JPH0219051A - Modem controller - Google Patents

Abstract

PURPOSE:To quicken the operation diagnosis of a MODEM connection section at application of power by connecting each one end side of a reception system control section and a transmission system control section so as to form a folded loop and detecting a pattern data from a pattern generator when both the control sections are normal. CONSTITUTION:A MODEM connection section MC controlling plural MODEMs MM1-MMn is connected to a control section CS by a reception system line RL and a transmission system line WL. The MODEM control section MC is provided with a switch means 3 connecting each end of MODEM sides of the reception system control section 1 and the transmission system control section 2 to form a folded loop and a pattern generator 4 giving a pattern data for loopback test to the reception system control section 1 synchronously with the operation, the pattern data and the result looped back via the switch means 3 or the like are compared and the result is checked by a checker 5. Thus, trouble-shooting of the normality of the operation of the MODEM connection section MC carried out early at application of power.

Description

[Detailed Description of the Invention] [Part 1] Regarding a modem-controlled till device that is equipped with an internal microprocessor and performs modem communication using a storage control program method, it is important to check whether the modem connection part is operating normally when the device is powered on. The purpose of this system is to provide a control unit that controls transmission and reception, and a reception system control unit and a transmission system that are connected to this control unit by a reception system path and a transmission system path. and a modem connection section that receives various control signals from the control section and controls a plurality of modems, the modem control device having a control section and a modem connection section that receives various control signals from the control section and controls a plurality of modems. A switch means for mutually connecting one end of each modem side with the system control unit to form a return loop, and a pattern generator for providing pattern data for a return test to the input side of the reception system control unit in synchronization with the operation of the switch means. and a checker that compares the pattern data output by the pattern generator with the result returned via the reception system control section, the switch means, and the transmission system control section, and transmits the comparison result to the control section.

[Industrial Field of Application] The present invention relates to a modem control device that has a microprocessor inside and performs modem communication using a storage control program method, and more specifically, the present invention relates to a modem control device that has a microprocessor inside and performs modem communication using a storage control program method. The present invention relates to a modem control device that includes a modem connection unit that controls a plurality of modems, and includes self-diagnosis means for determining whether transmitting and receiving functions operate normally when the power is turned on.

[Prior Art] FIG. 6 is a block diagram of a conventional modem control device. In the figure, C8 is a control unit that controls transmission and reception, and M
C is various I! from the control unit C8. This is a modem connection unit that receives IJIII+ signals and data and controls a plurality of modems MM1 to MMn. The control unit C8 and modem connection unit MC are:
It is connected by a reception path RL and a transmission path WL.

The control unit C8 includes a microprocessor, and outputs a clock signal, cueing signal, data, etc. for controlling the modem 11 using an accumulation control program method to the reception path RL, and the modem connection unit MO outputs the data to the reception path RL. It converts serial signals into parallel signals and distributes data to each modem MM1 to MMn in accordance with the received control signal.

It also converts the data from each modem into a serial signal,
It operates to send the control signal to the control unit C8 side via the transmission path WL.

[Problems to be Solved by the Invention] In a modem control device configured as described above, a failure of this device affects a plurality of modems connected thereto. In conventional devices, when some kind of overconfidence failure occurs, a loopback test of the signal from the modem connection unit MC is carried out in the control unit C8 periodically or in order to discover the failure point. A loopback test of the signal from the control unit C8 was carried out within the modem, and a loopback test was also carried out within each modem.

For this reason, there was a problem in early detection of failure points.

The present invention has been made in view of these problems, and provides a modem that can quickly diagnose whether or not the modem connection section is operating normally when the device is powered on. The purpose is to provide a control device.

[Means for Solving the Problems] FIG. 1 is a block diagram of the principle of the present invention. In the figure C
8 is a control unit that controls transmission and reception, and MO receives various control signals and data from the control unit C8, and connects a plurality of modems MM1 to
This is a modem connection section that controls MMn, and is connected to the control section C8 by a reception path RL and a transmission path WL. In the modem connection unit MO, 1 is a reception system control unit, 2
3 is a transmission system control section; 3 is a switch means for interconnecting one end of the modem side of the reception system control section 1 and transmission system control section 2 to form a return loop when the power is turned on; 4 is an operation of the switch means 3; A pattern generator 5 provides pattern data for a return test to the input side of the reception system control section 1 in synchronization with the pattern generator 4, and 5 is a combination of the pattern data outputted by the pattern generator 4, the reception system control section 1, the switching means 3, and the transmission system control section 2. This is a checker that compares and checks the results returned via the .

[Action 1 When the power is turned on, the switch means
and one end of the transmission system control unit 2 on the modem side are connected to form a return loop. At this time, if each control unit 1.2 is operating normally, the pattern generator 4
The pattern data output from the checker 5 is input to the checker 5 in the same pattern via a loop. By detecting this, the checker 5 performs self-diagnosis of the modem connection unit alone.

[Examples] Examples of the present invention will be described in detail below with reference to the drawings. FIGS. 2 and 3 are block diagrams of an embodiment of the present invention. FIG. 2 shows the control section C8 side, and FIG. 3 shows the modem connection section MC side.

In these figures, parts corresponding to each element in FIG. 1 are designated by the same reference numerals.

In the control unit O8 shown in Fig. 2, the CPU is a microprocessor, the RAM is a random access memory, which stores an accumulation control program for controlling multiple modems, and the SO outputs to the modem side. A control program for the modem and control data from the modem side are stored in the SCN.

R/WL is a transmission/reception control LSI.

In the modem connection section MC shown in FIG.
K, -data R[)ata and pattern generator 4
A selector 6 is a drive circuit for driving the selector 10 and the switch means 3 when the power is turned on.

The reception system control unit 1 includes a receiver (RCV) 11 that receives the signal selected by the selector 10, a serial/parallel converter (S/P) that converts the serial signal from the receiver 11 into a parallel signal, and 13 which receives the signal from the selector 10. Timing means (T
MG>, 14 is a latch circuit (latch) that latches the parallel signal converted by the serial/parallel converter 12 with a timing signal from the timing means 13, 15
inputs parallel data from the latch circuit 14, and specifies the standard of the connected modem (for example, CCi TTv).

28) and is a driver (DRV) that drives the modem.

In the transmission system control unit 2, 21 is a receiver (RCV) that receives a signal from the modem, and 22 is a latch circuit 1atch that latches parallel data received by the receiver 21.
, 23 is a parallel/serial converter (P/C) that converts a parallel signal into a serial signal, and 24 is a driver (DRV) that sends the converted serial signal to the control unit C8.
It is.

A checker 5 inputs the pattern data output from the pattern generator 4 and data from the driver 24 in the transmission system control section 2, and compares both data using a signal from the drive circuit 6.

Reference numerals 1a and lb are a reception system section and a transmission system section for data output from the transmission/reception control OLS I of the control section C8, both of which are internally equipped with a receiver RCV and a driver DRV. 1c and 1d are clock receiving system parts from the modem side, and both have a receiver RCV and a driver D inside.
Equipped with an RV.

3a is a switch means provided between the receiving system section 1a and the transmitting system section 1b.

The operation of the apparatus configured as described above will be explained as follows. FIG. 4 is a time chart showing an example of the operation. 3a, b, and c respectively show the clock RCK, cue signal RFCK, and data RData output by the control program of the control unit C8. In addition, d, e, and f are clocks W received by the control program SCN from the modem side.
CK, cue signal WFCK, and data W Q ata are shown, respectively.

Control data Do-Dn for controlling the modem is provided by the control unit C8.
The receiving path RL and the transmitting path WL are multiplexed and transmitted between the modem connection unit MO and the receiving path RL as shown in the figure.

FIG. 5 is a flowchart showing a self-diagnosis operation performed when the power is turned on. When the power is turned on, the drive circuit 6 drives the selector 10, checker 5, and relay RLY, respectively (step 1). This causes the selector 10 to select the output from the pattern generator 4. Also,
In the switch means 3, the contact M is switched and the contact B is opened, so that one end of the modem side of the reception system control section 1 and the transmission system control section 2 is connected to each other to form a return loop. Next, the pattern generator 4 is placed on the selector 10 side and the check force 5 side,
Output specific pattern data for the repeat test (step 2). This pattern data is received by the receiver 11 via the selector 10, converted into a parallel signal by the serial/parallel converter 12, passed through the latch circuit 14 and the driver 15, and is returned by the switch means 3, and then is returned by the receiver 21. Received.

The folding pattern data received by the receiver 21 is latched by the latch circuit 22, converted into a serial signal by the parallel/serial converter 23, and applied to the checker 5 via the driver 24.

Subsequently, the checker 5 compares the specific pattern data output by the pattern generator 4 and the return pattern data applied via the driver 24 (step 3). Here, if the specific pattern data and the return pattern data are the same, the transmitting/receiving system section 1.2 in the modem connection section MC outputs an OK signal indicating that both are operating normally, and the switching means 3, The selector 10 is driven to release the test loop state (step 4). In addition, if the two signals do not match, the transmitting/receiving system section 1
．． 2, and outputs a signal indicating the abnormality (step 5).

In this case, processing such as processing or replacing the modem connection section will be performed.

The above explanation takes the control signal system as an example, but the same applies to the data transmission systems 1a and 1b.

[Effects of the Invention] As described in detail above, according to the present invention, when the power is turned on, it is possible to early detect whether the operation of the modem connection unit that is connected to and controls a plurality of modems is normal or abnormal. This allows us to provide a highly reliable modem control device.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the principle of the present invention, Figs. 2 and 3 are block diagrams of the configuration of an embodiment of the present invention, Fig. 4 is a time chart showing an example of operation, and Fig. 5 is a self-diagnosis operation. The flowchart shown in FIG. 6 is a block diagram of the configuration of the conventional device. In FIGS. 1 and 2, C8 is a control unit, MC is a modem connection unit, MM1 to MMn are modems, RL is a reception line, WL is a transmission line, 1 is a reception system Ill 111 section, 2 is a A transmission system control section, 3 is a switch means, 4 is a pattern generator, and 5 is a checker. Patent applicant: Fujitsu Limited
Company representative, attorney, patent attorney Fuji Ijima, 1 person C5 / Invention 〇-Crushing example of oval bottom block 1 area) 2nd ward corner answer 6 4 mouths

Claims (1)

[Claims] A control section (CS) that controls transmission and reception, and a reception system control section (1) connected to this control section by a reception path (RL) and a transmission path (WL). Transmission system control section (2)
and a modem connection unit (MC) that receives various control signals from a control unit (CS) and controls a plurality of modems, the modem control device comprising: a modem connection unit (MC) that receives various control signals from a control unit (CS), At the same time, a switch means (3) connects one end of each modem side of the reception system control section (1) and transmission system control section (2) to each other to form a return loop, and synchronizes with the operation of the switch means (3). a pattern generator (4) that supplies pattern data for loopback testing to the input side of the reception system control section (1);
), a switch means (3), and a checker (5) that compares the result returned via the transmission system control section (2) and transmits the comparison result to the control section (CS). Modem control device.