EP0341687A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Private automatic branch exchange system
Assignee: Fujitsu Ltd
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Filing: 1989-05-10
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Granted: —
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Expires: 2009-05-10
Abstract
Abstract Disclosed is a PBX system connected through a communication line (61) to an ISDN public network (101), comprising a control unit connected to a PBX switching network. The control unit comprises a unit for adding a line accessing number (α) to a calling party address (#B) in an incoming call information (ii) received through the communication line so as to form an incoming information (iii) to be received by said extension terminal, and a unit for transmitting the incoming information including the line accessing number to the extension terminal in which the line accessing number is displayed, whereby the user can recognize whether the incoming call is from the ISDN public network or from another extension terminal accommodated by the PBX system.
Inventors
- 👤 Shigehiko Fujitsu Kurihira Haitsu-C-202 Yazawa
- 👤 Toru Ogawa
- 👤 Haruo Moritomo
- 👤 Yoshiaki Suya
- 👤 Mikio Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 04:09
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04M; H04M3/00; H04M3/42; H04M3/50; H04M3/53; H04M3/533
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
168 words
A private automatic branch exchange system connected through a communication line (61) to an ISDN public network (101), comprising: a switching network (131a) for switching between said communication line (61) connected to said ISDN public network (101) and an extension line (62) accommodated by said private automatic branch exchange system; a control means (63), operatively connected to said switching network, for controlling the switching operation of said switching network; and an extension terminal (132a) accommodated by said private automatic branch exchange system and connected through said extension line to said switching network; said control means comprising: means for adding a line accessing number (α) to a calling party address (#B) in an incoming call information (ii) received through said communication line so as to form incoming information (iii) to be received by said extension terminal; and means for transmitting said incoming information including said line accessing number to said extension terminal. said extension terminal comprising a storing means for storing said incoming information including said line accessing number.
Claim 2
Dependent Claim
168 words
A private automatic branch exchange system connected through a communication line (61) to an ISDN public network (101), comprising: a switching network (131a) for switching between said communication line (61) connected to said ISDN public network (101) and an extension line (62) accommodated by said private automatic branch exchange system; a control means (63), operatively connected to said switching network, for controlling the switching operation of said switching network; and an extension terminal (132a) accommodated by said private automatic branch exchange system and connected through said extension line to said switching network; said control means comprising: means for adding a line accessing number (α) to a calling party address (#B) in an incoming call information (ii) received through said communication line so as to form incoming information (iii) to be received by said extension terminal; and means for transmitting said incoming information including said line accessing number to said extension terminal. said extension terminal comprising a storing means for storing said incoming information including said line accessing number.
Claim 3
Dependent Claim
44 words
A private automatic branch exchange system as claimed in claim 1, wherein said line accessing number is used when a call back operation is carried out from said extension terminal through said switching network and through said communication line to said ISDN public network.
Claim 4
Dependent Claim
30 words
A private automatic branch exchange system as claimed in claim 1, wherein said communication line is a central office line connected between said ISDN public network and said switching network.
Claim 5
Dependent Claim
29 words
A private automatic branch exchange system as claimed in claim 1, wherein said communication line is a private line connected between said ISDN public network and said switching network.
Claim 6
Dependent Claim
24 words
A private automatic branch exchange system as claimed in claim 1, wherein said incoming call information (ii) is formed by a call setup message.
Claim 7
Dependent Claim
42 words
A private automatic branch exchange system as claimed in claim l, said extension terminal further comprising display means for displaying said line accessing number and said calling party address when said extension terminal receives said incoming information transmitted from said switching network.
Claim 8
Dependent Claim
41 words
A private automatic branch exchange system as claimed in claim 6, wherein said incoming information is transmitted by the use of one channel in a plurality of channels on an extension line connected between said switching network and said extension terminal.
Claim 9
Dependent Claim
20 words
A private automatic branch exchange as claimed in claim 7, wherein said plurality of channels are 2B + D channels.
Claim 10
Dependent Claim
29 words
A private automatic branch exchange as claimed in claim 7, wherein said channel for transmitting said incoming information is a control channel D in said 2B + D channels.
Claim 11
Dependent Claim
127 words
A private automatic branch exchange as claimed in claim 1, wherein said extension terminal comprises: storage means (816) for storing transferred information including an incoming message transmitted from said calling party through said switching network; display means (807) for displaying a calling party information read from said storing means; a plurality of function keys (815) for instructing predetermined functions; and terminal control means (809), operatively connected to said storage means, said function keys, and said display means, for controlling said storage means, said display means, and said function keys, whereby by using said line accessing number in said calling party information in said incoming message read from said storage means, a call back can be automatically carried out from said extension terminal to said calling party terminal.
Claim 12
Dependent Claim
30 words
A private automatic branch exchange as claimed in claim 10, wherein said storage means for storing said transfer information has a plurality of storage areas corresponding to said function keys.
Claim 13
Dependent Claim
139 words
A private automatic branch exchange as claimed in claim 11, wherein said extension terminal comprises: detecting means for detecting one of said function keys being pushed; reading means for reading said line accessing number and said calling party address information stored in a memory area corresponding to a pushed function key of said plurality of function keys; and transmitting means for transmitting the read line accessing number and the read called party address information to said switching network; whereby, when a call back is carried out from said extension terminal to said calling party which previously called said extension terminal, said switching network receives said line accessing number and said calling party address information, analyzes said accessing number, and transmits a message including said calling party address information to said ISDN public network to call back said calling party.
Claim 14
Dependent Claim
94 words
A private automatic branch exchange system as claimed in claim 10, wherein said extension terminal comprises: detecting means for detecting one of said function keys being pushed; and storage means for temporarily storing said calling party information; whereby, during a communication between said extension terminal and said calling party through said switching network, when said extension terminal detects that one of said function keys is pushed, said calling party address information temporarily stored in said storage means is transferred from a temporary storage memory area to a memory area corresponding to the pushed key.
Claim 15
Dependent Claim
56 words
A private automatic branch exchange system as claimed in claim 13, wherein when a call is to be originated from said extension terminal, if said detecting means detects that a function key is pushed, said calling party address is read from said memory area corresponding to the specified function key and transmitted to said calling party.
Claim 16
Dependent Claim
77 words
A private automatic branch exchange as claimed in claim 1, wherein said extension terminal identifies a line number provided to the calling party information in the incoming message received by said switching network, and, depending on whether the identified line number is for an extension line accommodated by said private automatic branch exchange system or for an external communication line connected between said switching network and said ISDN public network, said extension terminal generates different ringing tones.
Claim 17
Dependent Claim
79 words
A private automatic branch exchange as claimed in claim 3 or 4, wherein said extension terminal identifies a line number provided to the calling party information in the incoming message received by said switching network, and, depending on whether the identified line number is for an extension line accommodated to said private automatic branch exchange system or for an external communication line connected between said switching network and said ISDN public network, said extension terminal generates different ringing tones.
Claim 18
Dependent Claim
114 words
A private automatic branch exchange as claimed in claim 1, further comprising: calling party registered identifying information registering means (624) for previously storing a calling party registered identifying information by a predetermined registering operation carried out by a user of said extension terminal; and incoming call indicating sound switching means (809) for comparing a calling party identifying information transmitted from said switching network with said calling party registered identifying information, and depending on whether or not the same information as said calling party registered identifying information is detected in the calling party identifying information, an incoming call indicating sound for informing the user by sound of the fact of the incoming call is changed.
Claim 19
Dependent Claim
27 words
A private automatic branch exchange as claimed in claim 1, wherein said calling party identifying information is said line accessing number α for identifying said communication line.
Claim 20
Dependent Claim
113 words
A private automatic branch exchange as claimed in claim 2, further comprising: calling party registered identifying information registering means (624) for previously storing a calling party registered identifying information by a predetermined registering operation carried out by a user of said extension terminal; and incoming call indicating sound switching means (809) for comparing a calling party identifying information transmitted from said switching network with said calling party registered identifying information, and depending on whether or not the same information as said calling party registered identifying information is detected in the calling party identifying information, an incoming call indicating sound for informing the user by sound the fact of the incoming call is changed.
References Cited (Backward Citations)
No citation records indexed.
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