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US 2001/0055378 A1Published application
Exchange for providing service functions for given periods of time
AssigneeNEC Corporation
InventorTOSHIO NAKAMURA
Life of this patent
Estimating the term…
Abstract
A storage device has an operation effective value memory for storing operation start days, effective period deadlines, and number of effective days of service functions. A controller does not provide a service function when an extension telephone set is operated to use the service function if the present day is past an effective period deadline stored in the operation effective value memory.
Claims10
An exchange having a plurality of classified service functions, comprising:
- main switch means for accommodating a plurality of terminals;
- an operation effective value memory for storing an operation effective value representing an effective period deadline of a service function or the number of times that the service function can effectively be used;
- and
- control means for preventing the service function from being provided to said terminal or a terminal accommodated in another exchange through a line when the terminal is operated to use the service function, if the present period is past, or the number of times that the service function has been used exceeds, said operation effective value.
1 more element
An exchange having a plurality of classified service functions, comprising:
- main switch means for accommodating a plurality terminals;
- an operation effective value memory for storing an operation effective value representing an effective period deadline of a service function or the number of times that the service function can effectively be used;
- and
- control means for providing the service function to the terminal or a terminal accommodated in another exchange through a line when the terminal is operated to use the service function, and outputting an alarm, if the present period has elapsed, or the number of times that the service function has been used exceeds, said operation effective value.
1 more element
An exchange having a plurality of classified service functions, comprising:
- main switch means for accommodating plurality of terminals;
- a memory for storing an operation start day to start a service function;
- and
- control means for preventing the service function from being provided to said terminal or a terminal accommodated in another exchange through a line when the terminal is operated to use the service function, if the present day is prior to said operation start day.
1 more element
Dependencies are inferred from the claim text.