digit store cells directly associated with a subscriber equipment number the address of the superordinated digit store cell; selecting the address conversion cell associated with the selected digit store cell; performing a logical operation between the contents of the address conversion cell and the respective second operand so that the address of the next superordinated digit store cell is selected; and repeating said selecting and logical operation steps until the digit store cell has been reached which contains the digit of the highest digit position, each time a digit store cell is selected its contents defining a digit of the subscriber directory number.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said logical operation is an addition.
Claim 6
Dependent Claim
496 words
In telecommunication equipment, apparatus for translating between subscriber, directory numbers and subscriber equipment numbers characterized in that a plurality of addressable and readable store cells are arranged in main groups (A, B, C, D), each corresponding to a digit position in a subscriber directory number, whereby the positional significance of the main groups corresponds to the positional significance of the digit positions in the subscriber directory number starting from the most significant digit of the subscriber directory number and that the store cells in each main group form subgroups (a1...a3 A1...A3; b1...b4 B1...B4; b5b6 B5B6; and so on), and that together the subgroups form a tree structure in such a way that a number of subgroups in the next less significant main group are associated with each subgroup in a main group, whereby a portion of each subgroup consists of digit store cells (a1...a3, b1...b4, b5b6 and so on) storing digits which in combination with the digits in the more significant main groups can lead to a directory number corresponding to an equipment number, each digit store cell in the least significant main group corresponding to a definite exchange number, another portion of each subgroup consisting of a number of address conversion cells (A1...A3, B1...B4, B5B6 and so on), associated with the digit store cells, each address conversion storing the result from a first logical operation between the address of the digit store cell in the subgroup of the next more significant main group associated with said subgroup and the address of the first digit store cell in next least significant main group associated with the subgroup, devices (REG A, REG B and so on), for comparison of each digit in the directory number with the digits in the digit store cells in a subgroup determined by all the more significant digits in the directory number in accordance with the tree structure, means under control of said comparison devices, when equality has been found, for registering the address of the digit store cell where the equality has been found and the addresses of the address conversion cell associated with said digit store cell, and devices (AR 1, AB 2 and so on) for carrying out, at a conversion from directory to equipment numbers, a second logical operation between the contents in the address conversion cell and the address of the digit store cell in the next more significant main group that corresponds to the more significant digit of tHe directory number and for carrying out, at a conversion from equipment to directory numbers, a second logical operation between the contents of the address conversion cell of a selected main group and the address of the first digit store cell in the next less significant main group associated with said address conversion cell, and for carrying out, at the last mentioned conversion, the registering of the results of the logical operation in the respective digit store cell when the logical operation within each group is carried out.
Claim 7
Dependent Claim
496 words
In telecommunication equipment, apparatus for translating between subscriber, directory numbers and subscriber equipment numbers characterized in that a plurality of addressable and readable store cells are arranged in main groups (A, B, C, D), each corresponding to a digit position in a subscriber directory number, whereby the positional significance of the main groups corresponds to the positional significance of the digit positions in the subscriber directory number starting from the most significant digit of the subscriber directory number and that the store cells in each main group form subgroups (a1...a3 A1...A3; b1...b4 B1...B4; b5b6 B5B6; and so on), and that together the subgroups form a tree structure in such a way that a number of subgroups in the next less significant main group are associated with each subgroup in a main group, whereby a portion of each subgroup consists of digit store cells (a1...a3, b1...b4, b5b6 and so on) storing digits which in combination with the digits in the more significant main groups can lead to a directory number corresponding to an equipment number, each digit store cell in the least significant main group corresponding to a definite exchange number, another portion of each subgroup consisting of a number of address conversion cells (A1...A3, B1...B4, B5B6 and so on), associated with the digit store cells, each address conversion storing the result from a first logical operation between the address of the digit store cell in the subgroup of the next more significant main group associated with said subgroup and the address of the first digit store cell in next least significant main group associated with the subgroup, devices (REG A, REG B and so on), for comparison of each digit in the directory number with the digits in the digit store cells in a subgroup determined by all the more significant digits in the directory number in accordance with the tree structure, means under control of said comparison devices, when equality has been found, for registering the address of the digit store cell where the equality has been found and the addresses of the address conversion cell associated with said digit store cell, and devices (AR 1, AB 2 and so on) for carrying out, at a conversion from directory to equipment numbers, a second logical operation between the contents in the address conversion cell and the address of the digit store cell in the next more significant main group that corresponds to the more significant digit of tHe directory number and for carrying out, at a conversion from equipment to directory numbers, a second logical operation between the contents of the address conversion cell of a selected main group and the address of the first digit store cell in the next less significant main group associated with said address conversion cell, and for carrying out, at the last mentioned conversion, the registering of the results of the logical operation in the respective digit store cell when the logical operation within each group is carried out.
References Cited (Backward Citations)
US2897282A
Cited
US3235664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |