Communication control method for ISDN, and data terminal adaptor

Details Communication control method for ISDN, and data terminal adaptor Communication control method for ISDN, and data terminal adaptor

1992-03-18

1994-01-11

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 79, 34082506, 371 62, H04J 314

Patent

active

052788229

ABSTRACT:
A terminal adapter unit for use in a wide-band network based on an ISDN is connected in the data path between a data terminal and the ISDN, and functions to control accessing and releasing a line through the ISDN to an opposite data terminal, in accordance with whether or not data are actually being transferred between the terminals. Unnecessary line utilization costs can thereby be reduced since lengthy intervals in which the terminals are accessing the ISDN while the data transfer is interrupted, due to a data terminal failure or operating error, can be eliminated.

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patent: 4858222 (1989-08-01), Weimert et al.
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patent: 4975900 (1990-12-01), Murata et al.
patent: 4989202 (1991-01-01), Soto et al.
patent: 5079765 (1992-01-01), Nakamura
patent: 5134611 (1992-07-01), Steinka et al.
patent: 5142525 (1992-08-01), Nakatsuma

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