JPH0514954A - Electronic exchange system and signal delivery and reception method - Google Patents

Abstract

PURPOSE:To make it possible to dispersedly arrange a line IF in the distance and to increase line/trunk circuit regardless of the line IF within a main body by performing a packet transmission from a central control part by defining a card address given to the interface (IF) card of each line as a destination address. CONSTITUTION:A CPU 60-2 discriminates the card address allocated to a L/T system card 72 at a remote place by referring to the address field of a control packet and transmits the address to a communication path 60-5 through a SIO 60-3 via a bus 60-4. At this time, the CPU 60-2 recognizes the storage position of a RUT-60 by referring to an I/O port, sets a new address value which an offset value from the head of a line/trunk part 30 is subtracted from the address value of the control packet to the packet and transmits the new value to the communication path 60-5. The control packet is transmitted to a transmission line 80 by being multiplexed. The packet enters a multiplexing switch 73-6, and then it is restored to its original control packet and transmitted to a control highway 714 in a direction of a RU 70 via a M-ILSI73-1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital electronic exchange system for a premises and a signal transmitting / receiving method thereof.

[0002]

2. Description of the Related Art A digital electronic exchange (PB) for private use
X) In the system, if the communication equipment is distributed over a wide area, the line / trunk circuits are distributed, the central control unit and the central control unit are connected by a digital leased line, and the control signal and the call data are transmitted, thereby transmitting the communication network. The configuration is said to realize. In other words, the extension lines that can be accommodated in the PBX body are limited in the distance that they can be routed due to the attenuation of the line resistance, etc. Also, it is legally prohibited to construct an extension line across public roads. Therefore, in general, if one PBX manages and operates a terminal at a remote place in the same way as a terminal accommodating the PBX main unit, a digital leased line is used between the PBX main unit and the remote place. The simplest way is to connect and control the PBX control unit by allocating it to the address space of the control unit.

To do this, in the PBX, the card on which the line / trunk circuit is mounted is used by mounting it in a plurality of card mounting slots prepared in the PBX main body. A specific address is allocated, and the control card of each slot is controlled by the PBX control unit using this allocated address. Similarly, at a remote location, a plurality of slots similar to the slots in the PBX main unit are provided, and Is assigned to the address space of the PBX control unit for control. For ease of design and ease of system construction, a remote slot is often associated with a slot in the PBX main body on a one-to-one basis, and those corresponding ones are often given the same address.

Generally, in the PBX main body, P is determined by the position of the mounting slot of the card on which the line / trunk circuit is mounted.
Since the transmission speed set by the control unit of the BX main unit is determined, it is necessary to determine the accommodation position of the line / trunk circuit at a remote place in consideration of the accommodation position of the line / trunk circuit when constructing the system. . In addition, when the accommodation position of the line / trunk circuit of the PBX main unit is changed and the change affects the accommodation position of the line / trunk circuit at the remote location, the accommodation of the line / trunk circuit at the remote location is performed. I had to change the position.

More specifically, referring to FIG.
Is a private branch exchange main body (hereinafter referred to as PBX main body), and this PBX main body 100 is a central control unit 110 which is the center of control including exchange operation, and line acquisition, incoming and outgoing calls for internal and external lines, dial information and voice signals. And a line / trunk unit 120 which is an interface for transmitting and receiving data. Further, a remote unit (RU) 170, which is a unit for accommodating a line / trunk circuit, is provided at a remote location, and the PBX main unit 1 is connected via a digital dedicated line 180.
Connected with. This RU 170 is an L / T-type shelf (a rack for mounting cards that accommodates line / trunk-type cards, a mounting shelf) 171 and a plurality of L / T-type cards (units that accommodate a plurality of line / trunk circuits) Each has a slot for mounting the L / T card, and the RU control card (RUC) 150 that controls various types of RU 170 is also stored. Has been done.

Between the RU 170 and the PBX body 100 is RU 1
Dedicated digital line 18 by RUC 150 in 70 and RU interface card (RUI) 130 in PBX main body 100
Communicate via 0.

The line / trunk section 120 of the PBX main body 100
There are n card mounting slots, each of which is assigned a specific address. The cards mounted in the mounting slots can be individually controlled by this address. The configuration of the mounting slot of the RU 170 installed at a remote place is the same as the slot configuration of the line / trunk section 20 of the PBX main body 100, and the mounting slots of the line / trunk section 120 of the PBX main body 100 and the RU 170 are the same. Each of the mounting slots is associated with each other on a one-to-one basis.
When viewed from the central control unit 110 of the X main body 100, the same addresses are allocated. This allows
Even if the card is in a remote place or inside the PBX, it can be specified and managed only by the position of the mounting slot without being aware of its mounting point.

In this case, although management is easy when constructing the system, on the other hand, the mounting slots having the same address cannot be used redundantly at the remote location and the PBX body side.

For example, if it is assumed that the remote station and the PBX main unit are located at the same slot position, the same address is assigned to the line / line of the PBX main unit 1.
Of the mounting slots 23a to 23g in the trunk section 20,
L / T cards 22a to 22c are mounted on 23a to 23c, and RU
If I 30 is installed in mounting slot 23d,
In the U 170, the L / T system card cannot be accommodated in the positions of the slots 42a to 42d, which are the same slot positions as these. This is because when cards are stored in the mounting slots 42a to 42d of the L / T shelf 171 in the RU 40 at a remote place, the address indicating the storage position is the PBX main unit 10.
L / T cards 22a to 22c and RUI housed in 0
Since there is a match with 130, the presence of multiple control target cards on the same address will cause control to be impossible and control will be impossible. Therefore, the mounting slots 42a to 42d are vacant on the remote side. However, it becomes impossible to accommodate L / T cards.

Therefore, on the remote side, it can be accommodated for the first time by using the mounting slot at the same position as the empty mounting slot on the PBX main body 100. In this example, it becomes empty on the PBX main body 100 side. Installed slot
By storing the L / T card in the RU 170 by using the mounting slots 42e to 42g that are located at the same positions as 23e to 23g, the PBX main body 100 can be connected to the L / T card 100 from the central control unit 110.
It becomes possible to recognize the card by giving it the same address as when the system cards 22d to 22f are mounted.

[0011]

In a private branch exchange system such as a business office where communication terminals are spread over a wide area, when line / trunk circuits are distributed and accommodated in one PBX, a remote area is used. And PBX are connected by a digital dedicated line, and the distributed line / trunk circuits are P
Addresses are respectively allocated in the form of being allocated to the address space in the central control unit of the BX, and control can be performed from the central control unit using this address. And normally, this address is assigned to the remote location and the PBX.
Each card is provided with a plurality of slots for card mounting, a unique address is assigned to each slot, and each line / trunk circuit supplied in the form of a card is mounted in one of the slots.

To facilitate the construction, the slot at the remote location has a one-to-one correspondence with the slot of the PBX, and the same address is assigned to the corresponding slot.

Therefore, when using one of the slots having the same address, the other cannot be used.
When accommodating the line / trunk circuit in a remote place, it is necessary to be aware of the accommodating position of the line / trunk circuit of the PBX main body. That is, only the slots corresponding to the empty slots in the PBX body can be used on the remote side.

Further, when the accommodation position of the line / trunk circuit of the PBX main body is changed, if the alteration affects the accommodation position of the line / trunk circuit at the remote place, the accommodation of the line / trunk circuit at the remote place is carried out. The position must also be changed. In other words, when changing the accommodating position of the line / trunk circuit of the PBX main unit, use only the slot corresponding to an empty slot on the remote side or the slot to which an address not assigned to the remote side is assigned. Can not.

In this way, the accommodation position of the line / trunk circuit can be changed or the line / trunk circuit can be changed on the PBX main body or the remote side.
When adding a trunk circuit, slots must be selected so that addresses do not conflict with each other. In addition, generally, the transmission speed is fixed and set in advance depending on the slot position, and the accommodation position must be managed in consideration of these things. Therefore, adding a line / trunk circuit or changing the accommodation position is rather troublesome, and it is a difficult task because the PBX main body and the remote side slot are located far away from each other.

Therefore, the object of the present invention is to
When changing the accommodation position of the line / trunk circuit or adding a line / trunk circuit on the remote side,
An object of the present invention is to provide an electronic exchange system capable of accommodating a line / trunk circuit of a PBX main body without being aware of the accommodating position and a signal transfer method thereof.

[0017]

In order to achieve the above object, the present invention is configured as follows. In other words, line interface cards for connecting terminals, external lines, etc. are installed in a plurality of mounting slots in the exchange, and each mounting slot is connected to a control highway and a communication path highway, and an interface card installed in each mounting slot. The card and the central control unit exchange signals via this highway, and at the remote location, a control highway and a communication highway according to the same protocol as the control highway and the communication path highway are provided, and an interface card is installed. Prepare a plurality of mounting slots for mounting, and connect the remote side and the exchange main body side with the transmission path via the interface for transmission control mounted in each mounting slot,
In a system in which the signals to be sent and received are sent to the destination specified by packets, each line interface card is given a unique card address,
The central control unit uses the address as the destination address for packet transmission, and each line interface card has a function to receive a packet with its own destination address. -The card is configured to have the function of sending packets from the self to the central control unit by sending them out to the control highway using the time slot corresponding to its own card address. When a transmission packet from a remote place is received, the control interface obtains an address that is the source card address of the packet plus a predetermined offset value, and uses the time slot corresponding to this address to control the highway. By sending it to the central control unit, the transmission packet from the central control unit It is constructed by adding a function of transmitting to the remote side by adding the offset value, new destination address by subtracting from the destination address.

Secondly, line interface cards for connecting terminals, external lines, etc. are installed in a plurality of mounting slots in the exchange, and each mounting slot is connected to a control highway and a communication path highway. The interface card installed in the installation slot and the central control unit send and receive signals via this highway, and at a remote location, the control highway and the communication highway according to the same protocol as the control highway and the communication highway are used. In addition, a plurality of mounting slots for mounting the interface card are prepared, and the remote side and the exchange main body side are connected by a transmission line via the transmission control interfaces mounted in the mounting slots, respectively. The signal to be sent is sent each time in the system that sends it to the destination specified by the packet. A unique card address is assigned to the interface card, each card address is used as a destination address for packet transmission from the central control unit, and each card has its own destination address. In addition to receiving the packet, each line interface card sends the packet from itself to the central control unit by sending it out to the control highway using the time slot corresponding to its own card address and transmitting from a remote place. Central control by sending a predetermined offset value to the packet on the control highway on the switch side using a time slot corresponding to the address obtained in addition to the transfer source card address in the transmission control interface on the switch side To the remote place from the central control unit. A packet is sent to the destination with the offset value of the transmission control interface added to the destination address, and the destination address obtained by subtracting the offset value from this destination is used as a new destination packet at the remote control interface in the transmission control interface. I will send it to your side.

[0019]

In the above structure, the line interface cards are installed in the plurality of installation slots in the exchange, and the interface cards and the central control unit installed in the respective installation slots send signals via the control highway and the communication path highway. In addition to transmitting and receiving, a control highway and a communication path highway according to the same protocol as the above-mentioned control highway and communication path highway are provided in a remote place, and a plurality of mounting slots for mounting an interface card are prepared, The remote side and the main body of the exchange are connected by transmission lines via the transmission control interfaces mounted in the mounting slots, and the signals to be transmitted and received are sent to the destination specified by the packet.
A unique card address is assigned to each card, and each card address is used as a destination address for packet transmission from the central control unit. Let it be received when a packet with an address comes in, and also
A packet from the self to the central control unit is transmitted by sending it out to the control highway using a time slot corresponding to the card address of the self.

On the other hand, a transmission packet from a remote place to the central control unit of the exchange is once received by the transmission control interface on the side of the exchange, where a predetermined offset value is added to the transfer source card address to create a new address. And sends it out to the control highway using the corresponding timeslot. As a result, the packet from the remote side is transmitted to the central control unit. In addition, a packet is sent from the central control unit to a remote location with the offset value of the transmission control interface of the exchange main body added to the destination address, and the offset value is subtracted from this destination at the transmission control interface. The destination address thus obtained is sent to the remote side as a packet with a new destination.

[0021] In short, the present invention is a line interface
L / T type card, which is a card,
You can attach the line to multiple attachment slots on the trunk
The trunk section is provided with a control highway and a communication path highway, and exchanges signals with the central control section via these highways with the L / T card of each mounting slot, and the line / trunk on the remote side. A control highway and a communication path highway based on the same protocol as that of the section are prepared, and a plurality of mounting slots for mounting the interface card are prepared. In a system in which a signal is transmitted and received via a transmission line through an interface and is sent to a destination specified by a packet, each L / T
A unique card address is assigned to each system card, each card address is used as a destination address to perform packet transmission from the central control unit, and each card side receives a packet having its own corresponding destination address, The packet from each L / T card to the central control unit is received by sending it to the control highway using the time slot corresponding to its card address. The transmission control interface sends the data to the central control unit by sending it to the control highway using a time slot corresponding to the address added to the transfer source card address by a predetermined offset value. Packet for remote area and card in switch depending on whether minute is added to address To be able to distinguish the only packet,
Unlike the prior art in which an address is assigned to a mounting slot, it is not necessary to be aware of the position of the mounting slot, and any mounting slot can be used to easily add or change the position of an L / T card.

Moreover, the L / T card on the remote side is PB
Even if the L / T card of the X main unit and the card address are duplicated, the card address is corrected by the predetermined offset value in the interface for transmission control of the PBX main unit, so the purpose is not confused. You can exchange packets with other L / T cards.

Therefore, when the accommodation position of the line / trunk circuit is changed or the line / trunk circuit is added on the remote side or the PBX body side, the accommodation position of the line / trunk circuit of the PBX body is taken into consideration. Can be accommodated without doing.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic configuration diagram of a digital private branch exchange (PBX) system to which the present invention is applied. As shown in the figure, this system includes a PBX main unit 1, a RU 70 installed at a remote place, and a digital leased line 80 for connecting the PBX main unit 1 and the RU 70 and transmitting a signal between them. It is configured.

The PBX main body 1 is a central control unit 10 which plays a central role in the exchange operation and various controls of the system, an L / T card 32 which is an interface card for connecting a telephone terminal or a central office line, and other interfaces. It has a line / trunk portion 30 for accommodating cards and the like.

The line / trunk section 30 has a plurality of mounting slots for mounting cards, and a plurality of the above cards can be mounted by using these mounting slots. In this system, each of these mounting slots is assigned to its own I / O port, and the card mounted in the mounting slot can be managed by the I / O port number of the mounted slot.

As shown in FIG. 3, the central control unit 10 includes a main processor (MCPU) 11 and a local control unit (L).
It comprises a PU) 12, a shared memory (CM) 13, a speech path unit 20, and the like.

Of these, the MCPU 11 analyzes, judges, and gives an instruction to signals with the respective control units, and performs call processing, fault processing,
This unit controls the entire system such as maintenance and operation. In addition, LPU 12 is under the control of MCPU 11,
It is a unit that controls and diagnoses the line / trunk unit 30. The CM 13 is a memory common to the processors used for communication between the MCPU 11 and the LPU 12 via the system bus 14.

The speech path section 20 of the central control section 10 is for forming a speech path with each line / trunk section 30 which is an interface of the accommodated line, and is a time switch (TS
W), and when establishing a communication path between certain line circuits or between a certain line circuit and a certain trunk circuit, for transmission to that line circuit or trunk circuit,
By deciding a specific time slot for reception and inserting a call signal in the time slot, the call signal is given to the other party to perform the exchange operation.

The line / trunk section 30 of the PBX body 1 is composed of a plurality of L / T cards (line / trunk cards, that is, a board on which a line / trunk circuit is mounted) 32. The L / T card 32 is a unit configured by mounting a plurality of line circuits / trunk circuits on a single board. Line circuits are interfaces between corresponding extensions and PBXs, and trunk circuits are interfaces between corresponding station lines and PBXs. Line capture, incoming call detection, loop dial pulse transmission, 2-wire to 4-wire conversion , Encoding / decoding, etc. The L / T card 32 has a DS which is a line circuit system.
TI, BSTI, and COTI, which is a trunk circuit system
Etc.

The DSTI, which is an interface card of the line circuit system, is a card for controlling transmission / reception of various signals to / from a terminal such as a digital telephone or a reception desk / relay stand. The BSTI, which is an interface card of the line circuit system, is a card that controls the loop information of the standard telephone, controls the reception of counting selection signals, the transmission of calling signals, and the like. The COTI, which is an interface card of the trunk circuit system, is an interface with an analog office line, and monitors incoming signals from the analog central office switch, controls such as sending dial pulse / push button selection signals, and voice signals. It is a card for giving and receiving.

L in the central control unit 10 in the PBX main body 1
The PU 12 and the L / T card 32 housed in the PBX main body 1 are connected via the control highway 40 in the PBX main body 1, and the control highway 40 exchanges control signals. ing. Further, the call path unit 20 in the central control unit 10 and the L / T system card 32 are connected via the call path highway 50, and the call data can be transmitted by the call path highway 50. ing.

Next, the communication system of the L / T card 32, the LPU 12 and the communication path unit 20 will be described. The control highway 40 is a full-duplex serial bus with a basic transmission rate of 2.048 Mbps. L
The communication between the / T card 32 and the LPU 12 is performed by the control highway 40 in a multiplexing manner. A unit having an interface function for transmitting / receiving a signal to / from the control highway 40 is called an ILSI.

Signal transmission / reception interface unit ILS
I is the main interface unit MI
There is an LSI 12-1 and an S-ILSI 32-1 that is a sub interface unit, and one highway has an M-IL.
Up to 1 SI and 32 S-ILSIs can be accommodated. M-ILSI 12-1 is on LPU 12 and SI
The LSI 32-1 is on the L / T card 32.

A unique address is assigned to each L / T card 32 (hereinafter, this address is called a card address), and the assigned address is the S-ILSI 32 on the control highway 40. It is used as the address of -1.

The transmission control system of the control highway 40 is 4 m
It is divided into "32" time slots in s cycles, and a fixed-length control packet having a header including an address field having information of a destination address and a source address is transmitted and received in each time slot.

The transmission direction of the control packet on the control highway 40 includes an up direction and a down direction. Further, the downlink direction is a direction in which a control packet is transmitted from the M-LSI to one or more S-LSIs. Control packets are transmitted using arbitrary time slots.

When a control packet is sent from the M-LSI to one S-LSI, the destination S-LS is set to the destination address in the address field of the control packet.
Write the card address of I and specify the other party.
When sending a control packet to the L / T card 32 of a specific type in a broadcast manner, the card type (BSTI, DSTI, COT) is set in the destination address of the address field.
I, other) is set. Each S-LS
I analyzes the address field and receives and fetches only the control packet sent to itself from the destination address.

The upstream direction is a direction in which a control packet is transmitted from one S-LSI to the M-LSI 12-1 of the LPU 12, and the control packet in this case is self-transmitted from the transmission source S-LSI. Is transmitted on the control highway 40 using the time slot corresponding to the card address of. The M-LSI 12-1 receives a control packet having no conflict between the time slot and the address field information. According to the above method, M-LSI 12-1 and multiple S-LS
The I 32-1 can face each other via the control highway 40 and can exchange control packets.

The communication between the L / T system card 32 and the communication path unit 20 is performed by transmitting and receiving PCM-encoded communication data through the time-division multiplexed communication path highway 50. Specifically, each L / T card 32 transmits / receives call data using a time slot corresponding to its own card address on the call path highway 50.

Next, a connection system between the remote L / T card 72 and the PBX main body 1 will be described with reference to FIG. FIG. 1 is a block diagram showing the details of this system, and shows the details of the accommodation unit in the RU 70 installed in a remote place and the relationship between each element of the PBX main body 1.

As shown in the figure, the system is a PBX main unit 1
Central control part 10, line / trunk part
30, RUI 60, and R, the remote component
U 70, line / trunk (L / T) card 72, RU
Transmission line 80 that connects the C73 and the remote side to the PBX main unit 1 side
Etc.

The PBX main body 1 has a line / trunk portion 30 and has a plurality of mounting slots for card mounting, and the L / T card 32 directly accommodated in the PBX main body should be inserted here. Thus, the control highway 40 and the communication path highway 50 are connected as internal communication paths. Also,
Each mounting slot is assigned to a unique I / O port and can be managed by the I / O port number.

The RUI 60 in the PBX body 1 is the RUI 60
CPU 60-2, S-ILSI 32-1, S for controlling the whole
It consists of IO 60-3, multiplex switch 60-6, etc.,
It constitutes the line / trunk portion 30 of the PBX main body 1.
The S-ILSI 60-1 is connected to the control highway 40 and sends and receives control packets. This S-ILSI 60-1 is L
Unlike the S-ILSI 32-1 on the / T card 32, all control packets on the control highway 40 are received regardless of the contents of the destination address in the address field.

The CPU 60-2 is the S-ILSI 60-
1 identifies a remote control packet from the contents of the destination address in the address field of the received control packet, and subtracts the specified offset value from the destination address value in the address field to obtain a new value. A control packet from a remote place received from the transmission line 80 via the multiplexing switch 60-6. The control highway 74 has the same mechanism as the control highway 40 on the PBX main unit 1 side, and uses the time slot corresponding to the card address of the transmission source in the upstream direction. The new address obtained by adding the value is used as the source card address, and the S-ILSI 60-
It has the function to give to 1.

Further, the S-ILSI 60-1 has a function of sending the control packet from the remote side to the control highway 40 by utilizing the time slot corresponding to the source card address thus changed.

The RUI 60 is an interface for transmission / reception control and serves as a card. The RUI 60 is inserted and mounted in a card mounting slot in the line / trunk section 30 of the PBX body 1. The RUI 60 has a function as an interface for transmitting / receiving a signal to / from the control highway 40 and the communication path highway 50, and transmits the signal via the transmission path 80 to the RU 70 in the RU 70 on the remote side.
It transmits and receives to and from C 73 via the transmission line 80.

The LPU 12 of the central control unit 10 sends the address of the control packet to the card on the remote side.
Specify the destination's address as the field's card address value plus a specified offset value according to the I / O port number assigned to the RUI 60 installation slot that is the connection interface with the remote location. Have a function.

A remote unit (R
U) 70 is composed of an RUC 73, an L / T card 72, a control highway 74, and a communication path highway 75, and has a plurality of card mounting slots for accommodating the L / T card 72 and the RUC 73. is doing.

Among these, the RUC (remote unit controller) 73 provides the control highway 74 and the communication path highway 75, and at the same time, the RUC on the PBX main unit 1 side.
It is a module that sends and receives control signals and call data to and from the UI 60 via the transmission path 80. In addition, L / of RU 70
A unique card address in the control highway 40 of the PBX main body 1 is also assigned to the T-system card 72.

The serial input / output unit (SIO) 60-3 is an input / output interface for converting parallel data into serial data and transmitting the serial data, and receiving the received serial data as parallel data. It supports Layers 1 and 2 of 25 protocols and sends and receives signals to and from the communication path 60-5.

The multiplexing switch 60-6 provided in the RUI 60 of the PBX body 1 is a communication path 60-5 and a communication path highway.
50 is multiplexed and connected to the transmission line 80.
It has a function of decomposing the multiplexed signal sent from the transmission path 80, dividing it into control packets and call signals, and giving them to the communication path 60-5 and the call path highway 50. The transmission line 80 connecting the PBX main unit 1 side and the RU 70 at a remote place uses a super digital dedicated line or a transmission line in a private premises.

In addition, the RUC 7 in the RU 70 in the remote place
3 is a CPU 73-2, M- that controls the entire RUC 73.
It is composed of an ILSI (main interface unit for signal transmission / reception) 73-1, an SIO (serial input / output unit) 73-3, and a multiplexing switch 73-6. Of these, the M-ILSI 73-1 sends and receives control packets to and from the control highway 74 in the RU 70 on the remote side.

SIO 73-3 is the SIO 6 on the PBX main unit 1 side.
0-3 is a unit similar to that for the communication path 73-5 connected to the multiplexing switch 73-6. Signals are transmitted and received by the 25 protocol.

The multiplexing switch 73-6 multiplexes the communication path 73-5 and the communication path highway 75 and connects them to the transmission path 80. Further, the multiplexing switch 73-6 fixedly allocates 128 kbps on the transmission line 80 for data transmission on the control highways 40 and 74.

Next, a control signal transmission / reception system between the LPU (local control unit) 12 of the PBX main unit 1 and the L / T card 72 on the remote side in the present system having such a configuration will be described. First, the LPU 12, which is a processor for local control provided on the PBX main unit 1 side, controls the highway.
Control packet sent to 40 L / T card 72 at remote location
Will be explained until the reception.

PBX for the L / T card 72 at a remote place
When the control information is sent from the main body 1, the control highway 40 in the downward direction from the LPU 12 in the form of a fixed-length control packet having a header in which the card address assigned to the card 72 is added to the address field as the destination address. By sending it to. That is, MCPU11
Under the control of the L / T card 72, if the LPU 12 is instructed to output necessary control information to the L / T card 72, the card 72
The LPU 12 generates a control packet having a header including a destination address field corresponding to the above and control information, and sends the control packet to the downstream control highway 40.

On the other hand, the S-ILSI 60-1 in the RUI 60 of the PBX main body 1 receives the control packet sent by the LPU 12 on the downstream control highway 40 regardless of the contents of the destination address field. is doing. And the CPU 60-2 in the RUI 60 is the S-ILS
Of the control packets received by the I 60-1, only the data related to the line / trunk card 72 at the remote location is transferred to the bus 60.
It transfers to SIO 60-3 via -4, and SIO 60-3 sends this out to the communication path 60-5.

In other words, the CPU 60-2 refers to the address field of the control packet and refers to the card address assigned to the L / T card 72 at the remote location, or P
A control packet having a card address other than the allocation card address of the L / T card 32 contained in the BX main unit 1 is identified, and this control packet is transferred to the SIO 60-3 via the bus 60-4. The SIO 60-3 uses this as a communication path.
Control to send to 60-5.

At this time, the CPU 60-2 knows the accommodation position of the RUI 60 by referring to the I / O port, and calculates the offset position from the head of the line / trunk section 30. Then, the CPU 60-2 sets a value obtained by subtracting this value from the address value of the control packet as a new address in the packet and sends it to the communication path 60-5. Thus the communication path
The control packet sent to 60-5 is multiplexed by the multiplexing switch 60-6 and sent to the transmission line 80.

The control packet on the transmission path 80 enters the multiplexing switch 73-6 of the RUC 73 on the RU 70 side, is restored to the original control packet and is sent to the communication path 73-5, and the SIO 73-
Received by 3. The CPU 73-2 in the RUC 73 sends the control packet received by the SIO 73-3 to the M-ILSI 7
Then, the M-ILSI 73-1 sends the control packet to the downstream control highway 74.

As a result, the central control unit 10 on the PBX body 1 side
The control packet sent from the M-ILSI 12-1 in the LPU 12 to the control highway 40 in the down direction is sent to the control highway 74 in the down direction of the unit RU 70 on the remote side as it is. .

L / T card 72 and PBX main unit 1 in a remote place
Each L / T card 32 inside has a unique address set on the control highway 40, but the addition of the L / T card 72 at a remote location is installed in the installation slot in the line / trunk section 30. RUI for connection with the established transmission line 80
Since it takes the form of 60, the RUI60 concerned
The I / O port number in the installed slot of is used as the offset value of the address, and this RUI 60
The address of the control packet sent to the card at the remote place connected via the RUI 60 is used as the destination address in the sense that this RUI 60 is interposed. L / T within 1
It is possible to distinguish even if the same card address is set for the system card.

Then, in the RUI 60, the above offset value is subtracted from the address of the control packet to return to the card address assigned to the remote card,
A remote card can receive a control packet corresponding to its own card address.

As a result, the RU for connecting to the transmission line 80 when accommodating the L / T card 72 at a remote location
The mounting slot position for mounting the I 60 is line /
Any of the empty mounting slots of the trunk section 30 can be used, and the allocation card address of the L / T card 72 at the remote location is the allocation card address of the L / T card 32 of the PBX main unit 1 side. There is no problem even if they overlap.

That is, this is a system for identifying the other party by using the card address given to the card. For remote locations, the L attached to the mounting slot of the line / trunk section 30 is used to temporarily add an offset value to the address. Since the / T system card 32 and the L / T system card 72 installed in the installation slot of the RU 70 on the remote side can be distinguished from each other,
It is not necessary to be aware of the mounting slot position to be used and the assigned card address of the card in the remote place and the PBX body.

As described above, the RUI 60 for connection with the transmission path 80 mounted in the mounting slot in the line / trunk section 30 is provided so as not to consider the influence in the PBX main body 1.
By using the I / O port number in the mounting slot as an offset value and subtracting the offset value from the address of the remote side L / T card 72, the control highway 40 on the PBX main unit 1 side is not congested, It is possible to distinguish each card.

RU 7 which is a unit on the remote side
The L / T card 72 housed in 0 is assigned a unique card address in the control highway 40,
Since the control packet to which the card address with the offset value subtracted is added from I 60, it is possible to use the same configuration as the L / T system card 32 used on the PBX main unit 1 side, and therefore L / T Since the T card 72 has a function of fetching a control packet having a destination address corresponding to the card address assigned to itself,
It is possible to receive a control packet for itself from the LPU 12 in the central control unit 10 on the BX main body side.

Next, RU 70 which is a unit on the remote side
The control packet sent to the control highway 74 from the L / T card 72 housed in the
The process up to the reception by the 10 LPUs 12 will be described.

When control information is sent from the L / T card 72 to the PBX main unit 1 side, the S-IL of the L / T card 72 is sent.
A control packet containing the control information is created from SI 72-1 and sent out in the up direction of the control highway 74 using the time slot corresponding to the card address of the L / T card 72. Control Highway 74 from S-ILSI 72-1
The control packet sent to the RUC 73 is the M-ILS in the RUC 73.
I 73-1, the CPU 73-2 in the RUC 73 transfers the control packet received by the M-ILSI 73-1 to the SIO 73-3 via the bus 73-4, and the SIO 73-3 receives the control packet.
73-3 sends this to the communication path 73-5.

In this way, the control packet transmitted to the communication path 73-5 of the RUC 73 in the unit RU 70 on the remote side is the multiplexing switch 73-6 in the RUC 73.
Are multiplexed and sent out to the transmission line 80 and sent to the PBX body side.

Then, the PBX is multiplexed on the transmission line 80.
The control packet sent from the RU 70 side to the main body side is the R packet in the line / trunk section 30 on the PBX main body 1 side.
It enters the multiplexing switch 60-6 in the UI 60, is decomposed here and is returned to the original control packet, is sent to the communication path 60-5, and is received by the SIO 60-3. CPU in RUI 60
60-2 sends the control packet received by this SIO 60-3 to S
-Transfer to ILSI 60-1.

At this time, the CPU 60-2 knows the accommodation position of the RUI 60 by referring to the I / O port, calculates the offset position from the head of the line / trunk section 30, and calculates this value (offset value). To the card address determined by the time slot position of the reception control packet,
Ask for a new address. The S-ILSI 60-1 uses the time slot corresponding to the obtained address to send the reception control packet to the control highway 40 in the PBX main unit 1.
In the upstream direction.

As a result, the packet information sent from the L / T card 72-1 housed in the remote side RU 70 to the control highway 74 in the RU 70 is the control highway 40 in the PBX body. In addition, the data is transmitted on the time slot corresponding to each card. Therefore, the LPU 12 in the central control unit 10 in the PBX can receive the control packet from the remote L / T card 72 by recognizing which card it is from.

By the above method, the central control unit in the PBX is
The LPU 12 in 10 connects the L / T card 72 housed in the remote RU 70 directly to the position of each card address in the control highway 40 in the PBX. It can be controlled under the same conditions as above. In addition, the L / T card 72 at the remote location is
The / T card 72 can be controlled by the LPU 12 under the same conditions as when it is directly connected to the control highway 40 of the PBX.

The remote RU 70 is connected to the I / O of the RUI 60 for connection with the transmission path 80 mounted in the mounting slot in the line / trunk section 30 in the mounting slot.
O port number is used as an offset value and remote side L
/ The destination address of the control packet to be transmitted to the T card 72 is treated as being added with this offset value, and the destination address of the control packet to be transmitted to the RU 70 side at the remote place is replaced by subtracting this offset value. Also,
By replacing the destination address of the control packet transmitted from the remote side to the PBX body 1 side with this offset value added and transmitting and receiving it, without congesting on the control highway 40 of the PBX body 1 side, It is possible to distinguish each card, and add L /
The T-series card is not restricted by the mounting slot position as in the conventional case.

As described above, the present system mounts the interface card for interfacing each line accommodated in the exchange in the line / trunk portion of the exchange main body, and transmits and receives a call signal through the interface card and controls the communication. An exchange system capable of exchanging signals so as to perform exchange control, wherein a line / trunk portion of the exchange main body is provided with a mounting slot for card mounting, and the interface card is mounted in the mounting slot. An exchange system in which a control signal between this card and the central control unit of the PBX main unit is exchanged by packet exchange through the control highway connected between them and using the time slot assigned to each. , The control signal transfer packet includes control information and a destination address. And a unique address is assigned to each line interface card to have a function of recognizing and receiving its own received packet by this unique address, and at least each installed slot on the exchange side. Each is configured by allocating an I / O port, and is also mounted and connected in the mounting slot on the exchange side, and the signals of the control highway and the communication path highway on the exchange side are multiplexed and transmitted to an external transmission line. , The signal transmitted from the external transmission path is separated into the control highway signal and the communication path highway signal and given to the corresponding highway, and the destination address of the control packet from the control highway on the exchange side is assigned as described above. I /
The address is changed to the address minus the offset value corresponding to the O port, and the reception control packet from the outside uses the time slot corresponding to the address of the sender plus the offset value corresponding to the I / O port. The transmission control interface is designed to be sent to the control side highway on the exchange side, and the control highway on the remote side and the communication path highway according to the same protocol as the exchange side are provided on the remote side, and the remote side is provided on the remote side. The signals of the control highway on the ground side and the communication path highway are multiplexed and transmitted to the external transmission path, and the signal transmitted on the transmission path is converted into a signal for the control highway and the communication path highway. The remote side transmission control interface that is separated and given to the corresponding highway, and these remote side transmission control interfaces Scan an exchange-side transmission control Intafe -
The transmission line that connects to the remote side and the interface of each line accommodated on the remote side are taken, and it is the same as the exchange side that exchanges signals with the control highway and the communication path highway on the remote side. Line interface and the control information which is provided on the exchange side and should be given to the interface is added to the address assigned to the interface as a destination address and output to the control highway. A local function having a function of fetching a self-addressed packet sent to the central control unit and adding the offset value corresponding to the I / O port to a destination address in a transmission packet destined for a remote place. It is configured by a control means.

In this configuration, when the control signal is sent from the central control unit of the exchange to the line interface on the remote side, if the control signal is given from the central control unit of the exchange to the local control means, the local control means The control means adds the destination address of the transmission destination to the control information based on this control signal, packetizes it, and sends it to the control highway.

Then, the transmission control interface on the exchange side connected to the control highway receives this, and subtracts the offset value corresponding to the I / O port assigned to its own installation slot from the destination address. A new destination address is obtained, the new destination address is exchanged, the packet is multiplexed, and the packet is sent out to the transmission line connecting the exchange side and the remote side. The remote side receives this by its own transmission control interface and sends it to the control highway on the remote side. Therefore, the line interface on the remote side fetches the packet addressed to itself from this control highway to receive the control signal from the exchange. Can be received.

On the other hand, a control signal sent from the remote side line interface to the exchange side is made into a packet and sent from the line interface to the remote side control highway using the time slot corresponding to the own card address.

This transmission packet is received by the transmission control interface on the remote side, multiplexed, and sent to the exchange side through the transmission line. The exchange side receives it by its own transmission control interface, restores it to the original packet, knows the sending side card address of the packet from the time slot, and attaches it to itself (transmission control interface). Since the offset value based on the I / O port of the slot is added and the time slot corresponding to this new address is used for transmission to the control highway on the exchange side, the local control means on the exchange side receives this packet. , The line interface card from which the packet is recognized is recognized and the control signal is obtained from the packet. By the above processing, control signals are transmitted / received between the PBX main unit and the remote line interface card (line / trunk circuit).

In summary, the present invention is a line interface
The L / T system card, which is a card, is installed in a plurality of mounting slots of the line / trunk section on the exchange side, and the line / trunk section is provided with a control highway and a communication path highway, and the L / T system card of each mounting slot. Sends and receives signals to and from the central control unit via these highways,
In the remote area, a control highway and a communication path highway based on the same protocol as the line / trunk section are installed,
Prepare a plurality of mounting slots for mounting interface cards, connect the remote side and the exchange side through the transmission path via the transmission control interface mounted in each mounting slot, and send and receive signals by packets. In a system that is designed to send to designated recipients, each L /
A unique card address is given to the T card, and the packet is transmitted from the central control unit using each card address as the destination address, and each card side receives the packet having its own destination address. , The packet from each L / T system card to the central control unit is sent out to the control highway using the time slot corresponding to its own card address. The transmission control interface sends the data to the central control unit by sending it out to the control highway using a time slot corresponding to the address added to the transfer source card address by a predetermined offset value. Depending on whether or not the value is added to the address, the packet for the remote area and the car in the exchange are To be able to distinguish between the packet oriented, as in the prior art imparted with the address in the mounting slot,
This eliminates the need to be aware of the position of the mounting slot, and can be used in any mounting slot, facilitating the addition and position change of the L / T card.

Moreover, the L / T card on the remote side is PB
Even if the L / T card of the X main unit and the card address are duplicated, the card address is corrected by the predetermined offset value in the interface for transmission control of the PBX main unit, so the purpose is not confused. You can exchange packets with other L / T cards.

Therefore, when changing the accommodating position of the line / trunk circuit or adding a line / trunk circuit on the remote side or the PBX main unit side, the accommodation position of the line / trunk circuit of the PBX main unit is taken into consideration. Can be accommodated without doing. The present invention is not limited to the embodiments described above and shown in the drawings, but can be appropriately modified and implemented within the scope of the invention.

[0085]

As described in detail above, according to the present invention,
When accommodating an extension line / station line / dedicated line at a location distant from the main body of the exchange, the line / trunk circuit at a remote location can be accommodated without being aware of the accommodation position of the line / trunk circuit of the main body of the exchange. It is possible to provide an electronic exchange system in which it is easy to add or change a trunk circuit.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram for explaining a card mounting slot of a PBX main body and a local unit in the system of the present invention and a state of card mounting.

FIG. 3 is a diagram illustrating a configuration of a line / trunk section and a central control section on the PBX main body side in the system of the present invention.

FIG. 4 is a diagram for explaining a conventional example.

[Explanation of symbols]

10 ... Central control unit (CC), 11 ... MCPU (main processor), 12 ... LPU (local control unit), 12-1, 73
-1 ... M-ILSI (main interface unit for signal transmission / reception), 13 ... CM (shared memory), 14 ... system bus, 20 ... communication path section, 30 ... line / trunk section, 32 ...
L / T card, 32-1, 60-1, 72-1 ... S-ILSI (sub interface unit for signal transmission / reception), 40, 74
… Control highway, 50,75… Channel highway, 60… R
UI (interface for transmission / reception control), 60-2, 73-2 ...
CPU (processor), 60-3, 73-3 ... SIO (serial input / output section), 60-4 ... Bus, 60-6, 73-6 ... Multiplexing switch, 70 ... RU (remote unit), 72 ... L / T card, 73 ... RUC (remote unit controller).

Claims (4)

[Claims] 1. A line interface card for connecting a terminal, an external line, or the like is mounted in a plurality of mounting slots in a switchboard, and each mounting slot is connected to a control highway and a communication path highway, and is mounted in each mounting slot. The interface card and the central control unit send and receive signals via this highway, and at the remote location, a control highway and a communication highway according to the same protocol as the control highway and the communication highway are provided and the interface is provided.・ Preparing a plurality of mounting slots for mounting cards, connecting the remote side and the main switch unit side by transmission lines via the transmission control interfaces mounted in the mounting slots, and specify the signals to be exchanged by packets Each time in the electronic exchange system that is designed to send to The interface card is given a unique card address, and each card address is used as the destination address for packet transmission from the central control unit. Also, each line interface card side has its own By adding the function to receive the packet with the destination address, each line interface card sends the packet from the self to the central control unit to the control highway by using the time slot corresponding to its own card address. The transmission control interface on the main unit side of the exchange receives a transmission packet from a remote location, and adds the specified offset value to the card address of the transmission source of the packet. Control high using the timeslot corresponding to this address. To the central control unit, and the transmission packet from the central control unit is added with a new destination address subtracted by the offset value from the destination address and transmitted to the remote side. An electronic exchange system characterized by: 2. The electronic exchange system according to claim 1, wherein the offset value is determined according to a position of an installation slot in which the interface for transmission control on the main body of the exchange is installed. 3. The interface for transmission control on the side of the exchange has a function of recognizing the position of the mounting slot in which the self is mounted and calculating and using the offset value corresponding to the position of the mounting slot. The electronic exchange system according to claim 1, wherein the electronic exchange system is provided. 4. A line interface card for connecting a terminal, an external line or the like is installed in a plurality of mounting slots in the exchange, each mounting slot is connected to a control highway and a communication path highway, and is mounted in each mounting slot. The interface card and the central control unit exchange signals via this highway, and at the remote location, a control highway and a communication path highway according to the same protocol as the control highway and the communication path highway are provided, and Prepare a plurality of mounting slots for mounting interface cards, connect the remote side and the exchange main unit side by transmission lines via the transmission control interfaces mounted in the mounting slots, and send and receive signals by packets. In the electronic exchange system designed to send to the specified destination, each line A unique card address is given to each interface card, and each card address is used as a destination address for packet transmission from the central control unit, and each card has its own destination address. In addition to receiving packets, each line interface card transmits packets from itself to the central control unit by sending them out to the control highway using the time slot corresponding to its card address, and transmitting from remote locations. Central control is performed by sending a predetermined offset value to the packet to the control highway on the exchange side using a time slot corresponding to the address obtained in addition to the transfer source card address in the transmission control interface on the exchange side. Transmission from the central control unit to a remote location. A packet is sent to a destination in which the offset value of the transmission control interface is added to the destination address, and the destination address obtained by subtracting the offset value from this destination is transmitted to the remote destination as a packet to the new destination in the transmission control interface. A method for exchanging signals with an electronic exchange, characterized in that the signal is sent to the user.