Line switching apparatus and method
First Claim
1. A line switching apparatus for performing line connection between an extension and a line, comprising:
- receiving means for receiving a line-connection request signal from an extension;
discriminating means for determining whether a connection is possible to the line when the connection request signal is received from said receiving means;
sending means for sending a busy signal to the extension when said discriminating means determines that connection to the line is impossible;
detecting means for monitoring the status of the line during sending of the busy signal by said sending means, and detecting that the line is in a connectable state; and
alarm means for informing the extension of the fact that the line has been detected to be in the connectable state by said detecting means.
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Accused Products
Abstract
A line switching apparatus includes receiving circuitry for receiving a line-connection request signal from an extension, discriminating circuitry for determining whether a connection is possible to the line when the connection request signal is received from the receiving circuitry, sending circuitry for sending a busy signal to the extension when the discriminating circuitry determines that connection to the line is impossible, detecting circuitry for monitoring the status of the line during sending of the busy signal by the sending circuitry, and detecting that the line is in a connectable state, and alarm circuitry for informing the extension of the fact that the line has been detected to be in the connectable state by the detecting circuitry.
32 Citations
24 Claims
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1. A line switching apparatus for performing line connection between an extension and a line, comprising:
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receiving means for receiving a line-connection request signal from an extension; discriminating means for determining whether a connection is possible to the line when the connection request signal is received from said receiving means; sending means for sending a busy signal to the extension when said discriminating means determines that connection to the line is impossible; detecting means for monitoring the status of the line during sending of the busy signal by said sending means, and detecting that the line is in a connectable state; and alarm means for informing the extension of the fact that the line has been detected to be in the connectable state by said detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A line switching method for performing line connection between an extension and a line, comprising:
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a receiving step of receiving a line-connection request signal from an extension; a discriminating stp of determining whether a connection is possible to the line when the connection request signal is received at said receiving step; a sending step of sending a busy signal to the extension when it is determined at said discriminating step that connection to the line is impossible; a detecting stp of monitoring the status of the line during sending of the busy signal at said sending step, and detecting that the line is in a connection state; and an alarming step of informing the extension of the fact that the line has been detected to be in the connectable state at said detecting step. - View Dependent Claims (15, 16, 17)
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18. A telephone device connected to a line switching apparatus, comprising:
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means for requesting connection of a line to said line switching apparatus; input means for inputting a line reservation when said line is busy; and alarm means for informing of the fact that said line is no longer busy before the input from said input means is completed. - View Dependent Claims (19, 20, 21)
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22. A line switching apparatus comprising:
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means for registering telephone line reservation from an extension when all of a plurality of telephone lines are busy; means for alarming the extension that has made the reservation of the fact that a telephone line has become free when one of the busy telephone lines becomes free; and means for allowing one of the telephone lines to be used outside of said extension while a response to said alarm is awaited from said extension. - View Dependent Claims (23, 24)
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Specification