Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1998-06-25
2001-03-20
Eisenzopf, Reinhard J. (Department: 2682)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S039000, C455S556200
Reexamination Certificate
active
06205331
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method of utilizing a memory in a digital cordless telephone, and more particularly, to a method for a sharing memory between an integrated digital cordless telephone and a radio paging receiver.
2. Description of the Related Art
Recently, with the development of mobile telecommunication technology, digital cordless telephones have come into wide use. A second generation digital cordless telephone (hereinafter referred to as a “CT-2”) enables a telephone call within a 200-meter radius from a telepoint which is a wireless public base station. The CT-2 consists of a handset and a private base station like existing cordless telephones (CT-0 and CT-1), but it is distinguishable from the existing cordless telephone in that it is operable with a public base station, thus providing a superior function. The CT-2 merged with a radio paging receiver is called a CT-2 plus.
The radio paging receiver has a nonvolatile memory, EEPROM (Electrically Erasable and Programmable Read-Only Memory), and the CT-2 also has a separate EEPROM. Thus, the CT-2 plus has two EEPROMs. Both of these EEPROMs are used to store telephone numbers. However, the radio paging receiver can only store a limited number of paging data (i.e., telephone numbers) in its EEPROM. Therefore, when there are many paging calls received, the radio paging EEPROM cannot store all of the received telephone numbers. The EEPROM in the CT-2 also has a storage area where only a limited number of telephone numbers can be stored. These limiting aspects of the two EEPROMS in the CT-2 plus creates a need to share these two memories.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a method of sharing memories in a digital cordless telephone merged with a radio paging receiver (CT-2 plus).
To achieve the above object, there is provided a memory sharing method in a digital cordless telephone merged with a radio paging receiver. In the method, paging data is read from a second memory of the radio paging receiver, and received paging data is edited by deleting data other than the telephone number. The edited paging data (i.e., only the telephone number) is stored in a first memory of the digital cordless telephone. In order to store the edited telephone number, the first memory of the cordless telephone is checked for a spare storage area. If the first memory does not have a spare storage area, a second memory of the radio paging receiver is checked again for a spare storage area. As a result, if the second memory has spare storage area, the telephone number is stored in the second memory. If the second memory does not have the spare storage area, the telephone number is overwritten into the first memory.
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Appiah Charles N.
Dilworth & Barrese LLP
Eisenzopf Reinhard J.
Samsung Electronics Co,. Ltd.
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