Title:
ELECTRONIC EXCHANGE
Document Type and Number:
Japanese Patent JPH05199308
Kind Code:
A
Abstract:
PURPOSE: To improve the service performance by devising immediate interruption even when an ISDN terminal equipment being a called terminal equipment does not reply so as to enhance the communication completion ratio.
CONSTITUTION: An ISDN incoming call processing means 20a sends an incoming call message from an exchange main body 10 to an ISDN extension interface IIF and when no reply comes from an ISDN terminal equipment A even after lapse of a prescribed time, an ISDN re-incoming call processing means 20b executes the re-incoming call message not designating the incoming call destination to the ISDN extension interface IIF and other ISDN extension interfaces B, C accommodated in the same ISDN extension interface IIF are replied.
Inventors:
KATO HITOSHI
Application Number:
JP659792A
Publication Date:
August 06, 1993
Filing Date:
January 17, 1992
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
H04M3/42; H04Q3/58; H04Q5/00; (IPC1-7): H04M3/42; H04Q3/58; H04Q5/00
Attorney, Agent or Firm:
Takehiko Suzue