Maintenance communication control system in an ISDN service
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United States of America Patent
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Dec 20, 1994
Issued Date -
N/A
app pub date -
Oct 27, 1993
filing date -
Dec 21, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
A maintenance link is established according to a LAPD between first and second terminal units on a path through which subscribers' packet information is transmitted. In the first and second terminal units, first and second communication state control units are provided for controlling the consistency of the communication state between the two terminal units by sending/receiving communication state control information using the maintenance link.
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