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Patent Searching and Data


Title:
PACKET LINE BACKUP SYSTEM
Document Type and Number:
Japanese Patent JPH0715471
Kind Code:
A
Abstract:

PURPOSE: To detect the recovery of a fault of a terminal equipment line during communication through a backup line by making packet protocol processing units in duplicate.

CONSTITUTION: A packet communication path for data terminal equipments 11, 18 respectively connecting to packet exchange systems 10, 19 is set as a path from a terminal equipment accommodation circuit 21 to a time division switch 24 and a packet protocol processing unit 23 by a central controller 33 to form a terminal equipment line connection 25. The communication path when the terminal equipment line 12 or the packet protocol processing unit 23 is faulty is set as a path from a backup line 16 formed by a line exchange network 13 to a trunk 27, the time division switch 24 and the packet protocol processing unit 28 by the central controller 33 to form a backup line connection 29. When the terminal equipment line 12 is faulty especially, the packet protocol processing unit 23 monitors the fault state to detect fault recovery.


Inventors:
CHIMURA YASUBUMI
Application Number:
JP14766593A
Publication Date:
January 17, 1995
Filing Date:
June 18, 1993
Export Citation:
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Assignee:
OKI ELECTRIC IND CO LTD
International Classes:
H04B1/74; H04L1/22; H04L45/24; H04L45/247; (IPC1-7): H04L12/56; H04B1/74; H04L1/22
Attorney, Agent or Firm:
Takao Katori