Title:
PUBLIC PRIVATE CHANNEL CONNECTION SYSTEM
Document Type and Number:
Japanese Patent JP3225778
Kind Code:
B2
Abstract:
PURPOSE: To save a communication cost by obtaining a PBX offering a cheap public network communication charge registered in advance and sending a call to the PBX so as to effectively utilize a dedicated channel of a private network when a portable terminal calls an extension terminal in the private network.
CONSTITUTION: When a portable terminal 24 makes a call from the inside of a radio zone of a base station 22 and makes communication to an extension terminal 25, a caller dials a called party number (73+1234). Here, since a simultaneous call area number of the base station is (10), a control section of the portable terminal 24 obtains a PBX station number (71) in pairs with the simultaneous call area number (10) taking a cheapest route according to a base station PBX cross reference list stored in advance, and also obtains a telephone number (71+1111) of an additional dial receiver corresponding to the PBX station number (71) according to the additional dial receiver telephone number list. Then, the control section of the portable terminal equipment 24 sends the telephone number (71+1111) to the PBX 12 via the base station 22, the mobile communication network 21 and a 1st public network 19. Furthermore, the PBX 12 replies a response to the portable terminal 24 to connect a channel to the terminal 24.
Inventors:
Shuji Ito
Masaya Akihara
Yusuke Kinoshita
Masaya Akihara
Yusuke Kinoshita
Application Number:
JP7412795A
Publication Date:
November 05, 2001
Filing Date:
March 30, 1995
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H04M3/42; H04Q3/58; H04W48/16; H04W84/10; (IPC1-7): H04Q7/38; H04M3/42; H04Q3/58
Domestic Patent References:
| JP4133528A | ||||
| JP383479A |
Attorney, Agent or Firm:
Kaneo Miyata (1 person outside)