Title:
ATTENUATION AUTOMATIC SETTING CIRCUIT IN RELAY LINE INTERFACE
Document Type and Number:
Japanese Patent JP3114751
Kind Code:
B2
Abstract:
PURPOSE: To provide the attenuation automatic setting circuit in the relay line interface not reaching a new fault occurrence state by a loopback signal on the occurrence of the fault.
CONSTITUTION: The relay line interface provided with a loopback means 7 interrupting a relay line and looping back an output to an opposite equipment to its own equipment as it is made up of an attenuation means 3 setting a signal sent from its own equipment looped back through the loopback means 7 into a specified level and inputting the result to its own equipment, and the attenuation means 3 is provided with an attenuator 31 adjusting a signal level from the opposite equipment and an attenuator 32 adjusting a loopback signal level.
Inventors:
Eiji Sonoda
Application Number:
JP29304591A
Publication Date:
December 04, 2000
Filing Date:
November 08, 1991
Export Citation:
Assignee:
富士通株式会社
富士通関西通信システム株式会社
富士通関西通信システム株式会社
International Classes:
H04M3/22; H04Q3/58; (IPC1-7): H04M3/22; H04Q3/58
Domestic Patent References:
| JP6378648A | ||||
| JP62278864A |
Attorney, Agent or Firm:
Toyoaki Fukui