Call waiting processing system, and originating terminal unit, destination terminal unit and originating/destination terminal unit utilized in the same system
First Claim
1. A call waiting processing system, comprising:
- an originating terminal unit; and
a destination terminal unit;
said originating terminal unit requesting a notification of a waiting period for a call setting, to said destination terminal unit when said originating terminal unit transmits an originating call to said destination terminal at a time when said destination terminal unit is in a state of being unavailable for a call setting; and
said destination terminal unit notifying said originating terminal unit of said waiting period when said destination terminal unit receives a request for a notification of said waiting period from said originating terminal unit.
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Accused Products
Abstract
A call waiting processing system used in an ISDN network includes an originating terminal unit and a destination terminal unit. To reduce an inefficient load on the terminal units, resulting from an unacceptable call setting, the system is configured such that when the originating terminal unit is in a calling mode, provided that the destination terminal unit is in a busy mode, the originating terminal unit requests a notification of a waiting period available for call setting to the destination terminal unit. When the destination terminal unit receives a notification request for a waiting period from the originating terminal unit, it notifies the originating terminal unit of the waiting period.
15 Citations
24 Claims
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1. A call waiting processing system, comprising:
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an originating terminal unit; and a destination terminal unit; said originating terminal unit requesting a notification of a waiting period for a call setting, to said destination terminal unit when said originating terminal unit transmits an originating call to said destination terminal at a time when said destination terminal unit is in a state of being unavailable for a call setting; and said destination terminal unit notifying said originating terminal unit of said waiting period when said destination terminal unit receives a request for a notification of said waiting period from said originating terminal unit. - View Dependent Claims (2, 3)
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4. A call waiting processing system comprising:
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an originating terminal unit for notifying a destination terminal unit of a communication period for an originating call when said originating terminal unit calls to said destination terminal unit; said originating terminal unit requesting a notification of a waiting period by a time available for call setting to said originating terminal unit when said destination terminal unit is in a state of being unavailable for call setting; said destination terminal unit calculating said waiting period when said destination terminal unit receives a request for a notification of said waiting period from said originating terminal unit and for notifying said originating terminal unit of said waiting period; said originating terminal unit reserving a call setting to said destination terminal unit after said waiting period when said destination terminal unit notifies said originating terminal unit of said waiting period; wherein said destination terminal unit registers an accepted reserved call, together with a communication period between said originating terminal unit and said destination terminal unit for said accepted reserved call, notified from said originating terminal unit and a time after said waiting period for said reserved call when said destination terminal unit reserves said call setting from said originating terminal unit, said communication period being for said reserved call notified from said originating terminal unit, while said originating terminal unit registers said reserved call together with said communication period of said reserved call and a time after said waiting period for said reserved call notified from said destination terminal unit. - View Dependent Claims (5, 6)
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7. An originating terminal unit for use in a call waiting processing system, comprising:
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a communication period notifying means for notifying a destination terminal unit of a communication period necessary for a communication after calling to said destination terminal unit; and waiting period notification requesting means for requesting a notification of a waiting period by a time available for call setting to said destination terminal unit when said destination terminal unit is unable to set a call. - View Dependent Claims (8, 9, 10, 11)
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12. A destination terminal unit for use in a call waiting processing system, comprising:
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waiting period calculating means for calculating a waiting period by a time available for call setting, when a terminal unit is not able to perform a call setting; and waiting period notifying means for notifying an originating terminal unit which originates a call to the destination terminal unit of a waiting period calculated by said waiting period calculating means when a calling to the destination terminal unit cannot be set while a notification request of said waiting period from said originating terminal unit is received by said destination terminal unit. - View Dependent Claims (13, 14, 15, 16)
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17. An originating and destination terminal unit capable of operating as an originating unit for originating a call or a destination unit for receiving a call and used in a call waiting processing system, comprising:
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communication period notifying means for notifying a further destination terminal unit of a communication period necessary for communication after calling; waiting period notification requesting means for requesting a notification of a waiting period by a time for call setting to said further destination terminal unit when said further destination terminal unit cannot set a calling; waiting period calculating means for calculating a waiting period of the originating and destination terminal unit by a time for call setting when said originating and destination terminal unit cannot perform a call setting; and waiting period notifying means for notifying another terminal unit of a waiting period by a time for call setting of the originating and destination terminal unit calculated by said waiting period calculating means when a call setting cannot be performed at a destination calling from said another terminal unit while a notification request of a waiting period is received from a further originating terminal in response to a time for call setting sent from said waiting period calculating means. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification