JP2006190584A - Transceiver interface conversion adapter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication apparatus having a slot for mounting a first (conventional) transceiver, capable of using a second (small-sized) transceiver. <P>SOLUTION: The communication apparatus 20 is provided with slots 21-1, 21-2 for first transceiver for inserting and mounting the first transceiver. The transceiver interface conversion adapter 40 has a dimension which can be inserted into the slots 21-1, 21-2 for the first transceiver. The second transceiver 32 can be inserted into and mounted on the transceiver interface conversion adapter 40. When the transceiver interface conversion adapter 40 on which the second transceiver 32 is mounted is inserted into the first slots 21-1, 21-2 of the communication apparatus 20, the second transceiver 32 is electrically connected to the communication apparatus 20 and bidirectional signal transmission through the transceiver interface conversion adapter 40 becomes possible. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transceiver interface conversion adapter. More specifically, a transceiver that can use the second transceiver (small transceiver) even in a communication device equipped with a first transceiver slot into which the first transceiver (conventional transceiver) can be inserted and mounted. This is a technology related to an interface conversion adapter.

  Conventionally, most of optical transmission / reception interfaces in communication devices are fixedly mounted on communication devices. For example, in the conventional communication device 10 shown in FIG. 1, the optical transmission / reception interfaces 11-1 and 11-2 are fixedly mounted.

  However, there are various types of communication optical transmission / reception interfaces. An optical transmission / reception interface having necessary specifications such as output light wavelength, light output power, and light receiving sensitivity is prepared. In the conventional communication device, only one kind of optical transmission / reception interface is mounted among the various types, and the use of the communication device is determined by the type of the optical transmission / reception interface mounted. Therefore, in the prior art, it has been impossible to mount other types of optical transmission / reception interfaces in order to use existing communication devices for other purposes.

In order to solve the above problems, technological progress was once seen. The communication device at this stage will be described with reference to FIG. The communication device 20 corresponding to the first transceiver shown in FIG. 2 has first transceiver slots (conventional transceiver slots) 21-1 and 21-2, and the optical transceiver interface is the first transceiver ( The conventional transceiver) can be exchanged in units of 22-1 and 22-2.
As a result, the same communication equipment can be used in various applications by arbitrarily selecting a transceiver with the required optical transmission / reception interface specifications according to the application, such as output light wavelength, light output power, and light reception sensitivity. became.

  Furthermore, in recent years, the above-described interchangeable transceiver has been reduced in size and weight. Accordingly, the number of communication devices 30 compatible with small transceivers (second transceivers) as shown in FIG. 3 has increased. The communication device 30 includes second transceiver slots (small transceiver slots) 31-1 to 31-4, and the second transceiver slots 31-1 to 31-4 are connected to the second transceiver. (Small transceiver) 32-1 to 32-4 are inserted and mounted. 33-1 to 33-N are a lineup of second transceivers (small transceivers).

  The small and light weight enables high-density mounting of optical transmission / reception interfaces, which increases the number of mounting and the number of small transceivers. Along with this, the price became cheap and the demand for small transceivers grew rapidly. With the increasing demand for small transceivers, the number of types of optical transmission / reception interfaces has been increasing (various lineups 33-1 to 33-N of the second transceiver in FIG. 3).

  Some small transceivers have specifications such as output wavelength, output power, and reception sensitivity that did not exist in conventional transceivers, and the use of one communication device 30 corresponding to the small transceiver shown in FIG. As compared with the conventional transceiver-compatible communication device 20 shown in FIG. In other words, in the communication device 30 shown in FIG. 3, by replacing the small transceiver to be mounted, it becomes possible to cope with various uses according to the small transceiver having various specifications.

  However, the conventional first transceivers 22-1 and 22-2 as shown in FIG. 2 and the second transceivers (small transceivers) 32-1 through 24-4 and 33-1 through as shown in FIG. 33-N has a different shape and is not compatible with each other, and most communication devices have slots corresponding to only one of them.

Conventional transceiver standard, SFF Committee SFF-8053 Specification for GBI (Gigabit Interface Converter) Rev 5.5 September 27, 2000 [online], [searched on January 13, 2004], Internet <URL: http://schelto.com/ tll_2 / GBIC / sff-8053.pdf> Small Transceiver Standard, Small Form-factor Pluggable (SFP) Transceiver Multi Source Agreement (MSA) [online], [searched on January 13, 2004], Internet <URL: http://schelto.com/SFP/SFP%20MSA .pdf>

  Small and lightweight transceivers have become widespread, and communication devices are also increasing in communication devices compatible with small transceivers as shown in FIG. 3. However, communication devices equipped with slots for conventional transceivers as shown in FIG. 2 are also sufficient. There are many devices that are still in operation.

  In the case of changing the interface type in a communication device compatible with a conventional transceiver, it can be changed by preparing a new type of transceiver. However, at the present time when the market for pluggable optical transceiver modules is shifting from conventional transceivers to smaller and lighter transceivers, there are few interface types for conventional transceivers. In addition, the lineup of small transceivers, for which demand has increased and the market has been sufficiently formed, has become rich, and the lineup of products is increasing even now (the second transceiver in FIG. 3 and FIG. 4 described later). Various lineups 33-1 to 33-N).

  In addition, small transceivers can be mounted at high density due to their small size, and because they are manufactured with common specifications as shown in Non-Patent Document 2, the price has also been lower than conventional transceivers. Demand is gradually increasing.

  In such a situation, there is an increasing demand from communication device users to use a small transceiver as an optical transceiver module. However, as in Non-Patent Document 1 and Non-Patent Document 2, the standards of conventional transceivers and small transceivers are different, and there is no compatibility in terms of their shape. It is impossible to implement and use at present.

  The conventional transceiver is also detachable and has a size that can be easily carried. Although the size of the transceiver is smaller than that of the conventional transceiver, there is almost no dimensional margin for inserting and mounting the small transceiver in the casing of the conventional transceiver size.

  Further, in a general case, a detachable transceiver-compatible communication device is provided with a cage for inserting a transceiver, and a conventional transceiver and a small transceiver are inserted into the cage. However, in addition to the pins for mounting on the board projecting from the cage, the pins from the connector part also project when a connector that is an interface with the transceiver is mounted.

  Therefore, it is very difficult to construct the cage for a small transceiver in an adapter having a shape similar to that of the conventional transceiver body. However, if the small transceiver protrudes more than necessary from the adapter body, the adapter part protrudes from the communication device, and the small transceiver also protrudes, resulting in a very uncomfortable use state. End up.

  In view of the above-described situation, the present invention accommodates a small transceiver in a conventional transceiver-shaped adapter so that a smaller transceiver can be used in the communication device 20 corresponding to the conventional transceiver as shown in FIG. An object of the present invention is to provide a transceiver interface conversion adapter.

The configuration of the present invention that solves the above-described problem uses a second transceiver that is smaller than the first transceiver in a communication device having a first transceiver slot into which the first transceiver can be inserted and mounted. A transceiver interface conversion adapter that is inserted and installed in the first transceiver slot to enable
A first electrical interface that is electrically connected to an electrical interface provided in the first transceiver slot when the transceiver interface conversion adapter is inserted and installed in the first transceiver slot;
A storage space in which the second transceiver can be inserted and mounted;
A second electrical interface that is electrically connected to an electrical interface provided in the second transceiver when the second transceiver is inserted and mounted in the accommodation space;
It has a circuit board which electrically connects the 1st electric interface and the 2nd electric interface, It is characterized by the above-mentioned.

In addition, the configuration of the present invention makes it possible to use a second transceiver that is smaller than the first transceiver in a communication device having a first transceiver slot into which the first transceiver can be inserted and mounted. A transceiver interface conversion adapter which is inserted into and installed in the first transceiver slot,
When the transceiver interface conversion adapter is inserted and attached to the first transceiver slot, an insertion portion inserted into the first transceiver slot and an insertion guide portion located outside the first transceiver slot are provided. As well as
A first electrical interface that is electrically connected to an electrical interface provided in the first transceiver slot when the transceiver interface conversion adapter is inserted and installed in the first transceiver slot;
A storage space in which the second transceiver can be inserted and mounted from the insertion guide portion to the insertion portion;
A second electrical interface that is electrically connected to an electrical interface provided in the second transceiver when the second transceiver is inserted and mounted in the accommodation space;
A circuit board that electrically connects each pin of the first electrical interface and each pin of the second electrical interface in the same electrical function;
It has a hollow part which is formed in a part of the upper part of the insertion part and communicates with the accommodation space.

  Further, in the configuration of the present invention, a portion of the accommodation space formed in the insertion guide portion is a through hole that contacts a peripheral surface of the second transceiver inserted into the accommodation space. And

  In the configuration of the present invention, the upper surface of the outer surface of the insertion portion and the upper surface of the second transceiver that is inserted and mounted in the accommodation space and exposed from the hollow portion are at the same height position in the height direction. It is characterized by becoming.

  Further, the configuration of the present invention includes an insertion guide portion lower inner wall surface that is a bottom surface of a portion formed in the insertion guide portion of the accommodation space, and an insertion that is a bottom surface of a portion formed in the insertion portion of the accommodation space. The inner wall surface of the lower part and the upper surface of the circuit board are at the same height position in the height direction.

  More specifically, in the present invention, in order to solve the above-mentioned problem, a technique for producing an adapter having a structure capable of accommodating a smaller transceiver is used for an adapter having the shape of a conventional transceiver that is inherently small. There are features.

  In other words, when the conventional transceiver is the first transceiver and the transceiver smaller than the first transceiver is the second transceiver, the electrical connection is established with the communication device including the first transceiver slot. By inserting an adapter having a second electrical interface for electrical connection between the first electrical interface and the second transceiver into the first transceiver slot of the communication device, the second transceiver And a communication device including the first transceiver slot and the first transceiver slot are electrically connected.

  In addition, in an adapter comprising an insertion guide portion for inserting the second transceiver and an insertion portion inserted into the first transceiver slot, as in the hollow portion 66 in FIGS. A portion of the upper portion of the insertion portion into the conventional transceiver slot is hollow, and the upper surface of the small transceiver when the small transceiver is inserted and the outer surface of the insertion portion of the transceiver interface conversion adapter according to the present invention (73 in FIG. 7) The structural problem is solved by locating at the same height.

  When the hollow portion is provided as described herein, the small transceiver is mounted in an unstable state unless any holding function is provided. Therefore, since the portion (insertion guide portion) that is not accommodated in the first transceiver slot of the communication device and does not depend on the size of the slot does not depend on the size of the slot, in this transceiver interface conversion adapter, both in the height direction and in the width direction. The inner wall surface in the height direction and the width direction (that is, the penetration formed by these inner wall surfaces) can be provided with a thickness sufficient to hold the second transceiver without reducing the size. A stable holding is possible by having an insertion guide portion having a hole. That is, the inner wall surface of the through hole is in intimate contact with the peripheral surface of the second transceiver and stably holds the second transceiver.

  In FIG. 7, the upper surface of the second transceiver 32 is located at the same height as the insertion portion outer surface upper surface 73 and the insertion guide portion upper inner wall surface 75. Here, since the purpose of the insertion guide portion 62 is to enable the second transceiver 32 to be stably held, the inner wall surface size of the insertion guide portion 62 is the size of the small transceiver accommodating portion in the cage of the small transceiver. It is designed so that a small transceiver can be smoothly inserted and removed and is stably held after insertion.

  By having the above structure, the dimension in the height direction can be reduced at the upper part of the adapter.

  However, it is essential to install a circuit board 65 for mounting the second interface connector 64 connected to the second transceiver at the lower part of the transceiver interface conversion adapter 40. Further ingenuity is necessary.

  As shown in FIG. 7, the lower wall of the transceiver interface conversion adapter housing is made as thin as possible, and is not more than the thickness of the circuit board 65. Furthermore, the circuit board upper surface 71 is located at the same height as the insertion portion lower inner wall surface 74, so that the size reduction in the height direction is also realized at the lower portion of the adapter. Here, in order to stably hold the second transceiver by the insertion guide portion, the circuit board upper surface 71, the insertion portion lower inner wall surface 74, and the insertion guide portion lower inner wall surface 76 have the same height.

  With the transceiver interface conversion adapter having the above-described features, the second transceiver can be used in the communication device compatible with the first type of conventional transceiver. Furthermore, the second transceiver can be accommodated in the adapter having the first transceiver shape, and the conventional communication device can be used without the adapter and the second transceiver projecting more than necessary from the communication device.

  As shown in FIG. 4, both the GBIC (Gigabit Interface Converter: see Non-Patent Document 1) and SFP (Small Form Factor Pluggable: see Non-Patent Document 2) are both small and pluggable types by the transceiver interface conversion adapter of the present invention. It is possible to connect and use the optical transceiver module. Since the SFP can be housed and used in an adapter with the same shape as the GBIC, which is a conventional optical transceiver module, the optical transceiver module does not protrude more than necessary from the appearance of the communication equipment normally used. The communication device can be used without a sense of incongruity.

  Further, by using the transceiver interface conversion adapter of the present invention, it is possible to use an SFP, which is an optical transceiver module that is smaller, cheaper, and rich in variations than the GBIC, in a conventional type communication device having a GBIC slot. . As a result, it is possible to construct a network using SFP having various variations without renewing the GBIC-compatible communication equipment that has been operating in the past, so that the network usage form of the user is greatly expanded.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the code | symbol of the common part in each drawing has provided the same code | symbol.

  FIG. 1 is an initial diagram of prior art communication devices. The optical transmission / reception interfaces 11-1 and 11-2 of the communication device 10 are fixedly mounted, and it is impossible to exchange only the optical transmission / reception interfaces 11-1 and 11-2.

  FIG. 2 is also a communication device of the prior art, but is a development of the communication device of FIG. The communication device 20 includes first transceiver slots 21-1 and 21-2. By inserting and attaching the first transceivers 22-1 and 22-2 to the first transceiver slots 21-1 and 21-2, the first transceivers 22-1 and 22-2 are connected to the communication device 20. Functions as an optical transmission / reception interface. When applied to a conventional communication system, the first transceivers 22-1 and 22-2 are GBICs (Gigabit Interface Converter), and the communication device 20 can be used in various applications by arbitrarily selecting the GBIC according to the application. Can be used.

  FIG. 3 shows a communication device 30 compatible with the latest small transceiver (second transceiver). The communication device 30 has second transceiver slots 31-1 to 31-4. By inserting the second transceivers 32-1 to 32-4 into the second transceiver slots 31-1 to 31-4, the second transceivers 32-1 to 32-4 become optical transmission / reception interfaces of the communication device 30. Function as. When applied to the latest communication system, the second transceivers 32-1 to 32-4 are SFP (Small Form Factor Pluggable), and various lineups 33-1 to 33 of the second transceiver having various optical transmission / reception interface types. By arbitrarily selecting −N according to the application, the communication device 30 can be used in various applications.

  Here, the second transceiver (SFP) 32-1 to 32-4, the various lineups 33-1 to 33-N of the second transceiver are more than the first transceiver (GBIC) 22-1 and 22-2. It is small and has a volume ratio of about 1/4. For this reason, the second transceiver (SFP) can be mounted at high density and is mass-produced. Therefore, the demand is increasing due to lower prices. Along with this, various lineups of specifications such as output light wavelength, output light power, and light receiving sensitivity of an optical transmission / reception interface have been provided.

  FIG. 4 is a diagram illustrating a usage example of the transceiver interface conversion adapter 40 according to the embodiment of the present invention. The second transceiver is connected to the first transceiver slot 21-1 or the first transceiver slot 21-2 of the communication device 20 corresponding to the first transceiver that has been conventionally used via the transceiver interface conversion adapter 40. 32 is inserted. Thereby, in the communication device 20 corresponding to the first transceiver, the second transceiver 32 functions as an optical transmission / reception interface.

  When applied to the current communication system, the second transceiver (SFP) 32 can be used in the GBIC-compatible communication device 20 by using the transceiver interface conversion adapter 40. As a result, in the GBIC compatible communication device, in addition to the interface type lineup in the conventional GBIC, the various lineups 33-1 to 33-N of the second transceiver having various specification types can be used. The interface type will increase significantly.

  FIG. 5 is a diagram showing the definition of directions in explaining the transceiver interface conversion adapter 40 according to the present invention. The direction in which the second transceiver 32 is inserted into the transceiver interface conversion adapter 40 is defined as “depth direction”, the direction perpendicular to the ground is defined as “height direction”, and the direction parallel to the ground is defined as “width direction”. . Furthermore, the direction viewed from the front of the insertion slot into which the second transceiver 32 is inserted is C, and the direction viewed from the opposite direction is D. Furthermore, the directions viewed from the direction perpendicular to them are assumed to be A and B as shown in FIG.

  FIG. 5 shows the direction and the like, and does not show the shape and structure of the transceiver interface conversion adapter 40 accurately. A specific example of the shape and structure of the transceiver interface conversion adapter 40 will be described with reference to FIGS.

6 is a diagram (plan view) of the transceiver interface conversion adapter 40 as viewed from the direction A shown in FIG. FIG. 6A is a diagram when the second transceiver is not inserted, and FIG. 6B is a diagram when the second transceiver is inserted and mounted.
7 is a view of the transceiver interface conversion adapter 40 as seen from the direction B shown in FIG. FIG. 7A is a diagram when the second transceiver is not inserted, and FIG. 7B is a diagram when the second transceiver is inserted.

  Hereinafter, in order to facilitate understanding, the outline of the transceiver interface conversion adapter 40 will be described first, and then the detailed structure of each part of the transceiver interface conversion adapter 40 will be described with reference to the drawings.

[General configuration description]
As shown in FIG. 4, the transceiver interface conversion adapter 40 is inserted and mounted in the first transceiver slot 21 of the communication device 20 in a state where the second transceiver (small transceiver) 32 is inserted and mounted. The In this way, the transceiver interface conversion adapter 40 makes electrical connection between the communication device 20 and the second transceiver 32, and the second transceiver (small transceiver) 32 is also used in the conventional communication device 20. Can be used.

  As shown in FIGS. 6 and 7, the transceiver interface conversion adapter 40 includes an insertion portion 61 inserted into the first transceiver slot 21 when inserted into the first transceiver slot 21, An insertion guide portion 62 located outside the transceiver slot 21 is provided. The insertion portion 61 has an outer dimension that can be tightly inserted into the first transceiver slot 21, and the insertion guide portion 62 is thicker than the first transceiver slot 21 in the height direction. (See FIG. 8).

  In the transceiver interface conversion adapter 40, an accommodation space 90 formed from the insertion guide portion 62 to the insertion portion 61 is formed. The storage space 90 has a size and shape that allows the second transceiver 32 to be inserted and mounted tightly.

  A portion of the accommodation space 90 formed in the insertion guide portion 62 is surrounded by a through hole formed by upper and lower inner wall surfaces 75 and 76 and left and right inner wall surfaces 67 and 67. The inner peripheral surface (inner wall surface) of the through hole is in close contact with the peripheral surface of the second transceiver 32 inserted into the accommodation space 90, and is inserted into and attached to the transceiver interface conversion adapter 40. The transceiver 32 is stably held and accommodated.

  A hollow portion 66 is formed in a part of the upper surface of the insertion portion 61 so as to communicate with the accommodation space 90.

  The insertion portion 61 of the transceiver interface conversion adapter 40 includes a first electrical interface 63, a second electrical interface 64, and a circuit board 65 that electrically connects the electrical interfaces 63 and 64.

The first electrical interface 63 is electrically connected to the electrical interface provided in the first transceiver slot 21 when the transceiver interface conversion adapter 40 is inserted into and installed in the first transceiver slot 21. It is.
The second electrical interface 64 is electrically connected to the electrical interface provided in the second transceiver 32 when the second transceiver 32 is inserted and mounted in the storage space 90.
The circuit board 65 electrically connects the pins of the first electrical interface 63 and the pins of the second electrical interface 64 with the same electrical function, and matches the signal potential while maintaining the signal potential. It has a function to transmit.

[Detailed structure description]
6 is a diagram (plan view) of the transceiver interface conversion adapter 40 as viewed from the direction A shown in FIG. FIG. 6A is a diagram when the second transceiver is not inserted, and FIG. 6B is a diagram when the second transceiver 32 is inserted and mounted.

  As shown in FIG. 6, a part (a part of the upper surface) of the insertion part 61 of the transceiver interface conversion adapter 40 accommodated in the first transceiver slots 21-1 and 21-2 of the communication device 20 is a hollow part. 66. For this reason, when the second transceiver 32 is inserted and attached to the transceiver interface conversion adapter 40, the inserted and attached second transceiver 32 is visible from the hollow portion 66. As a result, the type of the second transceiver 32 inserted into the transceiver interface conversion adapter 40 can be confirmed.

  When the transceiver interface conversion adapter 40 is inserted into the first transceiver slot 21-1 (or 21-2) of the communication device 20, the portion of the transceiver interface conversion adapter 40 that protrudes outside the communication device 20 is inserted into the insertion guide. Part 62. The insertion guide portion 62 functions as a guide when the second transceiver 32 is inserted into the transceiver interface conversion adapter 40. That is, the inner wall surface (horizontal) 67 of the insertion guide portion forms the same surface as the inner wall surface (horizontal) 68 of the insertion portion, and serves as a guide when the second transceiver 32 is inserted.

  The transceiver interface conversion adapter 40 includes a first electrical interface 63 and a second electrical interface 64, and both electrical interfaces 63 and 64 are electrically connected via a circuit board 65. The first electrical interface 63 is connected to the electrical interface provided in the communication device 20, and the second electrical interface 64 is provided in the second transceiver 32 inserted into the transceiver interface conversion adapter 40. It is connected to the electrical interface.

  The circuit board 65 electrically connects the pins of the first electrical interface 63 and the pins of the second electrical interface 64 having the same electrical function. In addition, the signal voltage is adjusted and bidirectional signal transmission is performed.

  Therefore, when the second transceiver 32 is inserted into the transceiver interface conversion adapter 40 from the transceiver insertion port 69, the electrical interface of the second transceiver 32 is connected to the second electrical interface 64, and the circuit board 65 And is electrically connected to the first electrical interface 63.

  FIG. 7 is a view of the transceiver interface conversion adapter 40 as seen from the direction B shown in FIG. FIG. 7A is a diagram when the second transceiver is not inserted, and FIG. 7B is a diagram when the second transceiver 32 is inserted.

  As shown in FIG. 7, a part of the upper portion of the insertion portion 61 is a hollow portion 66. When the second transceiver 32 is inserted into the transceiver interface conversion adapter 40 via the insertion port 69, the upper surface of the second transceiver 32 is flush with the upper inner wall surface 75 of the insertion guide portion and the outer upper surface 73 of the insertion portion. Will be located. By adopting such a structure, the dimension in the height direction at the upper part of the transceiver interface conversion adapter 40 is reduced.

  Further, the lower inner wall surface 76 of the insertion guide portion is located on the same plane as the lower inner wall surface 74 of the insertion portion and the circuit board upper surface 71 of the circuit board 65, and when the second transceiver 32 is inserted, the second transceiver 32 is inserted. 32 becomes an insertion guide on the lower surface. Moreover, the lower wall of the transceiver interface conversion adapter 40 is made as thin as possible. By adopting such a structure, the dimension in the height direction at the lower part of the transceiver interface conversion adapter 40 is reduced. In FIG. 7, reference numeral 72 denotes an upper wall surface of the insertion portion.

  When the second transceiver 32 is inserted into the accommodating space 90 of the transceiver interface conversion adapter 40, the electrical interface of the second transceiver 32 is connected to the second electrical interface 64, and is connected to the second transceiver interface 64 via the circuit board 65. 1 is electrically connected to one electrical interface 63.

  The transceiver interface conversion adapter 40 also includes an insertion guide groove 77 that serves as a guide when the transceiver interface conversion adapter 40 is inserted into the first transceiver slot 21-1 (21-2) of the communication device 20. ing. In addition, a holding portion 78 and a knob 78 at the time of removal are provided when inserted into the first transceiver slot 21-1 (21-2) of the communication device 20.

  FIG. 8 is a view of the transceiver interface conversion adapter 40 as seen from the direction C shown in FIG. FIG. 8A is a diagram when the second transceiver is not inserted, and FIG. 8B is a diagram when the second transceiver 32 is inserted.

In appearance, the insertion portion 61 is larger than the insertion guide portion 62 in the width direction, and the insertion guide portion 62 is larger than the insertion portion 61 in the height direction. The insertion guide part upper inner wall surface 75 and the insertion guide part lower inner wall surface 76 that can be seen from the insertion port 69 into which the second transceiver 32 is inserted serve as a guide when the second transceiver 32 is inserted.
Reference numeral 81 denotes an optical transmission port of the second transceiver 32, and 82 denotes an optical reception port of the second transceiver 32.

  FIG. 9 is a view of the transceiver interface conversion adapter 40 as viewed from the direction D shown in FIG. The transceiver interface conversion adapter 40 is viewed from the first transceiver slot 21-1 (21-2) side of the communication device 20, and 63 is a first electrical interface.

  As described in FIGS. 2, 3 and 4, when the present invention is applied to the conventional communication device 20 and the communication system, the first transceiver described so far is “GBIC” which is a conventional optical transmission / reception interface. (Gigabit Interface Converter) ”(see Non-Patent Document 1), and the second transceiver is replaced with“ SFP (Small Form Factor Pluggable) ”(see Non-Patent Document 2), which is a compact optical transmission / reception interface. Can be provided.

  Hereinafter, an embodiment in which the first transceiver is a GBIC and the second transceiver is an SFP will be described.

  According to Non-Patent Document 1, in the first transceiver (GBIC) 22, the external dimension in the height direction shown in FIG. 5 is defined as 10.00 mm (−0.15 to +0.10). On the other hand, according to Non-Patent Document 2, the height dimension of the cage mounted on the SFP-compatible communication device 30 as a slot for inserting the second transceiver (SFP) 32 is 9.8 mm (Maximum). The minimum dimensional allowance for inserting a small transceiver insertion cage into a conventional transceiver size adapter is only 0.05mm.

  Further, the cage that is commonly specified in Non-Patent Document 2 has a pin for mounting on the board protruding, and when a connector that is an interface with a small transceiver is mounted, the pin from this connector portion is mounted. Will also protrude. Therefore, it is impossible to construct this transceiver interface conversion adapter by mounting the above-specified common cage for SFP.

  Therefore, by adopting the structure as described in each claim, the SFP is accommodated in the transceiver interface conversion adapter 40 having the same appearance as that of the GBIC, and the SFP electrical interface is converted into the GBIC electrical interface to support the GBIC. The communication device 20 can use the SFP via the transceiver interface conversion adapter 40. Further, even when inserted in the communication device 20, it can be used without protruding from the communication device more than necessary.

  Actually, an electrical interface conversion adapter for SFP and GBIC was created. An embodiment of an SFP-GBIC conversion adapter will be described in detail based on drawings referred to at the time of design and operation verification results.

  FIG. 10A shows the pin layout of the GBIC electrical interface defined in GBIC MSA (Non-Patent Document 1). The GBIC has 20 pins as an electrical interface, and functions as shown in the table of FIG.

  FIG. 11A shows the pin arrangement of the SFP electrical interface defined in the SFP MSA (Non-Patent Document 2). SFP also has 20 pins as an electrical interface, and each is assigned a function as shown in the table of FIG.

  Here, as is apparent from the table shown in FIG. 12, the pin arrangement of the GBIC and the pin arrangement of the SFP are completely different. Therefore, as shown in the table, electrical connection can be achieved by matching the pins and connecting them.

  The drive voltage of GBIC is specified as 4.75 to 5.25V (maximum 6V), the drive voltage of SFP is specified as 3.3V ± 5%, and the supply voltage is different. The SFP-GBIC adapter is intended to use SFP via the adapter in GBIC compatible communication equipment. In this case, a voltage of 4.75 to 5.25 V (maximum 6 V) is supplied to the adapter from the GBIC slot of the communication device. If this voltage is passed through the adapter and supplied to the SFP, the SFP may be destroyed. For this reason, the adapter needs to have a voltage conversion function to 3.3V. In the transceiver interface conversion adapter 40, a voltage converter is mounted on the circuit board 65.

  FIG. 13 shows an outline of the drawing of the SFP-GBIC adapter as a reference.

  FIG. 14A and FIG. 14B show the operation verification results when the created SFP-GBIC adapter is actually used and Ethernet (registered trademark) signals are transmitted and received.

  The SFP "ATR-55301 (1610nm)" manufactured by NTT-AT was selected as the optical transmission / reception interface, and it was inserted into this transceiver interface conversion adapter and accommodated. And this transceiver interface conversion adapter containing SFP was inserted into the GBIC slot of Spirent's Smart Bits, which is a data transmission / reception tester for Ethernet signals. In addition, the SFP Tx port and the variable attenuator In port were connected by a single mode fiber, and the variable attenuator Out port and the SFP Rx port were connected by a single mode fiber. This is a loopback configuration in which the signal from Smart Bits returns to Smart Bits.

  FIG. 15 shows an outline of the signal flow. An Ethernet electrical signal generated in Smart Bits is input to the adapter via the first electrical interface of the adapter, and input from the adapter to the SFP via the second electrical interface. So far all are electrical signals. In the SFP, which is an optical transceiver, an electrical signal is converted into an optical signal, and the optical signal is transmitted from the SFP optical transmission port. The optical signal transmitted from the SFP is received by the SFP optical reception port via the variable attenuator, and is converted again into an electrical signal in the SFP. The signal converted into the electrical signal is input to the adapter via the second electrical interface of the adapter. Furthermore, it is communicated from the adapter to Smart Bits via the first electrical interface.

In such a verification configuration, the value of the variable attenuator is changed, and the result of measurement of the frame error rate when the reception level at the SFP optical reception port is changed is shown in FIG.
It is published in. Signal transmission conditions from Smart Bits were transmission frame length: 64 bytes, transmission rate: 1,488,095 frames / sec, and signal transmission / reception was performed at a wire rate of 1 Gigabit Ethernet. Two adapters were measured, and the measurement data is plotted on the graph as “Serial-01” and “Serial-02”.

Looking at the measurement results, the reception level at an error rate of 10 ⁻¹² can be realized to be −31 dBm or less in any adapter. This is because the reception level specification value of the used SFP is -30dBm (Max.) (Http://keytech.ntt-at.co.jp/optic1/prd_1033.html) [Search January 13, 2004] Satisfactory results were obtained. As a result, it was found that there was no deterioration in communication quality due to this transceiver interface conversion adapter, and it could be fully utilized for normal Gigabit Ether data communication.

  In this embodiment, SFP and GBIC are taken up as transceivers. However, other transceivers such as XFP do not change the gist of the present invention.

  SFP modules, which are becoming mainstream as gigabit-class optical transceiver interface modules, can be used not only in communication devices with SFP slots but also in gigabit-class communication devices with conventional GBIC slots. Can be effectively used without renewing the communication equipment.

  In addition, SFP is smaller than GBIC and demand is increasing. Because MSA is standardized and demand is high, mass production is proceeding and the price is also lower than GBIC, and users can use the existing GBIC-type communication equipment more economically. You can change it.

  Furthermore, in addition to general types of products such as 1000BASE-SX / LX, the SFP product lineup includes one-core communication SFP and CWDM compatible products. By selecting the optimum SFP from the abundant variations according to the application form, the variation of network construction for users will be expanded.

It is a perspective view which shows the communication apparatus of a prior art. It is a perspective view which shows the communication apparatus of the prior art corresponding to a conventional type transceiver. It is a perspective view which shows the communication apparatus corresponding to a small transceiver. It is a perspective view which shows the usage example of the transceiver interface conversion adapter of this invention. [FIG. 6] It is explanatory drawing which shows the definition of the direction shown in [FIG. 9]. FIGS. 6A and 6B are configuration diagrams of the transceiver interface conversion adapter according to the present invention as viewed from the direction A. FIG. 6A shows a state when no transceiver is inserted, and FIG. 6B shows a state when the transceiver is inserted. FIGS. 7A and 7B are configuration diagrams of the transceiver interface conversion adapter according to the present invention as viewed from the direction B. FIG. 7A shows a state when no transceiver is inserted, and FIG. 7B shows a state when the transceiver is inserted. FIGS. 8A and 8B are views of the transceiver interface conversion adapter according to the present invention as viewed from the direction C. FIG. 8A shows a state when no transceiver is inserted, and FIG. 8B shows a state when the transceiver is inserted. It is the block diagram which looked at the transceiver interface conversion adapter of this invention from the D direction. It is a perspective view which shows pin arrangement | positioning of the electrical interface of GBIC. It is explanatory drawing which shows the function of the pin of the electrical interface of GBIC. It is a perspective view which shows pin arrangement | positioning of the electrical interface of SFP. It is explanatory drawing which shows the function of the pin of the electrical interface of SFP. It is a pin wiring correspondence table of SFP-GBIC. It is a drawing at the time of SFP-GBIC adapter creation. It is a block diagram which shows the operation verification result of an SFP-GBIC adapter. It is a characteristic view which shows the operation verification result of an SFP-GBIC adapter. It is explanatory drawing which shows the flow of the signal at the time of data transfer verification.

Explanation of symbols

10 Prior art communication equipment
11-1 to 11-2 Fixed optical transmission / reception interface
20 Communication equipment compatible with the first transceiver
21-1 to 21-2 First transceiver slot (conventional transceiver slot)
22-1 to 22-2 First transceiver (conventional transceiver)
30 Communication equipment compatible with the second transceiver
31-1 to 31-4 Second transceiver slot (small transceiver slot)
32-1 to 32-4 Second transceiver (small transceiver)
33-1 to 33-N Lineup of second transceivers
40 Transceiver interface conversion adapter (product of the present invention)
61 Insertion
62 Insertion guide
63 First electrical interface
64 Second electrical interface
65 Circuit board
66 Hollow part
67 Insertion guide inner wall (horizontal)
68 Inner wall surface (horizontal)
69 Slot for second transceiver
71 Top of circuit board
72 Upper inner wall of the insertion section
73 Upper surface of insertion section
74 Lower inner wall of the insertion section
75 Inner inner wall of insertion guide
76 Lower inner wall of insertion guide
77 Insertion guide groove into first transceiver slot
78 Knob for holding and taking out the first transceiver slot
81 Optical transceiver port of second transceiver
82 Optical transceiver port of second transceiver
90 containment space

Claims (5)

In order to enable the use of a second transceiver that is smaller than the first transceiver in a communication device having a slot for the first transceiver into which the first transceiver can be inserted and mounted, the first transceiver is used. A transceiver interface conversion adapter that is inserted into and installed in a slot,
A first electrical interface that is electrically connected to an electrical interface provided in the first transceiver slot when the transceiver interface conversion adapter is inserted and installed in the first transceiver slot;
A storage space in which the second transceiver can be inserted and mounted;
A second electrical interface that is electrically connected to an electrical interface provided in the second transceiver when the second transceiver is inserted and mounted in the accommodation space;
A transceiver interface conversion adapter comprising: a circuit board that electrically connects the first electrical interface and the second electrical interface. In order to enable the use of a second transceiver that is smaller than the first transceiver in a communication device having a slot for the first transceiver into which the first transceiver can be inserted and mounted, the first transceiver is used. A transceiver interface conversion adapter that is inserted into and installed in a slot,
When the transceiver interface conversion adapter is inserted and attached to the first transceiver slot, an insertion portion inserted into the first transceiver slot and an insertion guide portion located outside the first transceiver slot are provided. As well as
A first electrical interface that is electrically connected to an electrical interface provided in the first transceiver slot when the transceiver interface conversion adapter is inserted and installed in the first transceiver slot;
A storage space in which the second transceiver can be inserted and mounted from the insertion guide portion to the insertion portion;
A second electrical interface that is electrically connected to an electrical interface provided in the second transceiver when the second transceiver is inserted and mounted in the accommodation space;
A circuit board that electrically connects each pin of the first electrical interface and each pin of the second electrical interface in the same electrical function;
A transceiver interface conversion adapter, comprising: a hollow portion formed in a part of an upper portion of the insertion portion and communicating with the accommodation space. In claim 2,
The transceiver interface conversion adapter, wherein a portion of the accommodation space formed in the insertion guide portion is a through-hole that contacts a peripheral surface of a second transceiver inserted into the accommodation space. In claim 2 or claim 3,
The outer surface upper surface of the insertion portion and the upper surface of the second transceiver that is inserted and mounted in the housing space and exposed from the hollow portion are at the same height position in the height direction. Transceiver interface conversion adapter. In any one of Claims 2 thru | or 4,
The insertion guide portion lower inner wall surface which is the bottom surface of the portion formed in the insertion guide portion of the accommodation space, the insertion portion lower inner wall surface which is the bottom surface of the portion formed in the insertion portion of the accommodation space, and the circuit A transceiver interface conversion adapter, wherein the upper surface of the substrate is at the same height position in the height direction.