JP2750040B2 - Memory module for optical connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memory module for an optical connector mounted on an optical connector at an end of an optical cable.

[0002]

2. Description of the Related Art As a real-time communication line management system for an optical line network, a memory in which equipment information is stored is provided in the optical line equipment itself. There has been proposed an advanced line construction / maintenance support system in which equipment information in these memories can be transferred to a station via a dedicated communication line by distributing the information in a connection terminal box at the end or the like. As a component of this system, a connector with memory that has a memory mounted on it is realized. With this connector with memory, it is possible to create various types of unique data objects such as fiber type, accommodation unit number, cable number, etc., for the optical cable to be connected. Has become.

In this system, for example, route information of an optical communication network can be grasped by a combination of identification information of a memory module attached to an end of an optical cable. Can be done quickly.

As the above-mentioned memory, a semiconductor memory and an analog resistance memory are generally used. In particular, since the resistance memory can reduce the number of input / output terminals as compared with the semiconductor memory, the reliability of connection is improved. In addition, there is an advantage of mass production that mass production can be performed at low cost. For example, as shown in FIG. 3, the resistance memory includes a diode D and resistances R1 and R2. These resistance values are set in correspondence with optical line information, and the resistance value is read by the system. Thus, data on various lines can be extracted.

FIG. 4 is a plan view showing a mounting surface of a memory board mounted on the optical connector. In FIG. 4, 41e and 42e are two lead terminals for electrically connecting the memory board to the system. A diode D and chip resistors R1 and R2 corresponding to those shown in FIG. 3 are mounted on the mounting surface. The memory board is housed in a package (memory container) as shown in FIG. 1 and mounted and fixed to various optical connectors at the end of the optical cable. For example, FIG. 5 is a longitudinal sectional view of a single-core SC connector 52 on which the memory module 51 is mounted, and the protruding direction of the lead terminals 51a and 51b of the memory board is set to the direction of the optical cable (arrow x). Being parallel. In addition, the memory board 53 is a memory module 5
1 is also incorporated in the package main body so that the mounting surface is housed toward the inside of the package.

FIG. 6 shows a printed circuit board on the system side to which lead terminals of the memory board are connected.
The printed circuit board 61 is provided at a cable connection point such as a connection terminal box. In this figure, a large number of optical connectors 62,... One side area 63 of the substrate is a double-sided circuit area for mounting an EEPROM or the like described later. For example, the above-described single-core optical ferrule of the SC connector is connected to optical connectors 62,... On a printed circuit board, while the lead terminals of the memory module are connected to two-terminal electrical terminals arranged adjacent thereto. Connector terminals 63, ...
Connected to ...

Next, FIG. 2 shows the printed circuit boards 21,.
... shows the electrical configuration of the peripheral system. In this figure, n memory modules M1, M2,..., Mn are connected to a printed circuit board 21, and analog switches S1, S2,. Have been. Also, since this analog switch usually shows an on-resistance of about several hundred ohms, in order to correct this resistance value, a serial type EE in which an initial resistance value is factory-written
A PROM 22 is provided. The on / off of these analog switches and the reading of the corresponding EEPROM data are performed by a local controller (LCT) provided at the site by communication with a host computer in the maintenance office.
This is performed by a command from the CPU 23 in R). The read line information such as the core specific code is transferred from the LCTR to the host computer via a dedicated communication line. In this way, the unique code of the optical cable connected to the connector on the printed circuit board is read through the LCTR, and the connection status of the optical cable from the office to the subscriber can be grasped in real time.

[0008]

The writing setting of the memory is usually performed at the factory when the optical fiber with the connector is shipped. However, the connection relation of the optical cable is changed due to the renewal of the optical communication network and the construction of the track. In this case, it may be necessary to change the memory information of the optical connector while keeping the optical connection state. In such a case,
Conventionally, information stored in a memory has been changed by replacing a chip resistor mounted on a memory board with a resistor having a different resistance value locally. Therefore, the change of the stored information depends on the soldering work, and there is a problem that the working efficiency is poor. Also, the components such as chip resistors mounted on the memory board are extremely small, and it takes a considerable amount of skill to perform these soldering operations by hand. Sufficient reliability can be obtained if there is no qualified technology. However, there is a problem that it is very difficult to change the resistance without adversely affecting the optical connection state.

The present invention has been made in view of such a background, and it is easy to change the contents of memory on site without affecting the optical connection state, and the optical connector is highly reliable. It is intended to provide a memory module for use.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is a memory module which is mounted on an optical connector at an end of an optical cable and stores data unique to the optical cable. A storage means for storing the data, a memory board having a lead terminal for connecting the storage means to the outside, and a memory container which is fixed on a housing of the optical connector and houses the memory board, The memory container has a notch formed on one side surface, and a box-shaped storage portion capable of storing the memory substrate with at least some clearance in at least a direction in which the lead terminals are inserted. And a lid part to be fitted , wherein the notch is located above the memory container.
And the memory module is opened through this notch.
Make sure that the joule lead terminals protrude out of the memory container.
Features.

[0011]

According to the above configuration [action], memory board, in the holding section of the memory the container, it is housed somewhat kept Kano clearance to the insertion direction of at least the lead terminals, the teeth
The notch has a structure in which the notch is open above the memory container.
The lead terminals to the printed circuit board.
Even if the side edge of the memory board contacts the inner wall of the storage
With little effect on the optical connection end.
No.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a configuration of a memory module for an optical connector according to an embodiment of the present invention. Reference numeral 1 denotes a memory board for storing unique data such as identification information of an optical fiber or an optical cable, on which a diode D and chip resistors R1 and R2 are mounted. This memory board 1
All of the components mounted on the device are factory mounted, and all the mounting surfaces of the components are protectively coated with epoxy, silicon, or the like. Reference numeral 2 denotes a memory container that stores the memory substrate 1;
Reference numerals a and 2b denote a lid portion of the memory container 2 and a hollow box-shaped storage portion into which the lid portion is fitted. A pair of convex claws 11n and 12n are provided inside the lid 2a, while the connection side of the storage section 2b (the protruding side of the lead terminal).
On one side surface, a pair of notches 11s, 12s having a shape complementary to the claws 11n, 12n is formed from the upper edge. Then, the claws 11n, 12n and the notches 11s, 12s
Are combined to ensure a fitting state between the storage section 2b and the lid section 2a.

The notches 11s and 12s are provided with claws 11n and
12n is slightly longer than the lead terminals 11e, 1e of the memory substrate 1 when assembling the memory module.
2e passes through the windows between the tips of the claws 11n and 12n and the notches 11s and 12s, respectively. Next, at the time of connecting the optical connector, the memory board 1 is stored in the memory container 2b with some clearance maintained so that the memory board can be replaced without adversely affecting the optical connection state. ing. That is, in the case of the SC connector shown in FIG. 5, since the connection direction of the optical connector (the direction of the optical fiber) and the connection direction of the electric connector (the insertion direction of the lead terminal) match, when replacing the board, In order not to affect the optical connection state delicately due to connection vibration or the like, it is necessary that the memory board 1 be movable at least in the insertion direction of the lead terminal without hitting the inner wall of the storage section 2b. Clearance (gap) is required.

Although not shown, other types of optical / electrical connectors in which the electrical connector and the optical connector have different connection directions have the above-mentioned clearances to minimize the effect on the optical connection end. Needed. Furthermore,
If this clearance is provided not only in one direction but also over the entire periphery of the memory board, the replacement work of the memory board can be further stabilized.

With such a configuration, the site worker separates the lid 2a and the storage 2b constituting the memory container 2 and performs the work inside the construction when changing the connection relationship between the optical connector and the optical cable. Memory board 1 stored
Is replaced with another memory board prepared in advance in the factory and having different storage information, so that the memory board can be freely and easily replaced. Also, since the memory board 1 is housed and arranged with some clearance inside the memory container 2, at the time of connection of the connector, the memory board is pulled out of the printed board or the like on the system side and replaced with another memory board. This does not adversely affect the optical connection state.

[0016]

As described above, according to the present invention, there are provided storage means for storing data unique to an optical cable, which is mounted on an optical connector at the end of the optical cable, and lead terminals for connecting the storage means to the outside. In a memory module comprising a memory board having a memory board and a memory container for housing the memory board, which is fixed on a housing of the optical connector, the memory container has a cutout formed on one side and at least a lead terminal. It is composed of a hollow box-shaped storage part that can store the memory board with some clearance in the insertion direction, and a lid part that fits in this storage part. The memory board housed inside the memory container can be easily and freely replaced with another memory board having different stored information while maintaining the state. Therefore, the memory can be replaced without adversely affecting the optical communication during on-site work such as track construction, and the work efficiency at the site is significantly improved as well as the reliability of the optical communication line as compared with the related art. The effect of increasing is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a memory module for an optical connector according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a printed circuit board to which an optical connector is connected and an electrical configuration of a peripheral system thereof.

FIG. 3 is a diagram showing a memory configuration of an optical connector.

FIG. 4 is a plan view showing a mounting surface of a memory board mounted on the optical connector.

FIG. 5 is a diagram showing a cross section of an SC connector on which a memory module is mounted.

FIG. 6 is a plan view showing a printed circuit board on the system side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Memory board 2 Memory container 2a Lid 2b Storage 11e, 12e Lead terminal 11n, 12n Claw 11s, 12s Notch

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI H04B 10/135 10/14 (72) Inventor Fumio Otsuki 1-6-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation ( 56) References JP-A-4-174406 (JP, A)

Claims (1)

(57) [Claims] 1. A memory module mounted on an optical connector at an end of an optical cable and storing data unique to the optical cable, wherein the memory module is configured to store the data, and connect the storage means to the outside. And a memory container fixedly mounted on the housing of the optical connector and housing the memory substrate. On the other hand, the memory container has a cutout formed on one side surface. together it is, of constituting the memory substrate in at least the insertion direction somewhat retractable boxy maintains a Kano clearance of the lead terminal accommodating portion, a cover portion which is fitted on the housing part
The notch is opened upwardly of the memory container.
Through the notch , the lead end of the memory module
A memory module for an optical connector , wherein a child projects outside a memory container .