JPH0239795A - Terminal multiplexing adapter for isdn - Google Patents

Abstract

PURPOSE:To control the priority of an incoming call for each terminal interface by setting the priority of a response according to the other party from which the incoming call is transmitted for each terminal interface and delaying the response for the incoming call. CONSTITUTION:A network side interface 100 and two sets of terminal interfaces 121 and 122 are connected through a network side layer 1 terminal circuit 1 and two sets of terminal side layer 1 terminal circuits 2A and 2B respectively connected to the terminations of the interface 100 and the interfaces 121 and 122. The title adapter is equipped with a transfer control circuit 4 to control the transfer of a D channel signal from the network side interface and plural incoming call control circuits 6A and 6B to make the D channel signal into the incoming call for the respectively connected terminal interfaces by the command of the transfer control circuit 4. Each of the respective incoming call control circuits includes a means to set the priority of the response for the incoming call and another means to delay the response for the incoming call according to the setting by the former means and preferentially receives the call transmitted from the necessary other party by delaying responses for all the transmitted calls except an emergency transmitted call.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is applied to a basic interface of ISDN.

〔overview〕

The present invention provides a terminal multiplexing adapter placed between the network side of an ISDN basic interface and a plurality of terminal interfaces, in which response priorities are set for each terminal interface depending on the other party of the incoming call, and the incoming call response By delaying , it is possible to prioritize incoming calls to each terminal interface.

[Conventional technology]

As a conventional technique, in the basic interface of ISDN, the S interface bus for subscriber access is expanded to a plurality of buses to accommodate a large number of terminals. In this case, a method for accessing each terminal is to provide an incoming call control means for each of these S interface buses and perform access using this means.

[Problem that the invention seeks to solve]

However, when a plurality of the above-mentioned S interface buses are installed in one premises, each S interface bus may be installed in different rooms. In such a case, for example, if a sales manager who receives an emergency order from a customer is sitting near a terminal in a room, this terminal will be used for internal communications or for subcontractors to place urgent orders rather than receiving calls from vendors. Although incoming calls from customers should be given priority, conventional systems cannot perform this priority control.

SUMMARY OF THE INVENTION An object of the present invention is to solve these drawbacks and provide a terminal multiplexing adapter that can perform priority control of incoming call responses for each terminal.

[Means for solving problems]

The present invention includes a transmission control circuit that controls the transfer of D channel signals from a network side interface, and a plurality of incoming control circuits that cause D channel signals to arrive at respective connected terminal interfaces according to instructions from the transfer control circuit. ,
In an ISDN terminal multiplexing adapter placed between a network side interface and a plurality of terminal interfaces,
Each incoming call control circuit is characterized in that it includes means for setting priorities for incoming call responses, and means for delaying responses to incoming calls in accordance with the settings of this means.

[Effect]

The present invention includes a D-channel signal transfer control circuit for identifying a call originating from a network side interface, and means for determining the response delay time of each terminal interface. Therefore, for example, at a terminal near a sales manager who receives an emergency call from a customer, priority is given to calling the necessary party by delaying the response to calls other than emergency calls. You can receive calls.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a block diagram of an embodiment of the present invention, and FIG. 2 shows a detailed diagram of the incoming call control circuit shown in FIG.

FIG. 1 shows a shoulder interface 100, which is a basic interface, and two sets of terminal interfaces 121.
．． 122 are connected to the respective terminations of the layer 1 termination circuit 1 on the network side and the two sets of layer 1 terminating circuits 2A on the termination side.
, 2B. The signal received from the network side is separated by the layer 1 # end circuit 1 on the network side, the B1 channel 101 and the B2 channel 102 are sent to the B channel switching circuit 3, and the D channel 103 is sent to the B channel switching circuit 3.
The signal is sent to the D channel signal transfer control circuit 4 on the network side. This D channel 103 is in broadcast format, and is connected to a D channel signal transfer control circuit 5A on the terminal side from the D channel signal transfer control circuit 4,
D channel signal 1 to 5B and incoming control circuits 6A and 6B.
05, and the layer 1 termination circuit 2A, 2 on the terminal side
B incoming control is performed, the B channel switching circuit 3 is switched via the D channel signal monitor circuit 7 and the B channel switching control circuit 8, the B channel is multiplexed, and the signal is sent to the terminal interfaces 121 and 122. Conversely, the signals from the terminal interfaces 121 and 122 are #-terminated by the layer 1 terminal circuits 2A and 2B on each terminal side, and the D channel signals separated there are sent to the incoming call control circuits 6A and 6B and the D channel signal transfer control circuit 5A. , 5B, the contention control circuit 9 performs contention control, and then the D channel signal transfer control circuit 4 on the network side is multiplexed with the B channel by the layer 1 # end circuit 1 and sent to the network side interface 100. It's about to happen.

As shown in FIG. 2, the feature of the present invention is that, as a means for setting the priority order of incoming call responses, input set-up messages are collated and pre-written according to the priority order of the messages. A verification circuit 16A (16B) that sends out a set count value, a counter 26A (26B) that sends out a "contact" signal after counting each count value according to the settings of this verification circuit 16A (16B), and this It includes a connection transmission delay circuit 36A (36B) which manually transmits a connection response indicating that the call has arrived at the called party. That is, the incoming call control circuit 6A (6B) in FIG.
A verification circuit 16A (16B) that verifies the set-up message in the D channel signal 105 shown in the figure, and a counter 26A that starts counting in response to a command from this verification circuit.
(26B) and a transmission delay circuit 36A (36B) that inputs the "close" signal of this counter.

Next, we will explain the operation and functions of each part. As for the load value of the counter 26A in FIG. 2, for example, a sales manager sitting near the terminal manually sets the desired delay time for each call other than an emergency call from a customer. do. When a set-up message is manually input from the network side using the D value signal 105, the verification circuit 16A verifies this and
If this set-up message is not an emergency call from a customer, the counter 26A is loaded with an initial value according to the counter initial value signal 132 manually inputted from the outside, and the start of this counting is instructed (signal 134) c counter 26
The count end signal 135 of A is sent to the connection transmission delay circuit 36.
Manpower is provided by A. As a result, the connection transmission delay circuit 36A sends the connection message to the network side via the D channel signal 106 when both the response instruction from the host device of the terminal ink face 121 and the count end signal 135 from the counter 36A are received. Send. By changing the call arrival time in this manner, priority control is performed at the called terminal.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to realize an ISDN terminal multiplexing adapter in which priority control of incoming calls can be performed at each terminal interface depending on the call content of the calling destination.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is a detailed diagram of the incoming call control circuit of the above embodiment. ■... Layer 1 termination circuit on the network side, 2A, 2B... Layer 1# end circuit on the terminal side, 3... B channel switching circuit, 4... D channel signal transfer control circuit on the network side, 5A,
5B...D channel signal transfer control circuit on the terminal side, 6A
, 6B... Incoming call control circuit, 7... D channel signal monitor circuit, 8... B channel switching control circuit, 9...
Contention control circuit, 12...layer 1 activation circuit, 16A
, 16B... Set amplifier mensage verification circuit, 2
6A, 26B...Counter, 36A, 36B...Connection transmission delay circuit, 100...Network side interface,
101.1.07.110...B1 channel, 10
2.108.111...B2 channel, 103.10
9.112...D channel, 104.123.124
...Layer 1 control signal, 105.106...D channel signal, 121.122...Terminal interface,
132.133... Counter initial value signal corresponding to the delay time, 134... Signal indicating that the set-up message has been verified, 135... Callan) Q% completed signal patent applicant NEC Corporation. Agent Patent Attorney Nao Ide Takazane Case Shoulder Mass Control Mouth Route 0 Misaki Glaze 2 Kuchi

Claims (1)

[Claims] 1. A transmission control circuit (4) that controls the transfer of the D channel signal from the network side interface; and a command from the transfer control circuit to cause the D channel signal to arrive at each connected terminal interface. In an ISDN terminal multiplexing adapter that is equipped with a plurality of incoming call control circuits (6A, 6B) and is placed between a network side interface and a plurality of terminal interfaces, each of the above incoming call control circuits has a priority order of incoming call response. and means for delaying a response to an incoming call according to the setting of the means.
N terminal multiplexing adapter.