JPH02283194A - Private branch electronic exchange - Google Patents

Abstract

PURPOSE:To attain line exchange and packet exchange by providing a packet handler and a packet exchange switch, identifying whether or not a call from an ISDN and a terminal equipment requires line exchange or packet exchange and processing the call. CONSTITUTION:A primary group interface trunk 11 receives a signal from a Dch (one signal channel) from an ISDN network once and identifies whether the packet is a signal packet or a data packet by an identification code. In the case of the signal packet, a control section 18 executes call control. In the case of the data packet, the packet data is sent to a packet handler 15 via a packet exchange switch 18 to confirm an opposite address. when an incoming terminal equipment is accommodated in a same ISDN port module 10, the call is transferred to an ISDN terminal equipment 51 via an ISDN line circuit 13 and the switch 18 again. A Dch packet from a basic interface trunk 12 and a terminal equipment 51 is processed by the trunk 12 and the circuit 13 similarly to that in the trunk 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is applied to an ISDN private branch exchange. In particular, it relates to a switching system that enables both line switching and packet switching to enable connection with ISDN.

〔overview〕

In a private electronic branch exchange, the present invention provides an ISDN boat module for circuit switching with a get handler and a switch for packet switching.
By identifying and processing whether calls from DNs and terminals are circuit-switched or packet-switched, circuit-switching and packet-switching are made possible.

[Conventional technology]

Conventionally, before the advent of ISDN, private electronic branch exchanges were constructed independently of circuit switching systems and packet switching systems.

[Problem that the invention seeks to solve]

In such conventional private electronic branch exchanges, the line switching system for the circuit switching system and the packet switching system for the packet switching system are each provided as independent systems. However, I.S.D.
With the advent of N, circuit switching and packet switching are provided on the subscriber interface to the public SDN, and as a result, circuit switching means and packet switching means are provided in the same exchange. Despite the need to do so, it had the drawback of only having one function.

The present invention solves the above-mentioned drawbacks and aims to provide a private electronic branch exchange capable of circuit switching and packet switching.

[Means for solving problems]

The present invention provides a main time division switch interface connected to a main time division switch, a primary group interface trunk and a basic interface trunk that monitor and control communications with the ISDN, and an ISDN interface that monitors and controls communications with terminals.
A private electronic branch exchange equipped with an ISDN boat module including a line circuit, a control unit that performs connection control, the main time division switch interface, the two interface trunks, an ISDN line circuit, and a line switching switch connected to the control unit. In the ISDN port module, the ISDN port module includes a packet handler that controls packet switching, the packet handler, the two interface trunks, the ISDN line circuit, and a packet switching switch connected to the control unit, The two interface trunks and the ISDN line circuit are characterized in that they include means for identifying the switching method of each call and connecting to the circuit switching switch or the packet switching switch.

[Effect]

A packet handler for controlling packet switching, and a packet switching switch for connecting this packet handler, a next group interface trunk, a basic interface trunk, an ISDN line circuit, and a control section are provided. The above two interfaces identify the switching method of a call from ISDN, and the ISDN line circuit identifies the switching method of a call from a terminal, and connects the call to a circuit switching switch or a packet switching switch. The above operations enable circuit switching and packet switching.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. The figure is a block diagram of a private electronic branch exchange according to an embodiment of the present invention. In the figure, the private electronic branch exchange has main time division switch 3.
a main time division switch interface 14 connected to 0;
A primary group interface trunk 11 and a basic interface trunk 12 that monitor and control communication with ISDN.
, an rSDN line circuit 13 that monitors and controls communications with terminals, a control unit 18 that performs connection control, a main time division switch interface 14, the above two interface trunks, an ISDN line circuit 13, and a control unit 18.
an ISDN port module 10 including a line-switching switch 17 connected to the main time-sharing switch 30; and a telephone interface 2 connected to the main time-sharing switch 30.
1 and a boat interface module 20 including a trunk line interface 22. - The next group interface trunk 11 and the basic interface trunk have network terminal equipment 41. ．． ISDN is connected via 41□. Further, an existing terminal 51 is connected to the ISDN line circuit 13 via a terminal adapter 52.
Further, an ISDN terminal 51□ is connected.

Here, the feature of the present invention is that the ISDN port module 10 includes a packet handler 15 that controls packet switching, this packet handler 15, the above two interface trunks, an ISDN line circuit 13, and a control section 18. The two interface trunk and ISDN line circuits 13 identify the switching method of each call and switch to the line switching switch 17 or the packet switching switch 16. It is characterized in that it includes means for connecting.

The operation of the private electronic branch exchange having such a configuration will be explained. In the figure, the basic interface is (2B+D), two communication channels (hereinafter referred to as sch) and one signal channel (hereinafter referred to as I)ch. ). Moreover, the -order group interface is (23B+D>
As a result, there are 23 Bchs and one glue. It is established from h. I) channel can also carry packet data in addition to signals.

- The next group interface trunk 11 once receives the DCh from the ISDN network, and identifies whether it is a signal packet or a data packet using an identification code. If it is a signal packet, the control unit 18 executes call control. If it is a data packet, the packet data is packet 7) Replacement switch 16
The packet is sent to the packet handler 15 via the packet handler 15, the destination address is confirmed, and if the receiving terminal is accommodated in the same ISDN boat module 10, the packet is sent via the ISDN line circuit 13 via the packet exchange switch 16 again. I
It is transferred to the SDN terminal 51. The I)ch packets from the basic interface trunk 12 and the ISDN terminal 51 are sent to the basic interface trunk 12 and the I)ch packet, respectively.
It is processed in the SDN line circuit 13 in the same way as the primary group interface trunk 11.

Next, the case of E3ch will be explained. E3ch can also be used for both circuit switching and packet switching. primary group interface trunk 11 in case of circuit switching;
The basic interface trunk 12 and the ISDN line circuit 13 are connected to the main time division switch interface 14 via the circuit switching switch 17, and the main time division switch 3o further includes a port interface module 20 or a port interface module 20 in which a called terminal is accommodated. Connected to ISDN boat module 1o.

In the case of E3ch packets, for example - B from next group interface trunk II. If the called terminal is fixed at the time of the h packet, it is connected to the called terminal by the line switching switch 17, and then end-to-end packet communication is performed.

Also - B from the next group interface trunk 11. Bch when the called terminal is different for each packet in h packet.
The packet 7) passes through the packet switching switch 16 and is once terminated at the packet handler 15, where the called address is identified and sent through the packet switching switch 15 to the called terminal.

〔Effect of the invention〕

As explained above, the present invention has the excellent effect of being able to perform circuit switching and packet switching, and connecting to ISDN.

[Brief explanation of drawings]

The figure is a block diagram of a private branch exchange according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 10... ISDN boat module, 11... -Next group interface trunk, 12... Basic interface trunk, 13... ISDN line circuit, 14...
...Main time division switch interface, 15...Packet handler, 16...Packet exchange switch, 1
7 River line exchange switch, 18...control unit, 2o...
・Boat interface Moshu Nobe 21...Telephone interface, 22...Trunk line interface, 3o...Main time division switch, 4L, 41□...
Network termination device, 51. ...Existing terminal, 51°...I
SDN terminal, 52...Terminal adapter.

Claims (1)

[Claims] 1. A main time division switch interface connected to a main time division switch, a primary group interface trunk and a basic interface trunk that monitor and control communications with the ISDN, and an ISDN that monitors and controls communications with terminals. In a private electronic branch exchange equipped with a line circuit, a control unit that performs connection control, and an ISDN port module including the main time division switch interface, the two interface trunks, an ISDN line circuit, and a line switching switch connected to the control unit. The ISDN port module includes a packet handler that controls packet switching, a packet switching switch connected to the packet handler, the two interface trunks, the ISDN line circuit, and the control unit, and the two interfaces A private electronic branch exchange characterized in that the trunk and ISDN line circuits include means for identifying the switching method of each call and connecting it to the circuit switching switch or the packet switching switch.