Telephone memory controller arrangement
US4860349A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1988 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Nov 25, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/2745
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Telephone numbers are stored and retrieved for automatic redialling by an arrangement that includes a memory map of bits. Each bit is uniquely associated with a respective redial key and a respective memory bank of the arrangement. Each memory bank has a capacity sufficient to store a telephone number. Actuation of a predefined one of the redial keys always results in redialling of the last telephone number stored. If one of the other redial keys is actuated after telephone dialling, a memory management unit of the arrangement assigns a first value to the bit uniquely associated with that key and an available memory bank. Subsequent actuation of that other key then results in automatic redialling of the telephone number associated with that key. In a further form of the invention, one of the other redial keys may be actuated during, rather than after, dialling of the telephone number. In such case, subsequent actuation of that other key results in redialling of the telephone number that was stored prior to the previous actuation of that key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.