KR940007916B1 - Isdn device - Google Patents

Abstract

The devcie connects Private Automatic Branch Exchange to ISDN exchanger, and supports an ISDN service to users of ISDN PABX. The device includes a time switch means (12) which transfers B channel, a Private Automatic line connection means (11), a D channel control means (13) which transfers a D channel information of HDLC frame structure, a S-bus connection means (14), a P-bus connection menas (15), a man-machine connection means (16), a clock supply means (17) which generates an internal PCM clock, and a processor control means (19) which executes a level 2 protocol with interrupt and polling methods.

Description

ISDN primary group speed subscriber device

1 is a block diagram of an ISMP to which the present invention is applied.

2 is a block diagram of an ISDN primary group speed subscriber apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

1: primary group speed subscriber board 2: central control processor board

3: ISMP 4: ISDN subscriber upper control unit

5: PCM concentrator 6: packet processing unit

7: ISDN private exchange device 11: primary group speed line connection

12: time switch 13: D channel control unit

14: S-bus connection 15: P-bus connection

16: man machine connection 17: clock generator

18: status display unit 19: processor control unit

The present invention is a component of a primary group speed access function according to CCITT I.431 in an ISDN subscriber module group (hereinafter referred to as 'ISMP') that realizes the integrated service digital network (ISDN) function of an electronic switching system. An ISDN primary group speed subscriber device for connecting a primary group speed access terminal such as an ISDN Private Automatic Branch Exchange (PABX) to an ISDN exchange.

CCITT recommends the basic speed interface specification based on 2B + D and the primary group speed interface specification of 23B + D or 30B + D for the ISDN subscriber interface.

Accordingly, an object of the present invention is to provide an ISDN primary group speed subscriber apparatus that enables a primary group speed terminal such as an ISDN PABX to be connected to an ISDN exchanger using a primary group transmission line of T1 or E1.

In order to achieve the above object, the present invention provides an ISDN primary group speed subscriber apparatus for connecting a primary group speed access terminal to an ISDN exchange, wherein the BM channel is rearranged by rearranging the PCM bus type to connect the internal PCM bus to the PCM concentrator. Time group means for transparent transmission, primary group speed line connecting means for connecting according to the primary group speed transmission method of T1 or E1, converting for internal PCM bus, and detecting and inserting maintenance information for the line, the primary group speed line D channel control means connected to the access means for transmitting the D channel information of the HDLC frame structure, S-bus access means for transmitting the CPB and signal processing information through the S-bus, packet processing unit through the P-bus of the D channel P-bus access means for transmitting packet information, indicating the operating status of ISDN primary group speed subscriber device and using RS232C asynchronous transmission method. Man machine connection means for displaying the operation status of the processor and the peripheral device and inputting a new command, and connected to the time switch means to detect and operate the ISDN primary group speed subscriber device to operate the master of the private switching device. Clock generating means for supplying a PCM clock, said time switch means, primary group speed line connecting means, D channel control means, S-bus connecting means, D-bus connecting means, man machine connecting means, clock generating means, and status display A processor control means connected to the means for initiating said means, extracting and transmitting information from said means with interrupts and polling, and performing Layer 2 protocols.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a configuration diagram of an ISMP to which the present invention is applied, where 1 is a primary group speed subscriber board (hereinafter referred to as 'PASB'), 2 is a central control processor board (CPB), 3 is ISMP, and 4 is an ISDN subscriber upper controller ( 5 denotes a PCM concentrator (hereinafter referred to as DLC), 6 denotes a packet processing unit, and 7 denotes an ISDN private switching apparatus (hereinafter referred to as ISDN PABX).

The PASB 1 according to the present invention accesses an ISDN primary group speed terminal according to CCITT I.431 and performs OSI Layer 2 by a processor according to the CCITT Recommendation I.440 series protocol, and performs a D-channel through an S-bus. Transmits the signal processing information to the CPB (2), transparently transmits the B channel information to the DLC (5) through the PCM high-wave, and transmits the D channel packet information to the packet processing unit (6) through the P-bus Have The CPB 2 performs a layer 3 function according to the CCITT I.450 series protocol, and the PASB 1 transmits D channel signal related information through the S-bus and the ISLP 4 through the B-bus. It has the characteristics as a master of the PASB 1.

The ISMP 3 accommodates the PASB 1 and the CPB 2 according to the present invention and connects signal lines to the PASB 1 and CPB 2, the ISLP 4, the DLC 5, and the packet processor. 7) and a terminal for connecting the signal lines associated with each other.

The ISLP 4 is connected to the CPB 2 via the B-bus, has higher processor characteristics of the various ISMPs 3, and transmits signal related information to the ISLP higher processor 4 through the T-bus.

The DLC 5 has a function of transmitting a B channel of the PASB 1 to a switch of an exchange by a PCM highway of 32 timeslots. The packet processing unit 6 transmits the D channel packet information of the PASB 1 through the P-bus, and the ISDN PABX 7 connects to the PASB 1 of the exchange via the V6 interface and uses the D channel to access the CCITT. Transmit signal related information according to protocol.

2 is a configuration diagram of an ISDN primary group speed subscriber apparatus according to the present invention, 11 is a primary group speed line connection, 12 is a time switch, 13 is a D channel control unit, 14 is an S-bus connection, 15 is a P-bus connection, 16 denotes a man machine connection unit, 17 a clock generator, 18 a status display unit, and 19 a processor controller.

As shown in FIG. 2, the PASB 1 according to the present invention includes a primary group speed connection unit 11, a time switch 12, a D-channel control unit 13, an S-bus connection unit 14, and a P-bus connection unit. (15), a man machine connection unit 16, a clock generation unit 17, a status display unit 18, and a processor control unit 19.

The primary group speed line connection unit 11 is connected to the time switch 12, the D channel control unit 13, the clock generation unit 17, and the processor control unit 19, and the primary group speed transmission method of T1 or E1. It is connected according to the internal PCM bus, and has the function of detecting and inserting maintenance information for the primary group line under the control of the processor control unit 19.

The time switch 12 is implemented by Siemens PEB2055, and is connected to the primary group speed line connection unit 11 and the processor control unit 19, and rearranges the PCM bus form to connect the internal PCM bus with the DLC. Transmit B channel transparently.

The D channel control unit 13 is implemented as a PEB2075 (IDEC) VLSI device manufactured by Siemens, and is connected to the primary group speed connection unit 11 and the processor control unit 19, and the D channel information of the HDLC frame structure by an internal FIFO. And transmits information between the D-channel controller and the S-bus and P-bus connection under the control of the processor.

The S-bus connection unit 14 is connected to the processor control unit 19 and is composed of DPRAM and transmits signal processing information and the CPB through the S-bus which is a parallel bus.

The P-bus connection unit 5 is connected to the processor control unit 19 and transmits packet information of the D channel to the packet processing unit through the P-bus which is a serial bus.

The man machine connection unit 16 is connected to the processor control unit 19 and displays the operation state of the PASB, and performs functions such as detailed status monitor and new command input of the processor and peripheral devices by RS232C asynchronous transmission.

The clock generator 17 is composed of an oscillator and a TTL element, and is connected to the processor controller 19 to detect an optical synchronizer to operate the PASB as a master of the ISDN PABX, and supply an internal PCM clock to the time switch 12. Has the function for.

The status display unit 18 is composed of an LED and a TTL element and connected to the processor control unit 19 to communicate with the CPB, communicate with the packet processing unit, synchronizer clock state with respect to the PCM clock, and primary group speed lines. It has the function to display the status of maintenance for.

The processor control unit 19 includes a primary speed line connection unit 11, a time switch 12, a D channel control unit 13, an S-bus connection unit 14, a P-bus connection unit 15, and a man machine connection unit 16. ), Which is composed of a processor, a ROM, a RAM, and a peripheral device, initializes each functional unit, extracts and transmits the information of each functional unit by interrupt or polling, and the CCITT Recommendation I.440 series. According to the layer 2 protocol.

The present invention configured and operated as described above enables a primary group speed terminal such as an ISDN PABX to be connected to an all-electronic exchange using a primary group speed transmission line of the conventional T1 or E1, and an ISDN PABX, etc. connected to the all-electronic exchange. There is an application effect that can provide ISDN service to users of.

Claims (2)

An ISDN primary group speed subscriber apparatus for connecting a primary group speed access terminal to an ISDN switch, comprising: In order to connect the internal PCM bus to the PCM concentrator, the PCM bus is rearranged and connected according to the primary group speed transmission method of T1 or E1 for time switch means 12 for transparent transmission of the B channel, to suit the internal PCM bus. A first group speed line connecting means 11 for converting and detecting and inserting maintenance information about a line, and connected to the first group speed line connecting means 11 to convert D channel information of a high level data link control (HDLC) frame structure. D-channel control means 13 for transmitting, S-bus connecting means 14 for transmitting the CPB and signal processing information through the S-bus, and P- for transmitting packet information of the D-channel to the packet processor via the P-bus. Bus connection means 15, a man machine connection means 16 for displaying an operating state of an ISDN primary group speed subscriber device, an operating state of a processor and a peripheral device by RS232C asynchronous transmission, and inputting a new command; Clock generation means (17) connected to the time switch means (12) for detecting the manipulator to supply the internal PCM clock so that the ISDN primary group speed subscriber device can operate the master of the private switching device, and the time switch means (12), primary group speed line connecting means (11), D channel control means (13), S-bus connecting means (14), D-bus connecting means (15), man machine connecting means (16), and clock generation Means for controlling processor 19 connected to means 17 and status indicator means 18 for initializing each means, extracting and transmitting information from each means with interrupts and polling, and performing layer 2 protocols. An ISDN primary group speed subscriber device. 2. A status display as claimed in claim 1, which is connected to said processor processing means (19) to display a communication state with said CPB and packet processing unit, a network synchronizer clock state with respect to a PCM clock, and a maintenance state for a primary group speed line. ISDN primary group speed subscriber apparatus, characterized in that it further comprises means (18).