Title:
【発明の名称】回線断検出方式
Document Type and Number:
Japanese Patent JP2604886
Kind Code:
B2
Inventors:
Hitoshi Fuda
Shuichi Mizusawa
Shuichi Mizusawa
Application Number:
JP16740090A
Publication Date:
April 30, 1997
Filing Date:
June 26, 1990
Export Citation:
Assignee:
NEC
Miyagi NEC Corporation
Miyagi NEC Corporation
International Classes:
H04M3/22; H04M3/32; H04M7/00; (IPC1-7): H04M3/32; H04M7/00
Attorney, Agent or Firm:
Takahashi Isamu