Title:
【発明の名称】ディジタル通信網
Document Type and Number:
Japanese Patent JP2827936
Kind Code:
B2
Abstract:
The object of the present invention is to provide a system wherein it can be retrieved whether or not two of a plurality of nodes (transmission devices) disposed in a complicated communication network, which includes control signal transmission paths and main signal transmission paths in a mixed condition, are physically connected to each other by a main signal transmission path so that setting to be performed by an operator can be performed precisely. According to the present invention, a system for detecting a connection state between two nodes in a digital communication network wherein a large number of nodes each having an intrinsic address set thereto and each having one or more ports are connected to each other by a plurality of transmission paths by which frame type digital signal is transmitted and each of the nodes relays a digital signal which arrives at one of the ports thereof to another one of the ports is characterized in that a specific bit of the frame type digital signal is allocated as a bit for connection state retrieval, and each of the nodes inhibits relaying of the specific bit.
Inventors:
KAWAKAMI HIROYUKI
Application Number:
JP30916894A
Publication Date:
November 25, 1998
Filing Date:
December 13, 1994
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
H04J3/14; H04L12/26; (IPC1-7): H04L12/24; H04L12/26
Domestic Patent References:
| JP6221346A | ||||
| JP4152733A | ||||
| JP4227143A | ||||
| JP4281638A | ||||
| JP4296136A | ||||
| JP5235938A | ||||
| JP5235946A | ||||
| JP6120968A | ||||
| JP7307741A |
Other References:
信学技報、ＩＮ９４−１２７、ｐ．３７−４８
Attorney, Agent or Firm:
Naotaka Ide