Digital exchange system with function of displaying operation state of system

• US 5,737,390 A
• Filed: 09/13/1994
• Issued: 04/07/1998
• Est. Priority Date: 09/20/1993
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Mano, Hiroshi
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): Shankar, Vijay
• Application Number:
  US08/304,835
• Time in Patent Office: 1,302 Days
• Field of Search: 379/1, 379/2, 379/5, 379/10-17, 379/26, 379/242, 379/244, 379/247, 379/248, 370/13, 370/14, 370/241, 370/242, 370/247, 371/20.1, 371/22.1, 371/20.4, 371/25.1, 371/26, 371/29.1
• US Class Current: 379/9.02
• CPC Class Codes: H04M 3/244 for multiplex systems
• CPC Class Codes: H04M 9/008 Multiplex systems
• CPC Class Codes: H04Q 11/0428 Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
• CPC Class Codes: H04Q 2213/13096 Digital apparatus individually associated with a subscriber line, digital line circuits
• CPC Class Codes: H04Q 2213/13103 Memory
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/13162 Fault indication and localisation
• CPC Class Codes: H04Q 2213/13166 Fault prevention
• CPC Class Codes: H04Q 2213/13174 Data transmission, file transfer
• CPC Class Codes: H04Q 2213/13175 Graphical user interface [GUI], WWW interface, visual indication
• CPC Class Codes: H04Q 2213/13204 Protocols
• CPC Class Codes: H04Q 2213/13209 ISDN
• CPC Class Codes: H04Q 2213/13213 Counting, timing circuits
• CPC Class Codes: H04Q 2213/13214 Clock signals
• CPC Class Codes: H04Q 2213/13216 Code signals, frame structure
• CPC Class Codes: H04Q 2213/13292 Time division multiplexing, TDM
• CPC Class Codes: H04Q 2213/13299 Bus
• CPC Class Codes: H04Q 2213/13302 Magnetic elements
• CPC Class Codes: H04Q 2213/1332 Logic circuits
• CPC Class Codes: H04Q 2213/13334 Key telephone systems

Abstract

A digital key telephone system which is connected to a digital network via a digital channel, a transmission error which has occurred on the digital channel is detected, and upon detection of the transmission error, information representing the transmission error is stored in an error table. When a display request of a transmission error is input from a digital key telephone, error information stored in the error table is read out, the readout information is transferred to the digital key telephone, and the information is displayed on a display of the telephone.

Claims

1. A digital exchange apparatus which is connected to a digital communication network via a plurality of digital channels, and operates in synchronism with network clocks supplied from the digital communication network via one of the plurality of digital channels, comprising:

mode discrimination means for discriminating whether a start mode set in correspondence with said one of the digital channels which receives the network clocks is a first start mode for normally supplying the network clocks or a second start mode for supplying the network clocks only during a specific period including a communication period upon generation of a call; and

mode display means for displaying the start mode discriminated by said mode discrimination means.

2. A digital exchange apparatus according to claim 1, wherein said mode display means displays alarm information when the start mode discriminated by said mode discrimination means is the second start mode.

3. A digital exchange apparatus, which is connected to a digital communication network via a plurality of digital channels, is connected to an extension terminal device via an extension transmission path, and operates in synchronism with network clocks supplied from the digital communication network via one of the plurality of digital channels, comprising:

mode discrimination means for discriminating whether a start mode set in correspondence with said one of the plurality of channels which receives the network clocks is a first start mode for normally supplying the network clocks or a second start mode for supplying the network clocks only during a specific period including a communication period upon generation of a call; and

display control means for controlling said display to display the information representing the start mode discriminated by said mode discrimination means.

6. A digital exchange apparatus according to claim 3, wherein said mode display means displays alarm information when the start mode discriminated by said mode discrimination means is the second start mode.

7. A digital exchange apparatus according to claim 3, wherein said display control means controls said start mode discriminated by said mode discrimination means to be displayed in the display when said digital exchange apparatus has a display.

4. A digital exchange apparatus, which is connected to a digital communication network via a plurality of digital channels, is connected to an extension terminal device via an extension transmission path, and operates in synchronism with network clocks supplied from the digital communication network via one of the plurality of digital channels, comprising:

mode discrimination means for discriminating whether a start mode set in correspondence with said one of the plurality of channels which receives the network clocks is a first start mode for normally supplying the network clocks or a second start mode for supplying the network clocks only during a specific period including a communication period upon generation of a call; and

display control means for controlling said display to display the information representing the start mode discriminated by said mode discrimination means,

wherein said display control means transfers the information representing the start mode discriminated by said mode discrimination means to the extension terminal device via the extension transmission path, and displays the transferred information on a display of the extension terminal device.

5. A digital exchange apparatus, which is connected to a digital communication network via a plurality of digital channels, is connected to an extension terminal device via an extension transmission path, and operates in synchronism with network clocks supplied from the digital communication network via one of the plurality of digital channels, comprising:

mode discrimination means for discriminating whether a start mode set in correspondence with said one of the plurality of channels which receives the network clocks is a first start mode for normally supplying the network clocks or a second start mode for supplying the network clocks only during a specific period including a communication period upon generation of a call; and

display control means for controlling said display to display the information representing the start mode discriminated by said mode discrimination means,

wherein said digital exchange apparatus further comprises a maintenance terminal device connected thereto via a transmission path, and causes said display control means to transfer the information representing the start mode discriminated by said mode discrimination means to the maintenance terminal device via the transmission path, and to display the transferred information on a display of the maintenance terminal device.