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US 7,127,263 B1Granted
Private branch exchange system
AssigneeNEC Corporation
InventorTakanobu Ihara
Life of this patent
Estimating the term…
Abstract
Each of a plurality of mobile stations is provided with a plurality of extension numbers including at least one unique extension number, and different lines are set for the plurality of extension numbers respectively. This enables a call using a line even when another call is made using another line.
Claims26
A private branch exchange system comprising:
- a plurality of mobile stations each having a numeric keypad, a plurality of extension numbers and a corresponding plurality of different line keys physically present thereon and actuatable by an operator for selecting among any one of said plurality of extension numbers for making a call, said plurality of different line keys being separate and distinct from said numeric keypad;
- a base station wirelessly connected to said plurality of mobile stations;
- and
- an exchange station for performing call control of said plurality of mobile stations through said base station.
1 more element
A private branch exchange system comprising:
- a plurality of mobile stations;
- a base station wirelessly connected to said plurality of mobile stations;
- an exchange station for performing call control of said plurality of mobile stations through said base station,
- wherein each of said plurality of mobile stations has the same extension number as that of one or more predetermined other mobile station;
- and
- wherein said plurality of mobile stations each have a numeric keypad, a plurality of extension numbers, and a corresponding plurality of different line keys physically present thereon and actuatable by an operator for selecting among any one of said plurality of extension numbers for making a call, said plurality of different line keys being separate and distinct from said numeric keypad.
3 more elements
Dependencies are inferred from the claim text.