Data communication device
First Claim
1. A data communication device for synchronous/asynchronous conversion between an asynchronous point to point protocol (PPP) device and a synchronous PPP device comprising:
- an asynchronous interface unit for performing communication of asynchronous PPP data with said asynchronous PPP device;
a synchronous interface unit for performing communication of synchronous PPP data with said synchronous PPP device;
an ACCM storage unit for storing Asynchronous Control Character Map (ACCM) value on escaping control codes; and
a synchronous/asynchronous converter for carrying out PPP synchronous/asynchronous conversion, wherein said synchronous/asynchronous converter monitors a Link Control Protocol (LCP) Configure Request from said asynchronous PPP device received by said asynchronous interface unit, stores an ACCM value included in said LCP Configure Request in said ACCM storage unit, and performs escape-processing of the control code for the data transmitted from said synchronous PPP device received by said synchronous interface unit, referring the ACCM value stored in said ACCM storage unit, after the LCP establishment.
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Accused Products
Abstract
Disclosed is a data communication device for performing synchronous/asynchronous conversion between an asynchronous point to point protocol (PPP) device and a synchronous PPP device. An asynchronous interface unit performs communication of asynchronous PPP data with the asynchronous PPP unit. A synchronous interface unit performs communication of synchronous PPP data with the synchronous PPP device. A synchronous/asynchronous converter carries out synchronous/asynchronous PPP conversion, monitors a Link Control Protocol (LCP) Configure Request and stores an Asynchronous Control Character Map (ACCM) value on control code escape included in the LCP Configure Request in an ACCM storage unit. Moreover, after the LCP is established, referring the ACCM value stored in the ACCM storage unit, the synchronous/asynchronous converter performs escape processing of the control code for the data transmitted from the synchronous PPP device.
12 Citations
11 Claims
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1. A data communication device for synchronous/asynchronous conversion between an asynchronous point to point protocol (PPP) device and a synchronous PPP device comprising:
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an asynchronous interface unit for performing communication of asynchronous PPP data with said asynchronous PPP device;
a synchronous interface unit for performing communication of synchronous PPP data with said synchronous PPP device;
an ACCM storage unit for storing Asynchronous Control Character Map (ACCM) value on escaping control codes; and
a synchronous/asynchronous converter for carrying out PPP synchronous/asynchronous conversion, wherein said synchronous/asynchronous converter monitors a Link Control Protocol (LCP) Configure Request from said asynchronous PPP device received by said asynchronous interface unit, stores an ACCM value included in said LCP Configure Request in said ACCM storage unit, and performs escape-processing of the control code for the data transmitted from said synchronous PPP device received by said synchronous interface unit, referring the ACCM value stored in said ACCM storage unit, after the LCP establishment. - View Dependent Claims (2, 3, 4, 6, 8, 10)
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5. A data communication device for synchronous/asynchronous conversion between an asynchronous point to point protocol (PPP) device and a synchronous PPP device comprising:
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(a) an asynchronous interface unit for performing communication of asynchronous PPP data with said asynchronous PPP unit;
(b) a synchronous interface unit for performing communication of synchronous PPP data with said synchronous PPP unit;
an ACCM storage unit for storing an Asynchronous Control Character Map (ACCM) value on escaping in a control code; and
a synchronous/asynchronous converter for carrying out PPP synchronous/asynchronous conversion, wherein said synchronous/asynchronous converter monitors a Link Control Protocol (LCP) Configure Response from said synchronous PPP device received by said synchronous interface unit, stores an ACCM values included in said LCP Configure Response in said ACCM storage unit, and performs escape-processing of the control code of the data transmitted from said synchronous PPP device received by said synchronous interface unit, referring the ACCM value stored in said ACCM storage unit, after the LCP establishment. - View Dependent Claims (7, 11)
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9. A data communication device for synchronous/asynchronous conversion between an asynchronous point to point protocol (PPP) device and a synchronous PPP device comprising:
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an asynchronous interface unit for performing communication of asynchronous PPP data with said asynchronous PPP device;
a synchronous interface device for performing communication of synchronous PPP data with said synchronous PPP device; and
a synchronous/asynchronous converter for exchanging data with said asynchronous interface device and said synchronous interface device respectively and for carrying out synchronous/asynchronous PPP conversion, wherein said synchronous/asynchronous converter performing escape processing of all control codes received from said synchronous PPP device.
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Specification