JPS59101937A - Device for checking manual zone of optical subscriber line formed of glass fiber having bidirectional multiple wavelength - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical subscriber line manual section checking device of the type defined in claim 1.

With the use of multi-wavelength glass fiber transmission sections per subscriber section, increasingly complex measurement and horizontal techniques are required to accurately detect the full range of functions in each individual transmission section. Ta.

It is therefore desirable for the supervisor to have the possibility of determining the acceptability of the optical transmission section by simple means, simply in order to obtain an overview of the functionality of the optical transmission section and the wavelengths transmitted throughout this section.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a device which makes it possible to obtain an overview of the individual wavelength functionality of the associated transmission path on an optical subscriber line in which multiple wavelengths are used. There is a particular thing.

This problem is solved by taking the measures indicated in the characterizing part of claim 1 of the invention.

The functionality check for each transmission line, each assigned to a wavelength, is carried out while the associated key (on the transmitter) is pressed and ends as soon as the key is released. .

Next, the present invention will be explained based on the illustrated embodiment: In FIG. 1, the M signal is not activated in the key 2, and the operating state of the transmitter 1 is determined (the criterion is the threshold current of the laser). is generated in accordance with the key 2 and is combined with the keying function of key 2 by using a well-known R8-7 lip-flop (not shown). As a result of this packing, a logic signal "CHECK" is generated.

This logical signal "check"? The circuit for generating
Since a disjunction exit is provided, copying of keying function 2 can also be done from other sources.

As long as the laser transmitter 1 is in operation, i.e. as long as the threshold current is flowing, the keying function in the key 2 is disabled.

The release of a manual section check is indicated to the operator by a light emitting diode (not shown) provided on the laser transmitter 1 to be checked.

In the known manner, as shown in FIG. A cable is used. Conductor 6 is the logic signal “check”
It is used for feedback transmission and performs two functions with self-retention of the frequency transmitter 1 during keying operations: Connection of the frequency transmitter T with the input e/a valved .

口2 Generates a continuous synchronization signal that is released by controlling the input DB. (As long as the continuation synchronization signal is issued, data transmission is interrupted.) The transmission of f-coupled synchronization No. 100 is as follows:
All time multiplex slots that can be generated in the radio frequency transmitter I are assigned in any time field by means of synchronization words.

FIG. 2 shows an example of a circuit technology implementation for wavelengths λ and λ4.

At the far end of the transmission section λ□, a continuous synchronization signal for wavelength λ is detected. To do this, first the converter 10
A nine-electrical conversion takes place within. From this converter 10, information transmitted in series and accompanying PLL are transmitted.
The bit tough generated by the phase-locked loop circuit or phase-controlled circuit] BT is transmitted to the serial/parallel converter (high-frequency receiver 11) which is then delayed with its associated time frame and continuous synchronization detection device. be done. When continuous synchronization detection is performed, a result is output when the -signal [DsEJ] is detected.

Since one OR element is provided at the output of the circuit for generating the logic signal [DsEJ, the It is possible to combine them with one node 8.

This physical signal ['Del is supplied to the backup circuit 9 assigned to the section having the wavelength λ4.

If the "DSE" signal is also applied, the frequency transmitter I is switched on via the output e/ai of the preliminary circuit 9. In this state, the -frequency transmitter I generates a time multiplex frame with the start of the same fiAI:I check. Within this time multiplex frame, a PCM multi-channel system, in this case 60 channels'([-:'f
The PCM3[] system with 9 valves is connected to the standby circuit. Pre-circuit 9 (pre-equipped for 1”D S EJ transmission) 1D for sustaining checks within 8 bits/8 channel of PCM60 system
SE” signal ° is processed. Furthermore, the series data current supplied from the frequency transmitter I and also containing the "DSE" signal is supplied to the electro-optical converter 1 (Ray transmitter N) together with the BT (bit tough).

However, at this electric-yuan converter 1 (rede transmitter), the key 2 assigned to f4a (distributed to the rede transmitter 1) is directly pressed.
Check 70 processes (
It is also possible to initiate a Step Up, Check. When key 2 releases this check process, the time slots on the transmission line running between the two keys are filled without being interrupted by a synchronization word.

As shown in Figure 6, the feedback transmission information is
The serial/
Processing continues in the parallel converter 11. If the transmitted information contains a 108gJ signal fP bit 8 to 78 channel of the CM60 system, the signal "DSE" is detected by the multiplexer (FW-E16) and (FW-E 14) and emitted. If the information received as indicated by the diode 3a consists of a synchronization word, the signal "DSE" is detected directly at the serial/parallel converter 11, which is also connected to the light emitting diode. The display may also be omitted.

As is further evident from this FIG. 1) is transmitted at wavelengths λ and Σ.

To this end, the respective circuits of the backup circuit 9, the multiplexer (multiplexer FW-813) and the frequency transmitter 1 are used (1) in the form already explained in connection with FIG.
It will be done.

As described above, according to the present invention, it is possible to check the function of the most important part in the transmission section in a simple manner.

At this location, the key is used to open all interlocking circuits that allow operation of the laser transmitter only during non-operating hours, thereby transmitting this information to the synchronized tower. At a remote location in the transmission path, this information is detected and generated as a @smoke signal "DSE" and optionally displayed by a light emitting diode.

By using the spare circuit 9, it is also possible to transmit the No. 100 ID5EJ on another wavelength in one reserved channel in a multichannel system and to transmit it back to the point where the checking process was started.

[Brief explanation of the drawing]

FIG. 1 shows a switch-on device for a radar transmitter;
Figure 2 shows the equipment installed at remote locations in the transmission section for incorporating DSg signals into a multi-channel system, and Figure 6 shows the complete equipment installed at the beginning and end of the transmission section. It is. DESCRIPTION OF SYMBOLS 1... Rade transmitter, 2... Key, 3a... Light emitting diode r, 4... Data transmission, 5... Bit tact transmission, 6... Conductor, 7... High frequency Transmitter, 8...
・Node, 9... Reserve circuit, 10.10a... Converter, 11... Series/parallel converter, 13.14... Multiplex device (FW-813, F'W-814)
. Agent Akira Asamura

Claims (1)

[Claims] The subscriber line includes a high frequency transmitter (parallel/serial converter), an electro-optical converter (ray transmitter), an optical-to-air converter, and a high frequency receiver (@ column). In an apparatus for manual section checking of an optical subscriber line consisting of a bi-directional, multi-wavelength glass fiber comprising a series cable circuit consisting of a parallel converter and By using the key (2), the radar transmitter (1) is turned on via an interlocking circuit that allows the radar transmitter (1) (drowsiness-light converter) to be fully operated only during non-operating hours. Frequency transmitter (7) (parallel/serial conversion a)
By transmitting connection synchronization information provided by a device located at 11
) (serial/parallel converter) and the logic signal 1'-
A device, characterized in that it is configured to be emitted as a DSFiJ and to be transmitted in the opposite direction within one channel in a multi-channel system. (2. The device according to claim 1, characterized in that the threshold current of f(I) of the operating state of the radar transmitter (1) is used as the new standard. (3) In the device according to claim 1 or 2, the clearing of the signal "check" that is not released by the key (2) and the presence of the logic signal rpsEJ,
Km characterized in that each of them is designed to be labeled as '''C4 by means of a light emitting diode. Device, characterized in that the frequency receiver (11) is equipped with a connection synchronization word detection device (rDsEJ).