JPH0818662A - Switch switching network test method and apparatus thereof - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to an exchange switching network test method and apparatus thereof, and is capable of performing a duplicate network configuration test with one of the exchanges of a duplicate network alone, and without developing a pseudo network. The purpose is to reduce man-hours. [Structure] The control unit (11) of the exchange (10a) to be tested
Line trunk from the own switching network (17a) of the line trunk section (12a) of the exchange (10a) to be tested by inverting the polarity of the operation preliminary instruction signal supplied from the switching network (17a) of (a). It is supplied to a selection circuit (20a) for selecting either the control highway or the line / trunk control highway from the other system switching network (17b).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test method and device for testing a switching switching network.

Networks for information communication in recent years are
The conventional telephone-centered voice network is shifting to a computer network that handles computer data. In addition, with the development of multimedia communication terminals,
Various services such as telemarketing have come to be realized, and the importance of networks is increasing. Under such circumstances, the switching equipment, which is the core of the information communication network, is required to have higher reliability than before. For this reason, all the main functions of the exchange prepare two devices (this is called duplication) and switch to a standby device in case of a failure so that call processing does not stop. Of course, the network of exchanges for switching voice / data is also duplicated.

[0003]

2. Description of the Related Art FIG. 8 shows a block diagram of an example of a duplex network of exchanges. In the figure, the exchange 10a comprises a control unit 11a and a line trunk (LT) unit 12a.
The control unit 11a includes a CPU 15a that controls the entire exchange.
An input / output control unit (IOU) 16a to which a disk device (DK) 18a for storing station data, a maintenance console 19a and the like are connected, and a switching network (N
W) 17a is provided. The LT section 12a includes a line / trunk control highway selection circuit (HWI) 20a.
And line trunk circuits (L / T) 21a and 22a are provided. The exchange 10b also has the same configuration, and the control unit 11b includes a CPU 15b, an IOU 16b, and an NW 17b.
Is provided in the LT unit 12b, and the HWI 20b and L / T2 are provided in the LT unit 12b.
1b and 22b are provided.

Here, the CPs of the control units 11a and 11b, respectively.
U15a, 15b, IOU16a, 16b, NW17
a and 17b are duplicated, and LT parts 12a and 12b
Are not redundant but are distributed and installed in the exchanges 10a and 10b. That is, the LT units 12a and 12b are always controlled and operated by the control unit 11a or 11b of the operating system. The control units 10a and 12b are act standby (ACT / *
SBY) signal is used for duplication, the operating system is ACT and the standby system is S
When the failure occurs, the ACT / * SBY signal is switched and the call processing is not stopped.

For example, the CPU 15a of the exchange 10a sends an ACT / * SBY signal (ACT at "1", SBY at "0") to the IOU 16a and NW 17a to notify the status of the own system. ACT / * for NW17a
The local L / T control highway 23a is enabled (activated) only during ACT by the SBY signal, and the ACT / * SBY signal is activated to the other system L / T control highway 24a.
Then, the L / T control highway 23b under the control of the HWI 20b of the other system is controlled. The HWI 20b of the other system LT unit 12b is a circuit for selecting whether or not to draw the L / T control highway 24a into the LT unit 12b.
The ACT / * SBY signal in the a information is pulled in at the time of ACT, and the L / T 21b to 22b of the LT unit 12b are connected to the control unit 11.
It can be controlled from the NW 17a of a. Also, the LT section 12a
HWI 20a is in the opposite state to HWI 20b.

Therefore, when the exchange 11a is the ACT system and the exchange 11b is the SBY system, the NW 17a is the L / T2 of its own system.
1a to 22a and L / Ts 21b to 22b of other systems can be controlled. At this time, since the NW 17b of the control unit 11b is SBY, the own system L / T control highway 12b is invalid, and there is no effect even if the HWI 20b pulls in the L / T control highway 24b from the NW 17a.

Conventionally, there have been the following two methods for testing a duplex network of exchanges.

FIG. 9 shows a method of actually testing the exchange as a duplicated network configuration. In the figure, a test device 30
Is a tester controller (T) connected to the CPUs 15a and 15b.
CNT) 31, a tester input / output controller (IOT) 32 connected to the IOUs 16a, 16b, and NWs 17a, 1
Pseudo line trunk circuit (PLT) 33 connected to the local L / T control highways 23a and 23b of 7b;
The test console 34 is connected to the CNT 31.

FIG. 10 shows a test method in which a test adapter is connected to a connection interface section with another network in a non-redundant network configuration. In the figure, the test apparatus 35 includes a TCNT 31, an IOT 32, a PLT 33, and
A pseudo line trunk (P) connected to the test console 34 and the other system L / T control highway 24a of the NW 17a.
It is composed of an LT) 37 and a pseudo network (PNW) 38.

[0010]

According to the method of FIG.
It is necessary to control two exchanges, which makes the control complicated.
Further, there is a problem that a test space for two exchanges is always required.

Further, in the method shown in FIG.
Pseudo-network for testing WI20a (PN
W) 38 requires the same function as NW17a,
There is a problem that the function of the tester 35 becomes complicated, the number of development man-hours becomes large, and the cost becomes high.

The present invention has been made in view of the above points,
It is an object of the present invention to provide a switching network test method and apparatus capable of performing a dual network configuration test by using only one switch of a redundant network, requiring no pseudo network, and requiring less development man-hours.

[0013]

According to a first aspect of the present invention, an exchange is provided in which the control units of a plurality of exchanges are duplicated and the line trunks of the plurality of exchanges are controlled and operated by a control unit of an operation system. In the switching network testing method of the switching network of the above-mentioned redundant network, the polarity of the operation preliminary instruction signal supplied from the switching network of the control unit of the switching system to be tested is reversed and the switching system of the line trunk section of the switching system to be tested Of the line / trunk control highway or the line / trunk control highway from the other switching network.

According to a second aspect of the invention, in the exchange switching network test method according to the first aspect,
The highway data supplied from the switching network of the control unit of the exchange to be tested is inverted in polarity and supplied to the selection circuit of the line trunk unit of the exchange to be tested.

According to a third aspect of the present invention, the control units of a plurality of exchanges are duplicated, and the line / trunk portions of the plurality of exchanges are controlled and operated by the control unit of the operating system. In the network test equipment, the polarity of the preliminary operation instruction signal supplied from the switching network of the control unit of the exchange to be tested is inverted, and the line trunk control highway from the own switching network of the line trunk of the exchange to be tested is switched. And a data loopback card for supplying to a selection circuit for selecting one of a line trunk control highway from another switching network.

According to the invention described in claim 4, in the exchange switching network test device according to claim 3,
The data loopback card reverses the polarity of the highway data supplied from the switching network of the control unit of the exchange to be tested and supplies it to the selection circuit of the line trunk unit of the switch to be tested.

According to a fifth aspect of the present invention, in the exchange switching network test apparatus according to the fourth aspect,
Instead of the data return card, the exchange to be tested has a test circuit for supplying the operation reserve instruction signal and highway data supplied from the other system line / trunk control highway directly or with polarity inversion to the selection circuit.

[0018]

In the invention described in claim 1, since the operation preliminary instruction signal is polarity-determined and supplied to the selection circuit of the exchange to be tested, only one of the exchanges to be tested of the duplex network can be tested and Eliminating the need for a pseudo network on the device.

According to the second aspect of the invention, since the highway data is inverted in polarity and supplied to the selection circuit, it is possible to detect a collision of the line / trunk control highway due to a system switching failure or the like.

According to the third aspect of the invention, since the data folding card for inverting the polarity of the operation preliminary instruction signal is provided, the invention of the first aspect can be realized.

According to the fourth aspect of the invention, the polarity of the highway data is reversed by the data loopback card, so that the invention of the second aspect can be realized.

In the fifth aspect of the invention, since the exchange to be tested has the test circuit, it is not necessary to provide the data loopback card in the test device.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a block diagram of an embodiment of the test apparatus of the present invention. In the figure, the test apparatus 40 includes a tester control unit (TCNT) 41 connected to the CPU 15a of the exchange 10a, which is the device under test, a tester input / output control apparatus (IOT) 42 connected to the IOU 16a, and the own system of the NW 17a. L
/ T control highway 12a connected to pseudo line trunk circuit (PL
T) 43, a data loopback card (HWLP) 45, and a test console 44 connected to the TCNT 41.

FIG. 2 shows a test route when the exchange 10a is set to ACT. In this case, CPU from TCNT41
15a by controlling CPU 15a to IOU 16a, NW
ACT / * SBY signal supplied to 17a
("1"). As a result, the PLT43 is used for NW17
While controlling the self-system L / T control highway 23a of a, the HWLP 45 controls the other system L / T control highway 24a ₁ of the NW 17a to perform a switching function test of the NW 17a.

FIG. 3 shows a test route when the exchange 10a is SBY. In this case, CPU from TCNT41
15a by controlling CPU 15a to IOU 16a, NW
ACT / * S which is an operation preliminary instruction signal supplied to 17a
The BY signal is set to SBY (“0”). By this, NW
The local L / T control highway 23a of 17a is invalid. In this state, the other system L / T control highway 24a ₁ of the NW 17a is folded back by the HWLP 45 and connected to the HWI 20a as a selection circuit, and the HWI 20a is connected to the own system L / T.
Connect to PLT43 from control highway 23a
Perform functional test of I20a. In this case, ACT / * on the other system L / T control highway 24a ₁ from the NW 17a
Since the SBY signal is SBY (“0”), HWLP45
It is inverted inside and is supplied as ACT (“1”) to the HWI 20a, whereby the HWI 20a can draw the other system L / T control highway 24a ₂ into its own system and a functional test can be performed.

FIG. 4 shows a block diagram of the PLT 43. In the figure, the interface unit 50 is connected to the TCNT 41, and the interface unit 51 is connected to the own system L / T control highway 23a of the NW 17a of the device under test. P
The LT 43 has a memory (MEM) 52 as a switching network test circuit and a control unit (CTL) 53, and the highway data H from the interface unit 51.
WD, frame clock (frequency 8 kHz) FC, sampling clock (frequency 2 MHZ) CLK, ACT /
* SBY signal is supplied to the control unit 53, and the control unit 53
Further, the highway data HWD is supplied to the own system L / T control highway 23a via the interface section 51.

The control unit 53 controls transmission / reception of highway data to / from the highway of the interface unit 51, and the memory 5
Highway data is stored in 2. The transmission data written in the memory 52 by the TCNT 41 of the test apparatus 40 is transmitted from the interface unit 51 to the local system L by the control unit 53.
/ T control highway 23a. The highway data supplied from the interface unit 51 to the control unit 53 is stored in the memory unit 52 and can be read by the TCNT 41. In the test of NW17a,
The test data is written in the memory 52, transmitted to the NW 17a via the control unit 53, the data switched by the switching function of the NW 17a is received, and the memory unit 52 is received.
The data is stored in and is inquired of the transmission data and the reception data.

FIG. 5 shows a block diagram of the HWLP 45.
In the figure, the interface unit 60 is connected to the TCNT 41, the interface unit 61 is connected to the other system L / T control highway 24a ₁ of the NW 17a of the device under test, and the interface unit 62 is connected to the HWI 20a. HWL
The P45 has a memory (MEM) 63 as a switching network test circuit, a control unit (CTL) 64, and a loopback circuit 65. The interface unit 61 outputs highway data HWD, a frame clock (frequency 8).
kHZ) FC, sampling clock (frequency 2MH
Z) CLK and ACT / * SBY signals are supplied to the control unit 64 and the folding circuit 65, and the control unit 64 sends highway data HWD to the NW through the interface unit 61.
Supply to 17a. Further, it is supplied from the folding circuit 65 to the HWI 20a through the interface section 62.

The folding circuit 65 is the interface unit 61.
Highway data HWD and ACT / * supplied from
The SBY signals are inverted, and the frame clock FC and the sampling clock CLK are output from the interface unit 62 without being inverted.

The control unit 64 controls transmission / reception of highway data to / from the interface unit 61, and the memory 63 stores the highway data. Test device 40 TCNT4
The transmission data written in the memory 63 by the controller 1 is
4 from the interface unit 61 to the other system L / T control highway 24a ₁ . The highway data supplied from the interface unit 61 to the control unit 64 is accumulated in the memory unit 63 and can be read by the TCNT 41. In the test of the NW17a, the test data is written in the memory unit 63, and the NW1 is sent via the control unit 64.
7a, receives the data switched by the switching function of the NW 17a, stores the data in the memory unit 63, and collates the transmission data with the reception data.

The folding circuit 65 inverts the ACT / * SBY signal is that the NW 17a can supply the highway data from the other system L / T control highway 24a ₂ to the HWI 20a while the own system L / T control highway 23a is disabled. This is to make it a state. This allows a single exchange 1
By connecting 0a to the test apparatus 40, a test simulating the case where the exchange 10a has a duplex network configuration becomes possible.

Further, the reason why the highway data HWD is inverted by the loopback circuit 65 is that the self-system L / T control highway 23a becomes invalid despite the fact that the CPU 15a has made SBY due to a system switching failure of the exchange 10a. When there is no L / T control highway 23a and HWI2
This is to detect the collision of the other system L / T control highway 24a ₂ pulled in by 0a.

For example, when the highway data supplied from the NW 17a to the HWLP 45 is "55h" (h is hexadecimal), the highway data "AAh" is supplied from the HWLP 45 to the HWI 20a, and the highway data "AAh" is supplied by itself. System L / T control highway 23
a should be supplied to PLT43, and HWLP4
5, the highway data supplied to the PLT 43 respectively
If the AND operation is performed by the CNT 41, it should be "00h". However, if the result of the AND operation is not "00h", it can be determined that there is a system switching failure in the NW 17a.

FIG. 6 is a block diagram of an application example of the device of the present invention in which a test circuit is provided in the exchange 10a which is the device under test. In the figure, the HWI 20a of the exchange 10a is provided with a test circuit 26 described later. The test device 46 is TCNT
41, an IOT 42, a PLT 43, and a test console 44. The test device 40 shown in FIG.
This is a configuration in which LP45 is removed. In this case TCNT4
1 and the CPU 15a are connected to each other, and the IOT 42 and the IOU 16 are connected.
a, the PLT 43 and the own system L / T control highway 23a of the NW 17a are connected, and the other system L / T of the NW 17a is connected.
The T control highway 24a is connected to the test circuit 26 of the HWI 20a.
Connect to and test.

The test circuit 26, as shown in FIG.
The highway data HWD coming from the other system L / T control highway 24a is directly or inverted and the HW from the terminal 71
The frame clock FC and the sampling clock CLK coming from the other system L / T control highway 24a via the switch 72 supplied to the I20a and the terminals 73 and 74, respectively.
To the HWI 20a directly from the terminals 75 and 76, and a switch 79 for directly or inverting the ACT / * SBY signal coming from the other system L / T control highway 24a to the terminal 77 and supplying it from the terminal 78 to the HWI 20a. It is composed of

At the time of the test by the test device 46, the above switches 72 and 79 are the inverted highway data HW.
Highway data HWD, ACT / * that is not inverted during normal exchange operations by selecting D, ACT / * SBY respectively
Select each SBY signal.

That is, the test circuit 26 performs the same operation as the folding circuit 65 of the HWLP 45 shown in FIG. 5 during the test. The HWLP 45 is connected to the PLT 43 and a loopback circuit 62.
The test circuit 2 is added to the HWI 20a because
By adding 6 from the test equipment 46 to HWLP4
5 can be removed. The operation of the memory 63 and the control unit 64 in the HWLP 45 is performed by the memory 52 and the control unit 53 of the PLT 43.

[0038]

As described above, according to the invention as set forth in claim 1, since the operation preliminary instruction signal is supplied to the selection circuit of the exchange to be tested after determining the polarity, one of the exchanges to be tested of the duplex network is tested. It is not necessary to provide a pseudo network in the test equipment while testing only the above.

According to the second aspect of the present invention, since the highway data is inverted in polarity and supplied to the selection circuit, it is possible to detect the collision of the line / trunk control highway due to a system switching failure or the like. .

According to the third aspect of the invention, since the data folding card for inverting the polarity of the operation preliminary instruction signal is provided, the invention of the first aspect can be realized.

According to the invention described in claim 4, the polarity of the highway data is reversed by the data loopback card, so that the invention of claim 2 can be realized.

Further, according to the invention described in claim 5, since the exchange to be tested has a test circuit, it is not necessary to provide a data return card in the test apparatus, which is extremely useful in practice.

[Brief description of drawings]

FIG. 1 is a block diagram of a device of the present invention.

FIG. 2 is a diagram showing a test route during ACT.

FIG. 3 is a diagram showing a test route during SBY.

FIG. 4 is a block diagram of a PLT.

FIG. 5 is a block diagram of HWLP.

FIG. 6 is a block diagram of an application example of the device of the present invention.

FIG. 7 is a circuit diagram of a test circuit.

FIG. 8 is a block diagram of a redundant network of exchanges.

FIG. 9 is a diagram of a conventional duplex network test configuration.

FIG. 10 is a conventional duplex network test configuration diagram.

[Explanation of symbols]

 10a, 10b Switch 15a, 15b CPU 16a, 16b IOU 17a, 17b NW 20a, 20b HWI 21a, 21b, 22a, 22b L / T 40, 46 Test apparatus 41 TCNT 42 IOT 43 PLT 45 HWLP

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Isamu Dobashi 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor Shinichi Sato, 1015, Kamikodanaka, Nakahara-ku, Kawasaki, Kanagawa Prefecture, Fujitsu Limited ( 72) Inventor Seiji Onoguchi 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor Masaru Hosoi, 1015, Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited

Claims (5)

[Claims] 1. The control units (11a, 11b) of a plurality of exchanges (10a, 10b) are duplicated, and the line trunks (12a, 12b) of the plurality of exchanges are controlled by a control unit of an operation system for operation. In the switch switching network test method of the redundant network of the switch to be tested, the switch to be tested by inverting the polarity of the operation preliminary instruction signal supplied from the switching network (17a) of the control unit (11a) of the switch (10a) to be tested. (10
Line trunk control highway from the local switching network (17a) of the line trunk section (12a) of a) and other switching network (17b)
A switching switching network test method, which comprises supplying a selection circuit (20a) for selecting one of a line trunk control highway from the above. 2. The exchange switching network test method according to claim 1, wherein the highway data supplied from the switching network (17a) of the control unit (11a) of the exchange (10a) to be tested is polarity-inverted and tested. Switch (10
(a) Line trunk section (12a) selection circuit (20)
A switching switching network test method characterized by supplying to a). 3. The control sections (11a, 11b) of a plurality of exchanges (10a, 10b) are duplicated, and the line trunk sections (12a, 12b) of the plurality of exchanges are controlled by an operating system control section for operation. In a switch switching network test device for a redundant network of switches to be tested, the switch to be tested by inverting the polarity of an operation preliminary instruction signal supplied from the switching network (17a) of the control unit (11a) of the switch (10a) to be tested. (10
Line trunk control highway from the local switching network (17a) of the line trunk section (12a) of a) and other switching network (17b)
A switch switching network test device having a data loopback card (45) for supplying to a selection circuit (20a) for selecting one of the line trunk control highway from the above. 4. The exchange switching network test apparatus according to claim 3, wherein the data loopback card (45) is a highway supplied from a switching network (17a) of a control unit (11a) of the exchange (10a) to be tested. The line of the exchange (10a) to be tested by reversing the polarity of the data
An exchange switching network test device, characterized in that it is supplied to a selection circuit (20a) of a trunk portion (12a). 5. The exchange switching network test device according to claim 4, wherein instead of the data loopback card (45), the exchange (10a) to be tested is supplied with an operation reserve supplied from another line / trunk control highway. An exchange switching network test apparatus having a test circuit (26) for supplying an instruction signal and highway data to the selection circuit (20a) directly or by inverting the polarity.