Title:
REMOTE ISDN LINE MONITORING SYSTEM
Document Type and Number:
Japanese Patent JP2560605
Kind Code:
B2
Abstract:
PURPOSE: To monitor a desired ISDN line and the channel by desinating them from a remote place.
CONSTITUTION: A test control circuit 5 secures a monitor information transmission line (relay line 9 between stations) in accordance with the subscriber's number showing the signal synthesizing circuit 14 from a line stand 15. The information on designated lines and channels is separated/compressed in a signal separation circuit 6 and it is transmitted. The information is received via a monitor information transmission line and restored/synthesized in the signal synthesizing circuit 14 to monitor it by an ISDN line monitoring device 13.
Inventors:
ISHIDA EIJI
Application Number:
JP10013693A
Publication Date:
December 04, 1996
Filing Date:
April 05, 1993
Export Citation:
Assignee:
NIPPON ELECTRIC CO
International Classes:
H04M3/00; H04L12/02; H04L12/24; H04L12/26; H04M3/22; H04Q3/42; (IPC1-7): H04M3/22; H04L12/02; H04L12/24; H04L12/26; H04M3/00; H04Q3/42
Domestic Patent References:
| JP4256266A |
Attorney, Agent or Firm:
Masaki Yamakawa