JP3350209B2 - Telephone exchange - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-blocking time switch in a time-division telephone exchange, and more particularly to a method for allocating highways and time slots freely based on the type of package in which the highways and time slots are allocated. About.

[0002]

2. Description of the Related Art Conventionally, in order to provide a non-blocking time switch in a time-division telephone exchange, there has been used an allocation system in which a highway and a time slot are fixedly allocated to each communication circuit of a contained communication path system package. Have been.

FIG. 17 is a highway pattern diagram for explaining a conventional highway allocating method, in which four highways (HW0 to 3) are connected to a back wiring board (BW).
B). In addition, HW0 to HW3 represent both the ascending and descending highways in one line. In FIG. 17, HW0 from the time switch (TSW)
Indicates the package slot (PK) of module 0 (M0).
G) Wired only to 0-3, similarly HW1 is package slot (PKG) 4 of module 1 (M1)
HW2 is a package slot (PKG) of module 2 (M2) 8 to 11, HW3 is a package slot (PKG) 12 to 15 of module 3 (M3).
, Respectively.

FIG. 19 is a diagram showing the relationship between a conventional highway 0 time slot configuration and a package slot, and this highway is composed of 64 time slots (TS). Therefore, the bearer communication speed of HW0 is 64 (TS) × 64 (Kbps) = 4.096 (Mbp)
s) The 64 TSs of HW0 are divided into four groups of 16 TSs each, and these groups correspond to package slots 0 to 3, respectively. As a result, the speech path system package mounted in the package slot is normally fixedly allocated so that a maximum of 16 TSs can be used.

The highways 1, 2, and 3 also have the same configuration as the highway 0, and these TSs are also grouped and configured to correspond to package slots.

FIG. 18 is a diagram showing an example in which a communication path system package is specifically mounted in such a configuration. In FIG. 18, PKG0 is a line circuit package (LIN), PKG1 is an office trunk package (COT), PKG2 is an ISDN trunk package (ISDN), and PKG4 is a line circuit package (LI).
N), and a configuration in which a 4M digital trunk package (PRI) is mounted on the PKG8.

FIG. 16 is a diagram showing the correspondence between the type of the communication channel system package, the number of time slots required for the operation of the package, and the number of package widths required for mounting, wherein COT is 8TS and LIN is 16TS. , ISDN is 3
2TS and PRI indicate that 64TS is required. Therefore, when the communication path system package is mounted as shown in FIG. 18, the HWs 0, 1, and 2 are fixedly allocated as shown in FIGS. 20, 21, and 22.

FIG. 20 is a diagram showing a time slot allocation state of highway 0. In FIG. 20, TS0 to TS15 are assigned to the LIN mounted on PKG0.
TSs 15 to 31 are assigned to the COT mounted on the KG1. Here, COT indicates that the number of required TSs is 8TS.
Therefore, the TSs actually used are TS16 to TS23, and the TSs 24 to 31 are unused. In addition, TS32 to TS47 correspond to PKG2, but ISDN has three
Since 2 TSs are required, ISDN includes TS 32 to 63
Is assigned. As a result, all the TS0 to 63 of the HW0 have been allocated, so that the communication path system package cannot be mounted on the PKG3.

FIG. 21 is a diagram showing a time slot allocation state of the highway 1. In FIG. 21, TS0 to TS15 are assigned to the LIN mounted on the PKG4, and TS16 to TS63 are not used. Also, PKG
5 to 7 are empty slots. Furthermore, when the PRI is mounted, since the number of TSs used by the PRI is 64 TS, the PRI cannot be mounted in other package slots (PKG5 to PKG7) using the HW1 (the remaining 48TS). Therefore, the PRI needs to be mounted in a package slot (PKG8-11) using the HW3.

FIG. 22 is a diagram showing a time slot allocation state of the highway 2. In FIG. 22, the PRI mounted on PKG8 includes all time slots TS of WH2.
No. 0 to 63 are allocated, so that other slots (PKGs 9 to 11) using the HW2 cannot be loaded with other communication path packages.

As described above, in order to provide a non-blocking time switch in a conventional time-division telephone exchange, a highway and a time slot are fixedly allocated to each communication circuit of a contained communication path system package. Method was used.

[0012]

In the conventional highway and time slot allocation method, unused time slots are determined by the number of time slots allocated to the package slots and the number of time slots required by the communication path system package to be mounted. Alternatively, there is a problem that a mounting area (package slot) that cannot be mounted occurs.

In recent years, the speed of digital communication has been increased, and when comparing the digital communication channel system package and the analog communication channel system package, the time slot occupied by the digital communication channel system package has the same volume ratio. Is becoming very large. Therefore, in a system equipped with a large number of analog communication channel packages, many unused time slots occur, and in a system equipped with a large number of digital communication channel packages, there are many mounting areas that cannot be mounted.

An object of the present invention, a highway and time slot freely to allow assignment to based on the type of switch fabric package to be mounted, up to the maximum highway and the number of time slots that the system can tolerate, speech path package It is an object of the present invention to provide a telephone exchange in which a telephone can be mounted.

[0015]

SUMMARY OF THE INVENTION The present invention provides a central control unit.
And a time switch, connected to the time switch
A highway, wherein the central controller
Phone exchange for controlling the allocation of the time slots and the time slots
Machine, the central control unit having the available high
Conversion table for storing way and time slot information.
And time slots for types of communication channel packages
Storage means for storing the number of communication paths indicating
Data that instructs the installation of a call path system package from the panel
When the data is input, the data is stored in the conversion table.
Call path information and calls stored in the storage means
Based on the number of time slots for the type of road system package.
And select the call circuit of the call path system package
The high used by the communication circuit of the communication path system package
The conversion table by allocating ways and time slots;
Allocating means for reconstructing a highway connected to the highway
The highway assigned to the channel system package and
And notifying means for notifying time slot information .

[0016]

According to the configuration described above, the communication path system package can be mounted up to the maximum number of highways and time slots that the system can tolerate. Therefore, if this is applied to a distributed system, an analog-based system can provide a scalable system.
With a digital-based system, a more compact system can be constructed, and a system can be constructed efficiently and economically.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a time division telephone exchange (PB) according to the present invention.
FIG. 2 is a system configuration diagram of X). In FIG. 1, an ascending highway 10 and a descending highway 11 extend from a time switch (TSW) 12.
0 and 11 are connected to a communication path system package.
It is assumed that each of the ascending highway 10 and the descending highway 11 includes four highways (details of the highway configuration will be described with reference to FIG. 2).

The installed communication path system package is a line circuit package (L
IN) 13, a line trunk package (COT) 19 for interfacing with an analog line, an ISDN trunk package (ISDN) 20 for interfacing with an ISDN line, and a 4M digital trunk package for interfacing with a 4M digital line. (P
RI) 21. The communication path system package and the time switch 12 are electrically and logically connected to a central control unit (CC) 22 for controlling the entire PBX via a control line 24. It operates under the control of the control device 22.

A storage device (MEM) 23 connected to the central control unit 22 stores a control program, station data, and various tables necessary for the central control unit 22 to control the entire PBX. is there. Further, a maintenance panel (MP) 25 is connected to the central control device 22, and the above-mentioned input of station data is performed by the maintenance panel 25.

FIG. 2 is a highway pattern diagram for explaining a highway allocating method according to the present invention. Four ascending and descending highways (HW0 to 3) are wired to a back wiring board (BWB). Each of the HWs 0 to 3 expresses both the highway 10 and the highway 11 shown in FIG. 1 in one line. In FIG. 2, HW0 from the time switch 12
Are package slots (PKG) 0 to 3 of module 0 (M0), package slots (PKG) 4 to 7 of module 1 (M1), and module 2 (M2).
Package slots (PKG) 8 to 11 and module 3 (M3) package slots (PKG) 12 to
15 are wired.

Note that four ascending and descending highways (H
W0 to 3) will be described below assuming that each of W0 to 3) is composed of 64 time slots (TS). Therefore, the bearer communication speeds of those HWs are all 64 (TS) × 64 (Kbps) = 4.096 (Mbp)
s).

FIG. 3 is a diagram showing an example of a case where a communication path system package is specifically mounted in the configuration shown in FIGS. In FIG. 3, PKG0 is a line circuit package (LIN), PKG1 is an office trunk package (COT), PKG2 is an ISDN trunk package (ISDN), PKG3 is a line circuit package (LIN), and PKG4 is a 4M digital trunk package (LIN). PRI) are shown.

FIG. 4 is a block diagram of a communication path system package applied to the present invention. In FIG. 4, HW0-3
Is connected to the highway demultiplexing circuit 401,
Thereby, 16.384 (Mbps) = 4.096
A package highway signal 402 of (Mbps) × 4 (HW) is configured. That is, as shown in FIG.
0 to 3 are serially combined and 265 (TS) × 64
(Kbps) highway.

The highway interface circuit (HWI)
/ F) 403 forms an interface between the signal of the package highway 402 and the signal from the communication circuit 404, inserts the signal from the communication circuit 404 into a predetermined time slot of the package highway 402, and
A signal of a predetermined time slot of the package highway 402 is extracted and transmitted to the communication circuit 404. Note that the call circuit 404 is a circuit corresponding to the type of the package,
One or more are provided according to the type. The communication speed between the highway interface circuit 403 and the communication circuit 404 is determined according to the type of the communication circuit 404, and is 64 (Kbps) if the communication circuit is an analog communication path system such as a line circuit or an office trunk. If the communication circuit is a digital communication path system, the communication speed becomes a speed corresponding to the communication speed on the line side, for example, 1.5 (Mbp).
s), 2 (Mbps) or 4 (Mbps).

The counter circuit 405 outputs a signal based on a synchronization signal (SYNC) from the package highway 402.
The count signal is sequentially counted for 56 (TS), and this count signal is used for detecting the time slot position on the package highway.

The comparison circuit (CMP) 406 is used for selecting the communication path system package to be transmitted when the central control unit 22 of the PBX sends control information to the communication path system package. Input signals A0, A1, A2, and A3 of the comparison circuit 406 are input with an address signal (package address) previously wired on the back wiring board.
If G0, “0000” as the package address
Is entered. The input terminals B0, B0,
B1, B2, and B3 include a package selection signal PSEL included in a control line 24 from the central control unit 22 of the PBX.
0, 1, 2, and 3 are connected, and when the package address matches the package selection signal, this package is selected, and the package selection signal PSEL is turned on at this time.

A control unit (MPU) 407 controls the entire communication path system package. That is, when the package selection signal PSEL is in the ON state, the transmission signal S included in the control line 24 from the central control device 22 of the PBX.
Based on D and the received signal RD, communication for package control is performed with the central control device 22. Thereby, control based on the order from the central control device 22, transmission control of state information to the central control device 22, and the like are performed. .

The register 408 stores a highway and a time slot which can be used by the communication circuit 404 of the communication channel system package as a table.
The construction of this table is performed under the control of the control device 407 based on the table construction information received by the control device 407 from the central control device 22.

The communication circuit selection control circuit 409 always detects the time slot position on the package highway based on the count signal from the counter circuit 405, and based on this detection and the table constructed in the register 408, the communication circuit The communication circuit selection signal CCT. SEL0 to SEL are turned on. That is, the communication circuit selection signal CCT. SEL0-n
Thus, the communication circuit 404 is selected, and the transmission and reception of the communication signal can be performed between the selected communication circuit and the highway interface circuit 403.

As described above, the communication path system package is configured.

Next, the operation of processing for allocating highways and time slots according to the present invention will be described.

FIG. 6 is a flowchart showing a highway and time slot allocation processing routine. First,
A construction person or a maintenance person inputs station data from the maintenance panel 25 based on the system configuration (S601).
That is, data such as the type of the communication path package mounted in the package slot and the definition with use of this package are set. Then, the central control device 22 determines the type of the installed communication path system package and the accommodation position (PKG No.) of the package from the input station data (S602), and the number of time slots required for each package to operate is determined. Is determined (S603). This is performed by a table stored in the storage device 23 as shown in FIG.

Next, the central control unit 22 automatically assigns a usable highway and a time slot to each communication circuit of each installed communication channel system package based on the information obtained in S603 (S605). ), Whereby each communication circuit No. of each communication path system package is obtained. And highway and time slot No. Then, a conversion table indicating the correspondence relationship with is generated (S605). FIG. 7 is a diagram showing the configuration of the conversion table when the communication path system package is mounted as shown in FIG. In FIG. 7, for example, P
The LIN mounted on KG0 is TS0-1 of HW0.
5 is assigned, indicating that the communication circuit 0 can use the TS0 of the HW0. Similarly, the communication circuit 15 of the ISDN mounted on the PKG2 has the TS54 of the HW0.
And TS55 are allocated, and this time slot becomes usable.

When the conversion table is configured as described above,
Next, the central controller 22 assigns the highway and the time slot No. assigned to each communication path system package to the communication circuit of each communication path system package. Is notified (S606). That is, the central controller 22 determines the highway and time slot No. assigned to each communication path system package from the conversion table. Is read, and this is
4 to each communication path system package.

On the other hand, the control device 4 of each communication path system package
07 is the highway and time slot No. received from the central control device 22. Is written into the register 408, and the communication circuit and the highway and the time slot No. Are stored in association with each other. FIG.
FIG. 4 is a diagram illustrating a configuration of contents stored in a register of a LIN mounted on G0, and shows that a communication circuit 0 can use TS0 of HW0. Similarly, FIG. 9 is a diagram showing a configuration of contents stored in a register of COT mounted on PKG1, and FIG. 10 is a diagram showing a configuration of contents stored in a register of ISDN mounted on PKG2. , FIG. 11 shows the L mounted on the PKG3.
The figure showing the structure of the content stored in the register of IN,
FIG. 12 is a diagram showing the configuration of the content stored in the PRI register mounted on the PKG4. As described above, the communication circuit and the highway and the time slot N where the communication circuit can be used are stored in the register of each communication path system package.
o. Are stored in association with each other.

Next, as described above, the communication circuit and the highway and the time slot No. for which the communication circuit can be used are registered in the register of each communication path system package. The operation of the communication path system package after storing in correspondence with the above will be described.

FIGS. 13 and 14 are diagrams for explaining the operation of each communication path system package in a state where the communication path system package is mounted as shown in FIG. 3, and show the operation of the communication circuit selection signal (CCT.SEL). The transmission timing is shown.
Here, a specific operation will be described using the LIN of PKG0 and the ISDN of PKG2 as an example.

The information shown in FIG. 8 is stored in the register 408 of the LIN mounted on the PKG0 as described above. Based on the 256 count signals received from the counter circuit 405 and the information stored in the register 408, the LIN speech circuit selection control circuit 409 provides the speech circuits with HW and TS timings that can be used by each speech circuit. Outputs "ON" signal. In FIG. 13, L
IN circuit control signal 0 (CC
T. SEL0) indicates that PKG HW402 is HW0 and TSNo. Is in the “ON” state when is TS0. At this time, the communication circuit 0 is in the operating state, the communication circuit 0 and the highway interface circuit 403 are logically connected, and PCM-coded communication signals are transmitted and received.
That is, the highway interface circuit 403 operates as HW0
The signal received from the communication circuit 0 is placed on the TS0 of the PKG HW402, and the communication signal of the TS0 of the HW0 of the PKG HW402 is transmitted to the communication circuit 0.

Similarly, control is performed to sequentially output the communication circuit selection signals (CCT.SEL1 to 15) to the communication circuits 1 to 15 in accordance with the timing of TS1 to TS15 of HW0, and the result is stored in the register 408. Communication circuits 0 to 0 according to the timing of HW and TS that each communication circuit can use
15 is controlled.

The ISDN mounted on PKG2
The register 408 stores the information shown in FIG. 10 as described above. In FIG. 13, a call circuit selection signal 0 (CCT.SEL) for controlling a call circuit 0 of ISDN is provided.
0) indicates that PKG HW402 is HW0 and TSN
o. Is "on" when TS24 and TS25 (ISDN indicates that one speech circuit requires two time slots). At this time, the call circuit 0
Is in an operating state, the communication circuit 0 and the highway interface circuit 403 are logically connected, and PCM-encoded communication signals are transmitted and received.

Similarly, control is performed to sequentially output the call circuit selection signals (CCT.SEL1 to 15) to the call circuits 1 to 15 in accordance with the timing of TS24 to TS55 of HW0, and the result is stored in the register 408. Communication circuits 0 to 0 according to the timing of HW and TS that each communication circuit can use
15 is controlled.

Next, the operation when the central controller 22 controls the time switch 12 will be described. FIG.
5 is a flowchart illustrating an operation when the central control device 22 controls the time switch 12. In FIG. 15, first, the central control unit 22 controls the PKG No. to be controlled. Is extracted (S1501), and the PKGNo. Then, the number (CCT No.) of the communication circuit to be controlled is extracted (S1502). Next, referring to the conversion table shown in FIG. HW / TSNo.
Is retrieved (S1503). As a result, the HW / TSNo. Is extracted (S1504), and the extracted HW / TSNo. The desired time switch control is performed based on (S1505). As described above, when the time switch control is performed, the HW /
TSNo. Is recognized by referring to the conversion table, and thereafter,
Control the time switch.

As described above, according to the highway and time slot allocation method of the present invention, the size of the telephone exchange can be reduced by efficiently using the highway, the time slot, and the package slot.

When a multifunctional telephone 18 shown in FIG. 1 is newly added in a state where the communication path package is mounted as shown in FIG. 3, the multifunctional telephone line package (MTLIN) 17 is added. It is necessary to mount a new package slot. In this case, MTLIN17
Can be mounted in the package slot 5 (PKG5) shown in FIG. That is, when the station data of the MTLIN 17 is newly input from the maintenance panel 25, the central controller 22 reconstructs the conversion table shown in FIG. 7 based on the input station data, and allocates the HW / TSNo. Information about MTLIN1
7 can be easily performed.

Therefore, according to the present invention, it is possible to provide a telephone exchange which can easily and flexibly cope with system expansion and change.

[0047] In the present embodiment has described the case having four highway, this may be a single highway. That is, it can be easily realized by storing only the information regarding the time slot in the storage device 23 conversion table and the register 408 of the communication path system package.

In this embodiment, the four highways are multiplexed and demultiplexed like one highway in the communication path package. However, the four highways are multiplexed and demultiplexed in the time switch 12, The multiplexed highway can also be provided directly to the channel package.
In this case, the demultiplexing circuit 401 of the communication path system package can be omitted, and the telephone exchange can be constituted by only one demultiplexing circuit in the time switch 12.

[0049]

According to the present invention, it is possible to freely assign the highway and time slot based on the type of switch fabric package to be mounted, up to the maximum highway and the number of time slots that the system can tolerate A communication path package can be installed.

Therefore, by applying this method to a telephone exchange, it is possible to achieve a remarkable operation and effect that the telephone exchange can be reduced in size and the telephone exchange system can be flexibly expanded.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a time division telephone exchange according to the present invention.

FIG. 2 is a highway pattern diagram for explaining a highway allocation method according to the present invention.

FIG. 3 is a diagram showing an example of a case where a communication path system package is specifically mounted.

FIG. 4 is a block diagram of a communication path package applied to the present invention.

FIG. 5 is a diagram for explaining the operation of a communication path package applied to the present invention;

FIG. 6 is a flowchart showing a highway and time slot allocation processing routine according to the present invention.

FIG. 7 is a diagram showing a configuration of a conversion table according to the present invention.

FIG. 8 is a diagram showing a configuration of contents stored in a register of a line circuit package.

FIG. 9 is a diagram showing a configuration of contents stored in a register of a central office trunk package.

FIG. 10 is a diagram showing a configuration of contents stored in a register of an ISDN trunk package.

FIG. 11 is a diagram showing a configuration of contents stored in a register of a line circuit package.

FIG. 12 is a diagram showing a configuration of contents stored in a register of a 4M digital trunk package.

FIG. 13 is a diagram illustrating the operation of each communication path package.

FIG. 14 is a diagram illustrating the operation of each communication path system package.

FIG. 15 is a flowchart showing a time switch control routine of the present invention.

FIG. 16 is a diagram showing the number of time slots required for operation of each communication path system package.

FIG. 17 is a highway pattern diagram for explaining a conventional highway allocation method.

FIG. 18 is a diagram showing an example of a case where a conventional communication channel package is specifically mounted.

FIG. 19 is a diagram showing a relationship between a conventional highway 0 time slot configuration and a package slot.

FIG. 20 is a diagram showing a conventional time slot allocation state of highway 0.

FIG. 21 is a diagram showing a conventional time slot allocation state of a highway 1;

FIG. 22 is a diagram showing a conventional time slot allocation state of a highway 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Up highway 11 ... Downhill highway 12 ... Time switch 13 ... Line circuit package 14 ... Analog telephone 17 ... Multifunction telephone 18 ... Line circuit package for multifunction telephone 19・ ・ ・ Office trunk package 20 ・ ・ ・ ISDN trunk package 21 ・ ・ ・ 4M digital trunk package 22 ・ ・ ・ Central control unit 23 ・ ・ ・ Storage device 25 ・ ・ ・ Maintenance panel

Claims (1)

(57) [Claims] A central control unit, a time switch,
A highway connected to a time switch,
A central control unit for the highway and the time slot
A telephone exchange for performing assignment control of the central control unit.
The available highway and the time slot
Conversion table for storing call information and communication path system package
Memorize the number of channels indicating the time slot for each type
Storage means, and a communication path packet from the maintenance panel.
When data for loading a page is input,
Communication path information stored in the conversion table and the storage
For the type of channel system package stored in the means
Based on the number of time slots
Select the communication circuit of the
Highway and time slot used by the communication circuit of
Allocating means for allocating and reconstructing the conversion table;
The above-mentioned assignment is included in the communication path system package connected to the highway.
Notify attached highway and time slot information
And a notifying means.