Maintenance communication control system in an ISDN service

Details Maintenance communication control system in an ISDN service Maintenance communication control system in an ISDN service

1993-10-27

1994-12-20

Hsu, Alpus H.

Multiplex communications

Wide area network

Packet switching

370 941, 3701101, H04J 312, H04J 316

Patent

active

053751175

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.

REFERENCES:
patent: 4755992 (1988-07-01), Albal
patent: 4930123 (1990-05-01), Shimizu
patent: 4999836 (1991-03-01), Fujiwara
patent: 5012470 (1991-04-01), Shobu et al.
patent: 5042029 (1991-08-01), Hayakawa

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