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Title:
EXTENSION EXCHANGE SYSTEM
Document Type and Number:
Japanese Patent JPH05300560
Kind Code:
A
Abstract:

PURPOSE: To increase an extension exchange range and also to improve the effective use of a radio time slot by controlling this time slot for each repeating frequency.

CONSTITUTION: An extension exchange system consists of a switchboard 1, a base station 2, repeater stations 3, 30 and 40, and slave stations 4, 5 and 50. In a communication system, the radio time slots are allocated between the station 2 and the satellite stations 3-5 and 30-50 respectively. Then the communication circuits are switched at the same station 3 when the communication is carried out between the station 2 and the calling and called sides 6 and 7 via the same station 3. In such a constitution, the communication route is minimized in the system and the radio time slots of the higher order stations 2, 40 and 50 which are occupied by the station 3 can be opened to the communication carried out among the stations of other frequency levels.


Inventors:
Obata, Shinichi
Sugihara, Shigeru
Application Number:
JP1992000129303
Publication Date:
November 12, 1993
Filing Date:
April 23, 1992
Export Citation:
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Assignee:
NEC CORP
International Classes:
H04B7/204; H04J3/00; H04Q3/58; H04Q11/04; (IPC1-7): H04Q3/58; H04B7/204; H04J3/00; H04Q11/04
Attorney, Agent or Firm:
渡辺 喜平



 
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