Dual channel ISDN terminal call identification and switching system
First Claim
1. A switching system accommodating a plurality of public lines of an Integrated Services Digital Network (ISDN) at a public line side and a plurality of terminals of the ISDN at a private line side, comprising:
- identifying means for identifying a calling terminal issuing a first channel call and issuing a second channel call, both issued at the public line side of the ISDN; and
connecting means for automatically connecting the identified calling terminal at the public line side of the ISDN to a private-side ISDN terminal without the calling terminal calling a private line number of a private ISDN terminal and upon, after issuance of the second channel call, the identifying means identifying the calling terminal as being the same calling terminal from which the first channel call was made, based upon common information obtained at the issuance of each of the first channel call and the second channel call.
1 Assignment
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Accused Products
Abstract
A connection control equipment can connect a plurality of calls originating from a terminal to a private side terminal by identifying the calling terminal. Each of the user terminals sets a calling number and a calling sub-address or a user-to-user information for identifying the terminal in a call-setting message. A switching system of the connection control equipment receives the call-setting message and stores the calling number and the calling sub-address or the user-to-user information of the message, and connects the call to a private side terminal with which the same user terminal issuing the just received call is communicating. The switching system can connect calls from the same user terminal to the same private terminal, allowing for any user terminal to freely transmit a plurality of calls without considering how to access a host computer.
49 Citations
13 Claims
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1. A switching system accommodating a plurality of public lines of an Integrated Services Digital Network (ISDN) at a public line side and a plurality of terminals of the ISDN at a private line side, comprising:
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identifying means for identifying a calling terminal issuing a first channel call and issuing a second channel call, both issued at the public line side of the ISDN; and connecting means for automatically connecting the identified calling terminal at the public line side of the ISDN to a private-side ISDN terminal without the calling terminal calling a private line number of a private ISDN terminal and upon, after issuance of the second channel call, the identifying means identifying the calling terminal as being the same calling terminal from which the first channel call was made, based upon common information obtained at the issuance of each of the first channel call and the second channel call. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A switching system, comprising:
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a memory for storing information identifying a calling terminal issuing a first channel call at a public line side of an Integrated Services Digital Network (ISDN), the ISDN including a plurality of public lines at a public line side and a plurality of private-side terminals at a private line side, to a private-side ISDN terminal; comparing means for comparing, upon receipt of information identifying a calling terminal issuing a second channel call, the stored information from the memory to the received information identifying the calling terminal issuing the second channel call; and connecting means for, in response to the comparing means determining a match between the stored and received information, connecting the second channel call of the calling terminal to a private-side ISDN terminal, without the calling terminal calling a private line number of the private-side ISDN terminal. - View Dependent Claims (12, 13)
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Specification