Mobile unit with speed dialing feature for cellular telephone network

• US 5,305,372 A
• Filed: 07/30/1992
• Issued: 04/19/1994
• Est. Priority Date: 07/30/1991
• Status: Expired due to Term

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Tomiyori, Yutaka
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): OEHLING, GEORGE J
• Application Number:
  US07/921,728
• Time in Patent Office: 628 Days
• Field of Search: 379/58, 379/59, 379/354, 379/355, 455/33.1
• US Class Current: 455/564
• CPC Class Codes: H04M 1/27485 Appending a prefix to or inserting a pause into a dialling sequence
• CPC Class Codes: H04M 1/724 User interfaces specially adapted for cordless or mobile telephones
• CPC Class Codes: H04M 11/022 Paging systems personal calling arrangements or devices G08B3/1008; selective calling networks H04W84/022
• CPC Class Codes: H04M 3/533 Voice mail systems
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: Y10S 379/912 Geographically adaptive

Abstract

A cellular telephone includes a speed dialing memory and a current location memory. International access codes respectively identified by corresponding country codes are stored in an access code memory. An indication of the current location of the telephone is stored in the current location memory. A destination address number is retrieved from the speed dialing memory in response to entry of a speed dialing code through a keypad when a call is originated. The country code of the retrieved number is compared with the stored location indication to detect a match or a mismatch. A first decision is made that the originated call is an International call if a mismatch is detected, or a second decision is made that the cell is domestic if a match is detected. In response to the first decision, an international access code is retrieved from the access code memory corresponding to the stored current location indication and appended to the retrieved address number, and in response to the second decision, the country code of the retrieved address number is replaced with a digit "0".

Claims

1. A mobile telephone for a cellular telephone network, comprising:

a numeric key pad;

a speed dialing memory;

a current location memory;

read/write means connected to said numeric keypad and to said speed dialing memory and said current location memory, the read/write means being responsive to digits entered from the keypad for storing destination address numbers into said speed dialing memory corresponding to speed dialing codes, and storing an indication of a current location of said mobile telephone into said current location memory, and responsive to a speed dialing code entered from said keypad when a call is originated for retrieving a corresponding destination address number from said speed dialing memory, each of the destination address numbers containing a country code, a toll area code, and a telephone number;

an access code memory storing a plurality of international access codes respectively identified by corresponding country codes;

control means for making a first decision that said originated call is an international call or a second decision that said call is a domestic call depending on whether the country code of the retrieved destination address number corresponds to the indication stored in the current location memory, said control means being responsive to said first decision for retrieving an international access code from said access code memory corresponding to the indication stored in said current location memory and updating the retrieved destination address number by appending thereto the retrieved international access code, and responsive to said second decision for updating the retrieved destination address number by replacing the country code thereof with a digit "0"

means for transmitting the updated destination address number to a base station of the cellular telephone network.

2. A mobile telephone as claimed in claim 1, wherein said indication stored in the current location memory is a country code, aid control means including means for comparing the country code stored in said current location memory with the country code of said retrieved destination address number to make said first decision if there is a mismatch between said compared country codes and makes said second decision if there is a match between said compared country codes.

3. A mobile telephone as claimed in claim 1, further comprising a country identification memory, wherein said indication stored in the current location memory is a user defined country identifier, and said read/write means includes means for storing a plurality of country codes identified respectively by corresponding country identifiers, said control means including means for retrieving a country code from said country identification memory corresponding to the country identifier stored in said current location memory and comparing the retrieved country code with the country code of said retrieved destination address number to make said first decision if there is a mismatch between said compared country codes and makes said second decision if there is a match between said compared country codes.

4. In a mobile telephone for a cellular telephone network, the telephone comprising a numeric keypad, a speed dialing memory, and a current location memory, said speed dialing memory storing a plurality of destination address numbers each containing a country code, a toll area code and a telephone number, said destination address numbers being respectively identified by corresponding speed dialing codes, a method for making an international or domestic call comprising the steps of:

a) storing a plurality of international access codes respectively identified by corresponding country codes in an access code memory;

b) storing an indication of a current location of said mobile telephone into said current location memory;

c) retrieving a destination address number from said speed dialing memory in response to a corresponding speed dialing code entered through said keypad when a call is originated;

d) comparing the country code of the destination address number retrieved by the step (c) with the indication stored in said current location memory to detect a match or a mismatch therebetween;

e) making a first decision that said originated call is an international call if a mismatch is detected by the step (d) and making a second decision that said originated call is a domestic call if a match is detected by the step (d);

f) in response to the first decision, retrieving an international access code from said access code memory corresponding to the indication stored in said current location memory and updating the retrieved destination address number by appending thereto the retrieved international access code;

g) in response to the second decision, updating the retrieved destination address number by replacing the country code thereof with a digit "0"; and

h) transmitting the updated destination address number to a base station of the cellular telephone network.