Telephone system capable of utilizing telephone number information stored in parent portable telephone unit by a plurality of child portable telephone units

A telephone system comprising:

• a parent telephone unit, and
• a plurality of child telephone units capable of radio-communicating with said parent telephone unit,
• wherein said parent telephone unit includes a telephone number data storaer storing therein a plurality of telephone number data indicative of a plurality of telephone numbers commonly usable by said plurality of child telephone units,
• wherein each of said plurality of child telephone units issues a telephone number retrieve command as an issuing child telephone unit,
• wherein said parent telephone unit searches said telephone number data storage table in response to said telephone number retrieve command issued from said issuing child telephone unit to output a searching result to said issuing child telephone unit,
• wherein said issuing child telephone unit receives said searching result outputted from said parent telephone unit to output said received searching result to a user of said issuing child telephone unit,
• wherein a specific identification number is allocated to each of said plurality of child telephone units,
• wherein said parent telephone unit further comprises an identification number data storage table which stores a plurality of data indicative of said specific identification numbers,
• wherein said retrieve command contains said identification number data allocated to said issuing child telephone unit,
• wherein said parent telephone unit judges whether said identification number data outputted from said issuing child telephone unit is coincident with one of said plurality of identification number data stored in said identification number data storage table, and searches said telephone number data storage table in response to said retrieve command when it is judged that said identification number data outputted from said issuing child telephone unit is coincident with said identification number data stored in said identification number data storage table.

A telephone system comprising:

• a parent telephone unit, and
• a plurality of child telephone units capable of radio-communicating with said parent telephone unit,
• wherein said parent telephone unit includes a telephone number data storage table for storing therein a plurality of telephone number data indicative of a plurality of telephone numbers commonly usable by said plurality of child telephone units,
• wherein each of said plurality of child telephone units issues a telephone number retrieve command as an issuing child telephone unit,
• wherein said parent telephone unit searches said telephone number data storage table in response to said telephone number retrieve command issued from said issuing child telephone unit to output a searching result to said issuing child telephone unit,
• wherein said issuing child telephone unit receives said searching result outputted from said parent telephone unit to output said received searching result to a user of said issuing child telephone unit,
• wherein said telephone number data storage table further stores therein an attribute data associated with each of said plurality of telephone numbers;
• said retrieve command contains said attribute data which is designated as a retrieve condition by said issuing child telephone unit;
• and
• said parent telephone unit outputs as said searching result said telephone number corresponding to said attribute data contained in said retrieve command.

A method for searching a telephone number, comprising:

• issuing a telephone number retrieve command from each of a plurality of radio child telephone units;
• searching a telephone number data storage table for storing therein a plurality of telephone number data indicative of a plurality of telephone numbers commonly usable by said plurality of child telephone units, in response to said retrieve command to thereby produce a searching result in a parent telephone unit;
• and
• outputting said searching result to said issuing child telephone unit;
• wherein said child telephone units communicate with said parent telephone unit through a public telephone network.

A method for searching a telephone number comprising:

• issuing a telephone number retrieve command from each of a plurality of radio child telephone units;
• searching a telephone number data storage table for storing therein a plurality of telephone number data indicative of a plurality of telephone numbers commonly usable by said plurality of child telephone units, in response to said retrieve command to thereby produce a searching result in a parent telephone unit;
• outputting said searching result to said issuing child telephone unit;
• allocating a specific identification number to each of said plurality of radio child telephone units;
• storing a plurality of data indicative of said specific identification numbers in said telephone number data storage table;
• containing said identification number data in said retrieve command when said retrieve command is issued;
• and
• judging whether said identification number data contained in said retrieve command is coincident with one of said identification number data stored in said telephone number data storage table in said parent telephone unit;
• and
• searching said telephone number data storage table in response to said retrieve command when it is judged that said identification number data contained in said retrieve command is coincident with said identification number data stored in said identification number data storage table.

A method for searching a telephone number comprising:

• issuing a telephone number retrieve command from each of a plurality of radio child telephone units;
• searching a telephone number data storage table for storing therein a plurality of telephone number data indicative of a plurality of telephone numbers commonly usable by said plurality of child telephone units, in response to said retrieve command to thereby produce a searching result in a parent telephone unit;
• outputting said searching result to said issuing child telephone unit;
• storing data indicative of each of attributes of said telephone number data, which are provided in correspondence with said respective telephone number data, in said telephone number data storage table;
• containing said attribute data in said retrieve command when said retrieve command is issued;
• and
• concluding said searching result produced with reference to said telephone number data storage table in correspondence with said attribute data when responding to said retrieve command.

A method for searching a telephone number comprising:

• issuing a telephone number retrieve command from each of a plurality of radio child telephone units;
• searching a telephone number data storage table for storing therein a plurality of telephone number data indicative of a plurality of telephone numbers commonly usable by said plurality of child telephone units, in response to said retrieve command to thereby produce a searching result in a parent telephone unit;
• outputting said searching result to said issuing child telephone unit;
• allocating a specific identification number to each of said plurality of radio child telephone units;
• storing a plurality of data indicative of said specific identification numbers in said telephone number data storage table;
• proposing a provision of another radio child telephone unit capable of issuing said retrieve command, other than said radio child telephone units;
• outputting data indicative of a number proposed as said identification number of said proposing radio child telephone unit to said parent telephone unit;
• and
• judging whether one of said identification number data contained in said telephone number data storage table is coincident with said proposed identification number data;
• permitting said proposal when said proposed identification number data is not coincident with one of said identification number data stored in said telephone number data storage table.