ISDN modem capable of self-configuring to use one of a variety of pre-programmed ISDN protocols
First Claim
1. In configuring an ISDN modem to operate with an unknown ISDN switch, a method for identifying the switch type and setting the modem to operate with an ISDN protocol compatible with the switch, comprising the steps of:
- (a) setting the modem by preprogrammed code to attempt operation with a first ISDN protocol of multiple preprogrammed ISDN protocols by which the modem may be set to operate;
(b) attempting for a first preset time period to connect to the switch by using the first ISDN protocol;
(c) selecting the first ISDN protocol for continued use in the event the connection attempt in (b) is successful;
(d) setting the modem to operate by a second of the multiple ISDN protocols in the event the first preset time passes without a successful connection;
(e) attempting for a second preset time period to connect to the switch by using the second ISDN protocol;
(f) selecting the second ISDN protocol for continued use in the event the connection attempt in (e) is successful; and
(g) continuing to change the protocol to others of the ISDN protocols and to attempt to connect as in steps (a)-(f) until a successful connection is made and the protocol in use at the time of the successful connection is made is selected for continued use, or until all preprogrammed protocols are tested.
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Accused Products
Abstract
An ISDN modem is preprogrammed to operate by any one of multiple ISDN protocols, and is provided with a setup program wherein, with the modem connected to an ISDN switch, the multiple protocols are automatically tested one-at-a-time until one is found by which a successful connection to the switch may be made, or until all fail. In the event a successful connection is made, that protocol in use at the time of the successful connection is selected for continued use. In the event that all preprogrammed protocols fail, a user is offered an input mechanism whereby an alternative protocol selection may be entered for trial.
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Citations
9 Claims
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1. In configuring an ISDN modem to operate with an unknown ISDN switch, a method for identifying the switch type and setting the modem to operate with an ISDN protocol compatible with the switch, comprising the steps of:
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(a) setting the modem by preprogrammed code to attempt operation with a first ISDN protocol of multiple preprogrammed ISDN protocols by which the modem may be set to operate; (b) attempting for a first preset time period to connect to the switch by using the first ISDN protocol; (c) selecting the first ISDN protocol for continued use in the event the connection attempt in (b) is successful; (d) setting the modem to operate by a second of the multiple ISDN protocols in the event the first preset time passes without a successful connection; (e) attempting for a second preset time period to connect to the switch by using the second ISDN protocol; (f) selecting the second ISDN protocol for continued use in the event the connection attempt in (e) is successful; and (g) continuing to change the protocol to others of the ISDN protocols and to attempt to connect as in steps (a)-(f) until a successful connection is made and the protocol in use at the time of the successful connection is made is selected for continued use, or until all preprogrammed protocols are tested. - View Dependent Claims (2, 3)
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4. An ISDN modem capable of operation according to any one of multiple preprogrammed ISDN protocols, comprising:
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a scheduler for setting the modem to operate according to one after another of the preprogrammed ISDN protocols; a timed tester adapted for attempting to connect to an ISDN switch by each of the selected protocols for a preset period of time after the modem is set to operate according to each protocol; and a selector adapted for selecting the protocol for continued use that is in use at the time a successful connection is made. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification