JPH01166660A - Digital attendant board control system - Google Patents

Abstract

PURPOSE:To utilize a B channel effectively by applying transmission/reception of the 3rd layer information of information till the use of an attendant board is finished after the setting of a call. CONSTITUTION:With the operator receiving an ID number from an attendant board 1, the board 1 sends a setting request of a call of a D channel link to a central processing unit 6. The central processing unit 6 checks the normality of a call setting request, returns an acknowledge message in case of the normality to return a reply message simulatingly as well as the reception of call setting. Then the transmission and reception of information to/from the central processing unit 6 is implemented by the 3rd layer on an information message. For example, when the operator depresses a reply key, the central processing unit 6 connects the talking bus between the caller and the attendant board 1 through a time division network 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the control of a switchboard connected to a digital exchange, and particularly to a control system for a switchboard interfaced with I5DN basic access.

(Prior Art) Conventionally, a method has been adopted in which control data is sent and received over the B channel as an exchange for interfacing with l5DN basic access. This method disables one of the two precious B channels, which is very uneconomical, and at the same time, one B channel is always used as a switching board for voice, so the remaining B channel is used. If it is used to control a switching board, future development possibilities such as B channel packets will be lost.

(Problems to be Solved by the Invention) The conventional optical digital switchboard control system described above uses one B
Since the channel is invalidated, there is a drawback that if the remaining B channel is used for switching control, B channel packets etc. will not be possible.

1. The object of the present invention is to have an I5DN basic access interface that complies with CCITT recommendations, 9. to be connected to a digital exchange, 9. to give an instruction to the operator to start using it, 7. The procedure requests the central processing unit to set up the call;
After that, the central processing unit sends out a pseudo response message to set up a D channel link, thereby eliminating the above drawbacks and providing a tiger digital switchboard control system configured to effectively utilize the B channel. There is a particular thing.

(Sixth means for solving the problem) The digital switchboard control method according to the present invention provides a switchboard,
It is equipped with a central processing unit.

The switchboard is connected to a digital exchange and CCIT
I5DN bake access in accordance with the recommendations of T-
It has 7 aces.

When the operator gives an instruction to the switchboard to start using the central processing unit, the central processing unit requests call setup from the switchboard according to a known procedure regarding the D channel, and sends a pseudo response message. .

(Implementation row) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a digital switchboard control system according to the present invention. In Figure 1, 1 is a switchboard, 2 is a network termination, 3 is a digital line module, 4 is a time division network, and 5 is a network termination.
1 is a standby controller, and B is a central processing unit.

In FIG. 1, a switchboard 1 has a basic access (
2B+D).

The D channel signal is terminated at the digital line module 3, after which a plurality of D channel signals are multiplexed, and then sent to the stand controller S via the time division network 4. The stand controller S serves as an interface with the central processing unit 6.

The IEZ diagram is a flowchart showing the exchange of information on the D channel of FIG.

11112 In FIG. 11112, when the head is inserted by the operator, the control circuit built in the switchboard 1
Built-in %0PID for tiger display? It is displayed as β. Then, the operator inputs the 1 and D numbers given to each operator from the board of the switchboard. When the control circuit receives the input number, it sends a D channel link call setup request to the central processing unit [8, and at the same time sends the %0PID as a parameter of the setup request.
' is also sent.

The central processing unit 5 checks the normality of %0PIDβ,
If normal, a confirmation message (CALLPROC) is returned, and at the same time as the call setting is accepted, a pseudo response message (CONN) is returned. % CALL on switchboard 1
PROC, C0NN # Upon receiving the message, the switchboard 1 is placed on-line so that information can be freely exchanged with the central processing unit 6.

Thereafter, information is exchanged with the central processing unit 6 using the eighth layer on the information message (INFO). For example, when the central processing unit 16 learns that a call that requires an operator's interaction has arrived, the central processing unit 6 sends a message to the switchboard 1 to inform that there is an incoming call. The switchboard 1 displays an indication of incoming call on the display as described above. When the operator presses the response key, the central processing unit 6 is notified of this. When the central processing unit 6 receives the information that the 1 response key has been pressed β from the switchboard 1, the central processing unit 6, although not shown in FIG. Connect a call path between them.

Thereafter, as shown in FIG. 2, the functions of the switchboard 1 are performed by sending and receiving various information, but when the operator's work is finished, the operator has to pull out the headset and the switchboard 10 control circuit inform the above of the above.

The control circuit sends a call disconnection request message (DISC) to the central processing unit 6, and the central processing unit f6 receives the above and sends a call release request message (REL). switchboard 1
Then, as described above, it becomes offline, sends out a release completion message (REL COMP), and the D channel link becomes vacant.

(Effects of the Invention) As explained above, the present invention transmits and receives switchboard control information using D channel messages, and performs calls using normal procedures between the switchboard and the central processing unit in a pseudo manner. By making the settings and then exchanging information in the 8th layer of information until the use of the switch is finished, the switch can be equipped with dedicated D channel control hardware that is only compatible with the program of the central processing unit. This has the effect that it does not need to have .

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating one implementation Nf of a digital switchboard control method according to the present invention. FIG. 2 is a flowchart showing the exchange of information on the D channel in the embodiment shown in FIG. 1...Switchboard 2...Network termination 3...Digital line module 4...Time division network 5 e s @ unit controller 6...Central processing unit 1 section

Claims (1)

[Claims] A switchboard having an ISDN basic access interface connected to a digital switchboard and complying with CCITT recommendations, and when an operator gives the switchboard an activation instruction, the switchboard provides a known procedure for the D channel. 1. A digital switchboard control system characterized by comprising a central processing unit for requesting call setup and sending a pseudo response message.