JPH1013448A - Optical communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To flexibly construct various applications. SOLUTION: This optical communication equipment 40 has multiple interface parts at the back. The optical communication equipment 40 solely constructs the terminal station equipment 70 of a four nodes/two fibers BLSR system. The two optical communication equipments 40 are fitted in arrangement where they are vertically overlapped. Then, they are suitably connected by a shielding cable 160 at the back side. Thus, the terminal equipment 50 of a four nodes/four fibers bidirectional line switched ring(BLSR) system is constructed. Then, an equipment 60 for repeating is constructed when the shielding cable 160 is connected at a different mode.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical communication device,
In particular, the present invention relates to an optical communication device installed in each station of a network using optical fibers. At present, an optical fiber network has four nodes and two fibers BL shown in FIG.
SR (Bidirectional Line Swithed Ring) System 10
Is the mainstream. Each station 11 is connected by two optical fibers 12. The two optical fibers 12 include one working optical fiber WK and one spare optical fiber P. The system 10 provides a rescue function for an accident where the optical fiber 12 is cut at one place, but a rescue function for a double injury accident where the optical fiber is cut at two places between different offices. Does not work, making optical communication impossible. Therefore, in the future, a four-node, four-fiber BLS shown in FIG.
The R system 20 tends to be constructed.

[0002] In this system 20, four optical fibers (consisting of two working optical fibers WK1 and WK2 and two spare optical fibers P1 and P2) are arranged at each station.
, Are connected in a ring shape. Here, it is assumed that one working optical fiber WK1 is erroneously cut between itself and a station, as indicated by reference numeral a in FIG. In this case, the line switch (receiving end)
Thus, the cut working optical fiber WK1 is switched to the spare optical fiber P1 to be relieved. FIG.
(B), as shown by a symbol b, 4
It is assumed that all the optical fibers WK1, WK2, P1, and P2 are cut by mistake. In this case, one working optical fiber WK1 is automatically switched to one spare optical fiber P1 by loopback (→→→), and the other working optical fiber WK2 is looped back (→ →→
) Automatically switches to another spare optical fiber P2, and all signals are rescued.

At present, the signal transmission speed is several Gb.
sp (for example, 2.4 Gbsp), but it is expected that the speed will be increased to 10 Gbsp in the future.

[0004]

FIG. 36 shows a four-node, two-fiber BLS.
Terminal device 3 installed in station 11 of R system 10
0 is a block diagram of FIG. The terminal device 30 includes the line switching unit 3
1 and a reception signal processing unit 3 for processing the reception signal on the right side in the figure.
2 and a transmission signal processing unit 33 for processing transmission signals, a reception signal processing unit 34 and a transmission signal processing unit 35 on the left side of the line switching unit 31.
In this configuration, the line switching unit 31 switches and connects the left and right reception signal processing units and the transmission signal processing units as necessary.

[0005]

The terminal station device 30 comprises:
The four-node, four-fiber BLSR shown in FIG.
It is not applicable to the system 20. Therefore, the user who purchased the terminal device 30 has four nodes in the system,
When switching to the 4-fiber BLSR system 20,
The terminal device 30 needs to be discarded, and the terminal device 30 suitable for the system 20 needs to be purchased again, which imposes a large economic burden.

Accordingly, an object of the present invention is to provide an optical communication device which has solved the above-mentioned problems.

[0007]

According to a first aspect of the present invention, there is provided a reception signal processing section for processing a reception signal, a transmission signal processing section for processing a transmission signal, the reception signal processing section and the transmission signal processing section. An optical communication device installed in a network station using an optical fiber, wherein the reception signal processing unit is partially provided as a reception signal processing interface unit for network configuration. Wherein the transmission signal processing section has a transmission signal processing interface section for network configuration in a part thereof, and the line switching section has a line switching interface section for network configuration in a part thereof. And a cable connection between the reception signal processing interface unit, the transmission signal processing interface unit, and the line switching interface unit. A.

According to a second aspect of the present invention, there is provided a reception signal processing unit for processing a reception signal, the reception signal processing unit having a reception signal processing interface unit for a network configuration, and a transmission signal processing interface for a network configuration, a part thereof. Line switching unit for processing a transmission signal, and a line switching interface unit for network configuration in a part thereof, for switching connection between the reception signal processing unit and the transmission signal processing unit. East-side optical communication device, comprising a receiving signal processing interface unit for network configuration in a part thereof, a receiving signal processing unit for processing the received signal, and a part thereof for the network configuration A transmission signal processing unit that has a transmission signal processing interface unit and processes a transmission signal, and has a line switching interface unit for network configuration in a part thereof,
A west side optical communication device, comprising: a reception signal processing unit; and a line switching unit for switching connection between the reception signal processing unit and the reception signal processing interface unit of the east side optical communication device. Between the line switching interface of the optical communication device, between the transmission signal processing interface of the east optical communication device and the line switching interface of the optical communication device, A cable is connected between the processing interface and the line switching interface of the east optical communication device, and between the transmission signal processing interface of the west optical communication device and the line switching interface of the east optical communication device. The configuration is as follows.

A third aspect of the present invention is the configuration according to the second aspect, wherein the east side optical communication device and the west side optical communication device are independent of each other, and each have a built-in fan for forced air cooling. In addition, the reception signal processing interface unit, the transmission signal processing interface unit, and the line switching interface unit are configured on the back side, and the east side optical communication device and the west side optical communication device are a single unit. The upper and lower frames are attached side by side, and a cable connecting the respective interface units extends to the rear side, and the entire rear side of the east side optical communication device and the rear side of the west side optical communication device The entire structure is covered with a back cover.

According to a fourth aspect of the present invention, in the first, second or third aspect, each of the interface units has an information transmission capacity of 1.
This is a configuration including a shroud that can connect a plurality of 2 Gbsp cables side by side. According to a fifth aspect of the present invention, the east side optical communication device and the west side optical communication device are arranged such that the former is positioned above and the latter is positioned below, and dispersion compensation is performed above the east side optical communication device. It is configured to further include a device.

According to a sixth aspect of the present invention, a plug-in type dispersion compensator is further provided. According to a seventh aspect of the present invention, there is provided the optical communication device according to the first aspect, further comprising an optical adapter mounting bracket, wherein the optical adapter mounting bracket is an optical adapter to which a connector at an end of an optical fiber is connected. The configuration is such that optical adapters with equal intervals are attached.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with headings.
The order of the headings is as follows. I Summary of the Invention II Electrical Structure of Optical Communication Device 40 III Mechanical Structure of Optical Communication Device 40 IV Mechanical Structure of Interface Unit V Mechanical Structure of Connector Connected to Interface Unit VI Connection State of Connector to Interface Unit VII Four-node, terminal equipment 50 of four-fiber BLSR system 20 VIII Four-node, relay equipment 60 of four-fiber BLSR system 20 IX Four-node, terminal equipment 70 of two-fiber BLSR system 10 X4 node, four-fiber BLSR system Configuration of Twenty Different Terminal Devices 70A XI Optical Transmitter Plug-in Unit TC The following is a description along the headings.

I. Outline of the Invention FIG. 1 shows an outline of the present invention. The optical communication device 40 shown in FIG. 1A, which is a main part of the present invention, has a structure shown in FIG.
In addition to having the function of constructing the terminal device of the node and the two-fiber BLSR system 10, the function of constructing the terminal device of the four-node and four-fiber BLSR system 20 shown in FIG. Has the function of constructing

FIG. 1D shows a four-node, two-fiber BLS.
1 shows a terminal device 70 of an R system 10. This terminal device 7
Reference numeral 0 denotes a structure in which one optical communication device 40 is attached to the open rack 71. FIG. 1B shows a terminal device 50 of a four-node, four-fiber BLSR system 20. The terminal device 50 is provided with two optical communication devices 40E and 40W mounted in an open rack 51 in a vertically stacked arrangement, and a shield cable 160 is provided between the upper and lower optical communication devices 40E and 40W on the rear side. It is a structure connected appropriately.

FIG. 1C shows a four-node, four-fiber BLS.
1 shows a relay facility 60 of the R system 20. In the relay equipment 60, two optical communication devices 40E and 40W are mounted on an open rack 61 in a vertically stacked arrangement, and a shielded cable 160 is appropriately connected in the same optical communication device on the rear side. It is a structure consisting of

As described above, the optical communication device 40 can change the current four-node, two-fiber B
It has the feature that it can be applied not only to the terminal equipment of the LSR system 10 but also to the terminal equipment of the future 4-node, 4-fiber BLSR system 20. II Electrical Structure of Optical Communication Device 40 FIGS. 3 to 7 show the mechanical structure of the optical communication device 40,
FIG. 2 shows an electrical structure of the optical communication device 40.

For convenience of explanation, first, the electrical structure will be described. As shown in FIG. 2, the optical communication device 40 generally includes a first system 80, a second system 81, and a plurality of interface units 90, 91, and WOR which form a main part of the present invention.
K, PTCT, etc.

The first system 80 includes a reception signal processing section 83-1 for processing a reception signal, and a line switching section 84-1 for switching connection between the reception signal processing section 83-1 and the transmission signal processing section 85-1. When,
The transmission signal processing unit 85-1 processes a transmission signal. The second system 81 is substantially the same as the first system 80, and includes a reception signal processing unit 83-2, a line switching unit 84-2,
It comprises a transmission signal processing section 85-2.

Each of the reception signal processing units 83-1 and 83-2 includes an optical reception unit plug-in unit RC and a reception signal processing unit plug-in unit DM. Transmission issue processing unit 85-
Reference numerals 1 and 85-2 each include a transmission signal processing unit plug-in unit MX and an optical transmission unit plug-in unit TC.
Each of the line switching units 84-1 and 84-2 includes four line switching unit plug-in units MM.

The receiving signal processing units 83-1 and 83-2 and the transmitting signal processing units 85-1 and 85-2 are connected to a working optical fiber or a standby optical fiber. The line switching units 84-1 and 84-2 perform line switching in the time slot system within the LSI (311M × 4).
Perform in 2G units.

The plurality of interface units are connected to a reception signal processing interface unit (both not shown) connected to the reception signal processing units 83-1 and 83-2 by a wiring pattern 86 in the back board 132, respectively. Switching section 84-
1 and 84-2, and line switching interface units WORK and P connected to transmission signal processing units 85-1 and 85-2.
TCT and so on.

The optical communication device 40 has an optical receiving unit plug-in unit RC, an optical transmitting unit plug-in unit TC, and the like at the lower stage. The optical communication device 40 transmits information of 51 Mbsp to 192 channels, ie, 192 channels, so that it can correspond to the 4-node, 4-fiber BLSR system 20 of FIG. 34B).
It is configured to have the capability of processing 51 Mbsp × 192 = 10 Gbsp information.

Each of the interface sections 90 is connected to a shielded cable 160 to be described later. This cable has information of 24 channels per cable, that is, 51 Mbsp × 24 = 1.2 in consideration of the connector.
It has the ability to transmit Gbsp information. Each of the interface units 90 etc. is also 1.2 Gb
It has the ability to transmit sp information.

Here, the reason that each interface unit 90 and the like and each shield cable 160 have the ability to transmit 1.2 Gbsp information is that the information that each interface unit 90 and the like and each shield cable 160 can transmit is transmitted. , 1/8 of the information that can be processed by the optical communication device 40, specifically 1/8,
This is because it is not necessary to make the leading end of the fork bifurcated.

III. Mechanical Structure of Optical Communication Device 40 As shown in FIGS. 3, 4 and 5, the optical communication device 40 includes an electric fan unit 12 on the bottom of a sheet metal shelf 120.
1. An electric fan unit 122 at the center of the shelf 120, and an OPT terminal board 12 at the top of the shelf 120.
3 and the signal processing unit plug-in unit DM, the signal processing unit plug-in unit MX, and the line switching unit plug-in unit are provided in the space between the electric fan unit 122 and the OPT terminal unit 123 in the shelf 120. The MM is mounted, and the light receiving unit plug-in unit RC, the light transmitting unit plug-in unit TC, and the like are mounted in a space between the electric fan unit 121 and the electric fan unit 122 in the shelf 120.

As shown in FIG. 7, the shelf 120 includes a box-shaped shelf body 131 made of sheet metal and a shelf body 13.
1, a backboard 132 having a laminated printed board structure covering the back side, a front frame portion 133 attached to the front surface of the shelf body 131, and a sheet metal fixed to the shelf body 131 and covering the back surface of the backboard 132. Back cover 134 and mesh plate 135 for suction of air at the bottom
And a mesh plate 136 for blowing air behind the top.
Having a structure consisting of The back cover 134 is slightly separated from the back board 132, and a flat space 137 shielded by the back board 132 is formed between the back board 132 and the back cover 134.

As shown in FIG. 8, a connector 140 is press-fitted and fixed to the back board 132 on the front surface 132a side. The pins 141 protrude from the back surface 132b of the backboard 132 and are arranged vertically and horizontally. When the signal processing unit plug-in unit MX or the like is mounted on the connector 140, the plug 142 at the end in the insertion direction is connected.

Mechanical Structure of IV Interface Unit The optical communication device 40 has an interface unit 90 and the like on the back surface of the back board 132 as shown in FIGS. 8, 9 and 10. The interface section 90 and the like generally include a large number of the pins 141 protruding from the back surface 132b of the back board 132 and a shroud 150 which is tightly fitted and attached to the pins 141 and has three rows ×
In this configuration, a total of 21 pins 141 in seven rows project into respective recesses of the shroud 150 which will be described later.

The shroud 150 is shown in FIG.
As shown in (B), (C), and (D), the connector 161 has a substantially cubic shape and is provided at the end of the shielded cable 160.
Connecting portions 150a-1 to 150a-4 to which are connected
(CN1 to 4) at equal intervals. Each connection part 150a-
1 to 150a-4 are concave portions 150a-1a to 150a-4a into which the convex portion of the connector 161 is fitted, and each concave portion 150a-1a to 150a-4a.
a-1a to 150a-4a, through holes 150a-1b to 150a-4b provided one on each side, and nuts 150a-1c to fixedly provided for each of the through holes 150a-1b to 150a-4b. 150a-4c,
Bottom plate 150 of each recess 150a-1a to 150a-4a
It comprises a large number of holes 150b in a matrix corresponding to the large number of pins 141 of a-1d to 150a-4d.

Adjacent connecting portions 150a-1 to 150a-4
, The portion on the Z1 side from the connection portion 150a-1, and the portion on the Z2 side from the connection portion 150a-4, so that the pin 141 is not bent on the lower surface of the top plate 150c of the shroud 150. A large number of concave supporting recesses 150d for supporting the tips of the pins 141 are formed in a matrix.

The shroud 150 is provided on both sides,
A recess 150e to which a pull-out tool is fitted at the time of repair
Having. In the shroud 150, as shown in FIGS. 10A and 9, the hole 150b is tightly fitted with the pin 141, and the pin 141 penetrates the bottom plate 150a-1d and the like and is inserted into the recess 150a-1a and the like. It is attached to the back surface of the backboard 132 in a protruding state and in a state where the top plate 150c is covered with the back cover 134 except for the recesses 150a-1a and the like. The shroud 150 is attached to the back surface of the backboard 132 and is provided in a shielded flat space 137 between the backboard 132 and the back cover 134.

The rear cover 134 has a rectangular window 134a and a circular hole 134b corresponding to the recesses 150a-1a and the like of the shroud 150 and the through holes 150a-1b. The rectangular window 134a faces the concave portions 150a-1a and the like, and the circular holes 134b correspond to the through holes 150a-1b.

The connection portion 150a-
As shown in FIG. 11 (D), the pins 141 that are out of the range from 1 to 150a-4 are fitted into the support recesses 150d as shown in FIG. 11D so as not to bend unnecessarily. The individual connection parts 150a-1 to 150a-4 (CN1-
4) consists of a total of 21 pins 141 of 3 rows × 7 columns,
It has the ability to transmit information of 311 Mbsp × 4 = 1.2 Gbsp. As shown in FIG. 12, thirteen pins 141 are regularly arranged with thirteen signal grounds (SGs) for high-speed transmission.
4 data of 1Mbsp (DATA1 to 4) and CL
In this configuration, two KLMs (CLK1, 2) and two ALM lines are arranged.

Mechanical Structure of Connector Connected to V Interface As shown in FIGS. 12, 13 and 8, etc., the connector 161 at the end of the shielded cable 160 is
2, housing upper half 163, housing lower half 16
4 and a pair of connecting screws 165.

The connector body 162 has a total of 2 rows of 3 rows × 7 columns.
One female terminal 166 is formed side by side in a matrix, and has a shield plate 167 on the upper and lower surfaces and a shield plate 168 with holes on the left and right side surfaces. The configuration of the classification of the 21 female terminals 166 is a total of 21 × 3 rows × 7 columns of the connection portion 150a-1 (CN1).
It has the same configuration as the pin 141 of the book.

The sheathed cable 169 in the shielded cable 160 is connected to the female terminal 166 of the connector main body 162. The connector body 162 is sandwiched between the upper housing half 163 and the lower housing half 164 together with a pair of connection screws 165. Housing upper half 16
3 and the lower housing half 164 are screwed together with screws (not shown). The shield cable 160 is pulled out from the connector 161. Upper half of housing 1
63 and the lower housing half 164 are both metal-plated synthetic resin molded parts.

Connector 161 and shielded cable 16
0 is configured to have the ability to transmit 1.2 Gbsp information. Since the connector main body 162 has directionality, it cannot be accommodated between the housing upper half 163 and the housing lower half 164 in the opposite direction by the notch 162a of one corner portion, but only in a predetermined direction. It is designed to fit between the upper housing half 163 and the lower housing half 164. This prevents erroneous assembly.

The connection state of the connector to the VI interface portion As shown in FIGS. 8, 9, and 10A and 10B,
The connector 161 at the end of the shielded cable 160 has a rectangular shape
Into the recesses 150a-1a, and a pair of connecting screws 165 are inserted into the through holes 150a-1b and the like through the circular holes 134b of the back cover 134, and the nut 15
0a-1c and the like, mechanically connected to the shroud 150, and each female terminal 166 is fitted and electrically connected to the corresponding pin 141.

Here, in order to prevent the connector 161 from being connected upside down, as shown in FIG.
The following two structures are adopted. On the side surface of the connector main body 162, high ribs 170 and low ribs 171 are alternately formed in a vertically asymmetric relationship. Guide grooves 172 are formed on both side surfaces of the concave portions 150a-1a in a vertically asymmetric manner.

The connection screw 165 is connected to the connector body 16.
2 is shifted from the center by a dimension δ. Through hole 142a
-1b is also shifted upward by a dimension δ from the center of the recesses 142a-1a. Therefore, when the connector 161 is to be connected upside down, the ribs 170 and 171 do not fit into the guide grooves 172, and the connector 161 is not connected.
When the connector 161 is inserted in the correct direction, the ribs 170 and 171 fit into the guide grooves 172, and the connector main body 162 is inserted into the recesses 150a-1a, and
The connection screw 165 is inserted into the through holes 142a-1b,
Connector 161 is connected to connection part 150a-1.

As shown in FIG. 15, four connectors 161 are connected to the interface section 90 and the like in a vertical line. As shown in FIG. 16, the interface unit 90A includes two connection units 150Aa-1 and 150Aa-
In the case of a configuration having 2, as shown in FIG.
The connectors 161 are connected vertically.

VII Terminal device 50 of 4-node, 4-fiber BLSR system 20 FIG. 17, FIG. 18 and FIG.
1 shows a terminal device 50 of the LSR system 20. The terminal device 50 is installed in each station of the four-node, four-fiber BLSR system 20, and the two optical communication devices 40E and 40W are mounted on the open rack 51 in a vertically stacked arrangement. 8 dispersion compensating devices 180-1
~ 180-8 are provided side by side in two units in four layers,
On the rear side, the upper and lower optical communication devices 40-1 and 40-2 are appropriately connected by a shielded cable 160, and four optical fibers (two current optical fibers W1 and W2) are connected.
1 and two spare optical fibers P1 and P1).

The dispersion compensating devices 180-1 to 180-8
Is provided for transmitting information at an ultra-high speed of 10 Gbsp. The upper optical communication device 40E is called an east optical communication device, and the lower optical communication device 40W is called a west optical communication device. Parts constituting the east side optical communication device are denoted by a suffix E, and portions constituting the west side optical communication device are denoted by a suffix W.

The shielded cable 160 is shown in FIGS.
21. As shown in FIG. 21, the plug 161 at one end is connected to the interface unit 90E of the east optical communication device 40E, and the plug 161 at the other end is connected to the west optical communication device 4E.
0W interface unit 90W etc., and
It is arranged along the outer surface of the open rack 51. The connection is
Basically, the same channel of the east side optical communication device 40E and the west side optical communication device 40W are connected to the line switching unit 84.
LSI of E-1, 84E-2, 84W-1, 84W-2
(SW).

The shielded cable 160 includes four shielded cable groups 160-1, 160-2, 160-3, 1
The connection is roughly classified as 60-4. FIG. 21 schematically shows the connection. First shielded cable group 160-1 Transmission signal processor 85E- of east side optical communication device 40E
1, 85E-2 (Transmission signal processing unit plug-in unit M
X) Working eight interface units WORK (51)
Mbps × 24CH = 1.2 Gbps) and 8 for spare
Interface unit PTCT (51Mbps × 24)
CH = 1.2 Gbps) and the west side optical communication device 40
Between the transmission interface unit 91W of the line switching units 84W-1 and 84W-2 (line switching unit plug-in unit MM) of W The second shielded cable group 160-2 The line switching unit 84E of the east side optical communication device 40E -1,
84E-2 (line switching unit plug-in unit MM) for transmission, and transmission signal processing units 85W-1 and 85W-2 (transmission signal processing unit plug-in unit MX) of the west side optical communication device 40W. Between eight working interface parts WORK and eight working part PTCT for protection Third shielded cable group 160-3 Received signal processing section 83E- of east side optical communication device 40E
1, 83E-2 (received signal processing unit plug-in unit D
M), eight working interface parts WORK and eight spare PTCT interface parts, and the line switching parts 84W-1 and 84W- of the west-side optical communication device 40W.
2 (line switching unit plug-in unit MM) between the receiving interface unit 90W fourth shielded cable group 160-4 line switching unit 84E-1 of the east side optical communication device 40E;
84E-2 (line switching unit plug-in unit MM) and the reception interface unit 91E of the reception signal processing units 83W-1 and 83W-2 (reception signal processing unit plug-in unit DM) of the west side optical communication device 40W. As shown in FIG. 21, two working optical fibers are provided between the east side optical communication device 40E and the west side optical communication device 40W. WK1, WK2 and two spare optical fibers P
1 and P2 are connected.

The terminal device 50 is connected to the east side optical communication device 4.
0E and the waist-side optical communication device 40W are connected as described above by the shielded cable 160, and therefore, as shown by a symbol a in FIG. When the working optical fiber WK1 is cut by mistake, the cut working optical fiber WK1 is automatically switched to the spare optical fiber P1 by a line switch (reception end) and relieved. FIG. 35 (B)
If all four optical fibers WK1, WK2, P1, P2 are erroneously cut off from the station, as indicated by reference numeral b, one working optical fiber WK1 is looped back. (→→→) automatically switches to one standby optical fiber P1 and another one of the active optical fibers WK2.
Is automatically switched to another spare optical fiber P2 by loopback (→→→), and all signals are rescued.

As shown in FIGS. 22 (A) and (B), the terminal device 50 is configured such that the east side optical communication device 40E and the west side optical communication device 40W are mechanically independent. This is a structure attached to the open rack 51.
Next, emission of electromagnetic waves will be described. The east-side optical communication device 40E and the west-side optical communication device 40W have independent configurations, and each has a structure in which the emission of electromagnetic waves is sufficiently suppressed by being shielded. Therefore, the terminal device 5
0 has a structure in which emission of electromagnetic waves is sufficiently suppressed.

Next, forced air cooling will be described. Regarding the east side optical communication device 40E, the electric fan unit 121E and the electric fan
22E is driven to generate air 300E.
As shown in the figure, the signal passes through the east-side optical communication device 40E, and passes through the signal processing unit plug-in unit DM, the signal processing unit plug-in unit MX, the line switching unit plug-in unit MM, the optical reception unit plug-in unit RC, and the optical transmission unit. The plug-in unit TC and the like are forcibly air-cooled. Looking at the west side optical communication device 40W, the electric fan unit 121W and the electric fan unit
As a result, air passes through the west-side optical communication device 40W as indicated by the reference numeral 300W, and the signal processing unit plug-in unit DM, the signal processing unit plug-in unit MX, the line switching unit plug-in unit MM,
The optical receiving unit plug-in unit RC, the optical transmitting unit plug-in unit TC, and the like are forcibly air-cooled. Thus, the east side optical communication device 40E and the west side optical communication device 40W
Is independently and well forced air cooled. The dispersion compensating device assembly 18 is provided above the east optical communication device 40E.
Even when 5-1 to 185-4 are provided, the east-side optical communication device 40E and the west-side optical communication device 40W are independently and forcibly air-cooled satisfactorily.

Next, the dispersion compensation devices 180-1 to 180-18
0-8 will be described. The dispersion compensating device is an optical receiving unit plug-in unit R of the east side optical communication device 40E.
C1 and a dispersion compensating device 180-1 connected by an optical fiber 181-1;
Dispersion compensating device 1 connected to the optical receiver plug-in unit RC2 of OE and the optical fiber 181-2
80-2, a dispersion compensating device 180-3 connected to the optical transmission unit plug-in unit TC-1 of the east side optical communication device 40E and the optical fiber 181-3, and an optical transmission unit of the east side optical communication device 40E. The dispersion compensation device 180-4 connected to the plug-in unit TC-2 by the optical fiber 181-4, and the optical receiver plug-in unit RC1 of the west optical communication device 40W and the optical fiber 181-5 are connected. The dispersion compensating device 180-5, the optical receiving unit plug-in unit RC2 of the west side optical communication device 40W, and the optical fiber 181-6.
Compensation device 180-6 connected by
A dispersion compensating device 180-7 connected by an optical fiber 181-7 to the optical transmission unit plug-in unit TC-1 of the west optical communication device 40W; and an optical transmission plug-in unit of the west optical communication device 40W. TC-
2 and a dispersion compensating device 180-8 connected by an optical fiber 181-8.

The optical fibers 181-1 to 181-8 extend in the Z1 and Z2 directions along the open rack 51 in the columnar space 182 immediately in front of the open rack 51, as shown in FIG. doing. Further, as shown in FIG. 24, two dispersion compensating devices are arranged side by side, and are accommodated in a flat case 183. The front side of the case 183 is closed by a front cover 184, and the dispersion compensating device is Unnecessary escape. This is called a dispersion compensation device assembly 185. The open rack 51 includes four dispersion compensation device assemblies 185-1 to 185.
-4 is mounted.

Each dispersion compensating device 180 has the structure shown in FIG.
As shown in (A), (B), and (C), a cylindrical aluminum bobbin 191 is provided in a case 190, and the bobbin 191 has a dispersion compensating fiber 1 having a length of several tens km.
92 is wound in the clockwise direction C, the end portion of the dispersion compensating fiber 192 is bent back half a turn in the counterclockwise direction CC, and the entrance-side optical adapter 1
94 and an outlet-side optical adapter 196. The connector 193 at the beginning of the dispersion compensating fiber 192 is connected to the entrance-side optical adapter 194, and the connector 195 at the end of the dispersion compensating fiber 192 is connected to the exit-side optical adapter 196. The bending R of the dispersion compensating fiber 192 is set to a size that does not impair the optical transmission characteristics.

In relation to the dispersion compensating devices being arranged side by side, the case 190 has a shape having a concave portion 190a in the front right half and forms the contour of the concave portion 190a. An entrance-side optical adapter 194 and an exit-side optical adapter 196 are provided so as to extend in the X1 and X2 directions on a surface 190b extending from the front surface in the Y1 direction.

Consider two dispersion compensating devices 180-1 and 180-2 arranged on the left and right shown in FIG. First,
Consider the dispersion compensation device 180-1 located on the left side. The connector 186 at the tip of the optical fiber 181-1 is
Space 1 in concave portion 190a of dispersion compensation device 180-1
In the state of being accommodated in the inside 97, it is connected to the entrance side optical adapter 194 and the exit side optical adapter 196. Optical fiber 1
81-1 extends from the portion connected to the optical adapters 194 and 196 in the X1 direction without being bent particularly in a substantially linear state, and passes through the front surface of the adjacent dispersion compensating device 180-2 to extend along the holder 198. And further extends to the position of the open rack 51 in the X1 direction.

Next, the dispersion compensation device 18 located on the right side
Let's look at 0-2. The connector 186 at the tip of the optical fiber 181-2 is connected to the concave portion 1 of the dispersion compensating device 180-2.
It is connected to the entrance-side optical adapter 194 and the exit-side optical adapter 196 while being accommodated in the space 197 within 90a. The optical fiber 181-2 is connected to the optical adapters 194 and 196.
From the portion connected to the open rack 51 in the X1 direction without being bent particularly in a substantially linear state, and extends to the portion of the open rack 51. As described above, the connector 186 and the optical fibers 181-1 and 181-2 are connected to the dispersion compensating device 180.
-1 and 180-2, and are arranged so as not to protrude forward, so that the dispersion compensating device assembly 185-1 includes Y1 and Y2.
2 has a short depth dimension. Also, of the optical fibers 181-1 and 181-2, the dispersion compensating device 18
The optical transmission characteristics of the portions drawn from 0-1 and 180-2 are not impaired at all. This is true for other dispersion compensating device assemblies 185-3 to 185-8.

VIII Four-Node, Four-Fiber BLSR System 20 Relay Facility 60 FIG. 26 shows a four-node, four-fiber BLSR system 20 relay facility 60. The relay equipment 60 is provided in the open rack 61 with the optical communication devices 40E and 40W.
Are mounted in a vertically stacked arrangement, and a dispersion compensation device assembly 185 is mounted on the top. As shown in FIG. 27, on the rear side, the shielded cable 160 is connected across the line switching unit between the interface unit of the reception signal processing unit and the interface unit of the transmission signal processing unit of the optical communication device 40E. I have. Similarly, also in the optical communication device 40W, the shielded cable 160 is connected between the interface unit of the reception signal processing unit and the interface unit of the transmission signal processing unit across the line switching unit. For each of the optical communication devices 40E and 40W, the interface unit of the line switching unit to which the shield cable 160 is not connected is a shield cover 200,
201, the electromagnetic radiation from the interface is suppressed.

IX Terminal Device 70 of Four-Node, Two-Fiber BLSR System 10 FIG. 28 shows a terminal device 70 of a four-node, two-fiber BLSR system 10. The terminal device 70 has a configuration in which one optical communication device 40 is mounted on an open rack 71 and a dispersion compensation device assembly 185 is mounted on the top.

As shown in FIG. 29, no shielded cable is connected to the rear side of the terminal device 70, and all the interface portions are shielded covers 205, 206,
07. Shield cover 205, 20
6, 207 are fixed by screwing a screw 208 to a nut 150a-1c or the like in the shroud 150. Structure.

Another terminal device 50A of the X4 node, 4-fiber BLSR system 20 The terminal device 50A shown in FIG. 30 has the same function as the terminal device 50 shown in FIG. The terminal device 50A is different from the terminal device 50 in that the dispersion compensation device is a plug-in type. Optical communication device 40EA and optical communication device 40WA
Have a plug-in type dispersion compensation device 210. The terminal station device 70A has a configuration in which an optical communication device 40EA and an optical communication device 40WA are arranged vertically.
In this configuration, the dispersion compensator is not provided on the top.

Each optical communication device 40EA and the optical communication device 40W
Since the dispersion compensating device 210 is provided in A, there is no need to draw the optical fiber out of the optical communication devices 40EA and 40WA, and thus the wiring of the optical fiber is simplified. Further, as shown by reference numeral 211, the extra length processing of the optical fiber is performed in the space of each OPT terminal unit 123, that is, in the optical communication devices 40EA and 40WA.

XI Configuration of Optical Transmitter Plug-in Unit TC As shown in FIGS. 31 and 32, the optical transmitter plug-in unit TC has a three-story structure, in which the circuit board 220 on the first floor and the second floor are connected. And an optical amplifier 222 on the third floor. Optical amplifier 222
Are fixed on a circuit board 223. This circuit board 2
A plurality of tongues 224 of sheet metal are formed upright at the edge of 23. The optical fiber 225 extending over the second-floor portion and the third-floor portion is subjected to auxiliary extra length processing by selecting a tongue portion 224 to be hooked.

An optical adapter mounting bracket 230 is fixed on the circuit board 223. Three optical adapters are mounted side by side on the optical adapter mounting bracket 230, and the connector at the end of the optical fiber is an optical adapter. Connected from both sides. Optical transmitter plug-in unit T
C may have a configuration in which the optical amplifier 222 on the third floor is separated. In this case, the use of the optical amplifier can be selected, and the optical amplifier may be incorporated only in a system requiring optical amplification.

Here, the optical adapter mounting bracket 230 and parts related thereto will be described. FIGS. 33A to 33C show the SC-SC optical adapter 240 and the ST-SC
The optical adapter 241 and the FC-SC optical adapter 242 are shown. The SC is a type that is connected simply by inserting a connector. ST is a format in which a connector is inserted and turned to be connected. FC is a type that is connected by screwing a connector.

Each of the above optical adapters 240, 241, 24
In No. 2, the dimension C between the pair of mounting holes 243 is equal, and the thickness t of the bracket 244 in which the mounting holes 243 are formed is equal. The optical adapter mounting bracket 230 has three optical adapter mounting portions 230a, 230b, 230c side by side. Each optical adapter mounting part 230a, 230
b, 230c are notches 230a-1, 230b-1,
230c-1 and a pair of screw holes 230 on both sides of each notch.
a-2, 230b-2, and 230c-2. The dimension between the pair of screw holes is C, which is the same as the dimension C between the pair of mounting holes 243.

Therefore, any optical adapter can be attached to any optical adapter attaching portion by the screw 232. This makes it possible to adapt to any telephone company system by appropriately replacing the optical adapter.

FIGS. 33 (B), (C), (E), (F)
Shows the case where the optical adapter is replaced. The optical receiving unit plug-in unit RC can also be configured in the same manner as described above.

[0066]

As described above, according to the first aspect of the present invention,
The reception signal processing unit has a configuration having a reception signal processing interface unit for network configuration in a part thereof, and the transmission signal processing unit has a configuration having a transmission signal processing interface unit for network configuration in a part thereof, and The line switching unit has a configuration having a line switching interface unit for network configuration in a part thereof, and a cable connection is made between the reception signal processing interface unit, the transmission signal processing interface unit, and the line switching interface unit. By using this optical communication device as a basic unit, one or a plurality of them are combined, and an appropriate cable connection is made between the interface units, whereby an optical communication device having different specifications can be constructed. That is, various applications can be flexibly constructed, and the cost of the communication system can be significantly reduced as compared with the related art in which a dedicated optical communication device is prepared for each communication system.

According to the second aspect of the present invention, the east side optical communication device and the west side optical communication device are provided, and the reception signal processing interface portion of the east side optical communication device and the line switching interface portion of the west side optical communication device are provided. Between the transmission signal processing interface of the east optical communication device and the line switching interface of the west optical communication device, and between the reception signal processing interface of the west optical communication device and the line switching of the east optical communication device. Since the cable is connected between the interface unit and the transmission signal processing interface unit of the west optical communication device and the line switching interface unit of the east optical communication device, they are substantially the same. With a low-cost facility comprising two optical communication devices, for example, a signal transmission speed of 1 Gbsp and an ultra high-speed, four-node, can be realized the optical communication apparatus installed at each station 4 fiber BLSR system.

According to the third aspect of the present invention, the east side optical communication device and the west side optical communication device are independent,
It is a configuration that incorporates a fan for forced air cooling,
In addition, the reception signal processing interface unit, the transmission signal processing interface unit, and the line switching interface unit are provided on the back side, and the east side optical communication device and the west side optical communication device are a single frame. The cables connecting the interface sections extend to the rear side, and the entire rear side of the east side optical communication device and the entire rear side of the west side optical communication device are respectively Since the structure is covered with the back cover, it is possible to realize an optical communication device capable of sufficiently performing forced air cooling and sufficiently suppressing electromagnetic radiation.

According to the fourth aspect of the present invention, since each interface section is constituted by a connector shroud capable of connecting a plurality of cables each having an information transmission capacity of 1.2 Gbsp, the signal transmission speed is as high as 10 Gbsp. It is only necessary to connect one end of each cable to a certain communication device without branching the end of the cable into two, thereby simplifying the connection of the cable.

According to the fifth aspect of the present invention, since the configuration is provided with the dispersion compensating device above, the two communication devices are accommodated in the rack while securing a ventilation path for cooling. In addition, it is possible to realize a communication device having a very high signal transmission speed of 10 Gbsp. According to the sixth aspect of the present invention, since the configuration further includes the plug-in type dispersion compensating device, the optical communication device itself has the configuration including the dispersion compensating device, and the optical fiber is compared with the case where the dispersion compensating device is externally attached. Wiring can be simplified.

According to the seventh aspect of the present invention, there is provided an optical adapter having an optical adapter mounting bracket to which a connector at an end of an optical fiber is connected, wherein the mounting holes are equally spaced. , The optical adapter according to the type of the connector used can be attached without replacing the optical adapter mounting bracket, and the optical communication apparatus can be easily connected to the existing communication system.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of the present invention.

FIG. 2 is a block diagram of the optical communication device in FIG.

FIG. 3 is a diagram illustrating the optical communication device in FIG. 1;

4 is a diagram of the optical communication device of FIG. 3 as viewed from the front side and the back side.

FIG. 5 is a perspective view of the optical communication device of FIG. 3 with the back cover removed, as viewed from the back side.

FIG. 6 is a perspective view of the optical communication device of FIG. 3 as viewed from the back side.

FIG. 7 is a schematic diagram of a shelf of the optical communication device of FIG. 3;

FIG. 8 is a diagram illustrating a structure of an interface unit of the optical communication device of FIG. 3;

FIG. 9 is a diagram illustrating an interface unit.

FIG. 10 is a diagram illustrating an interface unit.

FIG. 11 is a diagram showing a shroud.

FIG. 12 is a diagram illustrating an arrangement of pin types of an interface unit.

FIG. 13 shows a connector.

FIG. 14 is a diagram illustrating prevention of incorrect insertion and connection of a connector.

FIG. 15 is a diagram illustrating connection of a connector.

FIG. 16 is a diagram showing a modification of the interface unit.

FIG. 17 is a perspective view of a terminal device of the four-fiber BLSR system.

FIG. 18 is a perspective view of the terminal device of FIG. 17 as viewed from the rear side.

19 is a configuration diagram of the terminal device of FIG. 17;

FIG. 20 is a diagram illustrating cable connection between the east side optical communication device and the west side optical communication device.

FIG. 21 is a block diagram illustrating cable connection between an east side optical communication device and a west side optical communication device.

FIG. 22 is a schematic diagram of the structure of the terminal device of FIG. 17;

FIG. 23 is a diagram illustrating an arrangement of wiring of an optical fiber and a shielded cable.

FIG. 24 is a perspective view showing a dispersion compensation device assembly.

FIG. 25 is a diagram illustrating a dispersion compensation device.

FIG. 26 is a diagram of the relay facility as viewed from the rear side.

FIG. 27 is a block diagram illustrating cable connection between the east side optical communication device and the west side optical communication device.

FIG. 28 is a perspective view of a terminal device of the two-fiber BLSR system.

FIG. 29 is a perspective view of the terminal device of FIG. 28 as viewed from the rear side.

FIG. 30 is a diagram illustrating another terminal device of the four-fiber BLSR system.

FIG. 31 is a perspective view of an optical transmission plug-in unit.

FIG. 32 is an exploded perspective view of the optical transmission plug-in unit of FIG. 31.

FIG. 33 is a diagram showing an optical adapter and an optical adapter mounting bracket.

FIG. 34 illustrates two types of BLSR systems.

FIG. 35 is a diagram illustrating failure recovery of a 4-node, 4-fiber BLSR system.

FIG. 36 is a block diagram of a conventional terminal device.

[Explanation of symbols]

10 Four-node, two-fiber BLSR system 20 Four-node, four-fiber BLSR system 40 Optical communication device 40E East-side optical communication device 40W West-side optical communication device 50, 50A 4-node, four-fiber BLSR system terminal device 51 Open rack 60 Relay equipment 70 4-node, terminal equipment of 2 fiber BLSR system 71 Open rack 80 1st system 81 2nd system 83-1,83-2 Received signal processing unit 84-1,84-2 Line switching unit 85- 1,85-2 transmission signal processing unit 86 wiring pattern RC optical reception unit plug-in unit DM reception signal processing unit plug-in unit TC optical transmission unit plug-in unit MX transmission signal processing plug-in unit MM line switching unit plug-in unit 90 , 91, WORK, PTCT Multiple interface units 12 Shelf 121, 122 Electric fan unit 123 OPT terminal 131 Shelf main body 132 Backboard 134 Back cover 137 Shielded flat space 140 Connector 141 Pin 150 Shroud 150a-1 to 150a-4 Connection 150a-1a to 150a-4a Recess 150a-1b to 150a-4b Through hole 150a-1c to 150a-4c Nut 150a-1d to 150a-4d Bottom plate 150b Many holes in a matrix 160 Shield cable 161 Connector 162 Connector body 163 Upper half of housing 164 Lower half of housing Body 165 A pair of connection screws 166 Female terminals 167, 168 Shield plate 169 Insulated cable in shield cable 160 170 High rib 171 Low rib 172 Guide groove 1 0-1 to 180-8 Dispersion compensation device 181-1 to 181-8 Optical fiber 182 Column-shaped space just in front of open rack 51 183 Flat case 184 Front lid 185-1 to 185-4 Dispersion compensation device assembly 190 Case 190a Right front recess 192 Dispersion compensating fiber 193, 195 Connector 194 Inlet optical adapter 196 Outlet optical adapter 197 Space in recess 190a 198 Holder 200-207 Shield cover 220 Circuit board 221 E / O unit 222 Optical amplifier 224 Multiple tongues 225 Optical fiber 230 Optical adapter mounting bracket 230a, 230b, 230c Optical adapter mounting section 230a-1, 230b-1, 230c-1 Notch 230a-2, 230b-2, 230c-2 A pair of screw holes 232 Flip 240 SC-SC optical adapter 241 ST-SC optical adapter 242 FC-SC optical adapter 243 mounting hole 244 bracket 300E, of 300W forced air cooling air

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hirofumi Imabayashi 4-1-1, Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Katsuya Fujii 4-chome, Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa 1-1 Fujitsu Limited (72) Inventor Tetsuya Takahashi 4-1-1 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture 1-1 1-1 Fujitsu Limited (72) Inventor Masahiro Shioda 4-chome, Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa No. 1 in Fujitsu Limited

Claims (7)

[Claims] 1. A receiving signal processing unit for processing a received signal, a transmitting signal processing unit for processing a transmitting signal, and a line switching unit for switching and connecting the receiving signal processing unit and the transmitting signal processing unit. Become
An optical communication device installed in an optical fiber network station, wherein the reception signal processing unit has a reception signal processing interface unit for network configuration in a part thereof, and the transmission signal processing unit includes: A part having a transmission signal processing interface unit for network configuration; and a part having the line switching unit having a line switching interface unit for network configuration; An optical communication device, wherein a cable is connected between the signal processing interface unit and the line switching interface unit. 2. A part thereof includes a reception signal processing interface unit for network configuration, a reception signal processing unit for processing a reception signal, and a part thereof includes a transmission signal processing interface unit for network configuration, A transmission signal processing unit for processing a transmission signal, and a line switching interface unit for switching connection between the reception signal processing unit and the transmission signal processing unit, having a line switching interface unit for network configuration in a part thereof. An optical communication device on the east side, a reception signal processing unit for processing a reception signal having a reception signal processing interface unit for a network in a part thereof, and a transmission signal processing interface unit for a network configuration in a part thereof A transmission signal processing unit for processing a transmission signal, and a part thereof having a line switching interface unit for network configuration, and disconnecting the reception signal processing unit and the transmission signal processing unit. A west side optical communication device, comprising: a line switching unit to be connected; and a west side optical communication device between the reception signal processing interface unit of the east side optical communication device and the line switching interface unit of the west side optical communication device. Between the transmission signal processing interface of the east side optical communication device and the line switching interface of the west side optical communication device, the reception signal processing interface of the west side optical communication device and the line switching interface of the east side optical communication device An optical communication device, wherein a cable is connected between the transmission signal processing interface of the west optical communication device and the line switching interface of the east optical communication device. 3. The optical communication device according to claim 2, wherein the east-side optical communication device and the west-side optical communication device are independent from each other, each have a built-in fan for forced air cooling, and A signal processing interface unit, a transmission signal processing interface unit, and a line switching interface unit on the back side, and the east side optical communication device and the west side optical communication device are vertically arranged in a single frame. The cable connecting between the interface units extends to the rear side, and the entire back side of the east side optical communication device and the entire rear side of the west side optical communication device are back covers. An optical communication device, wherein the optical communication device is configured to be covered with: 4. The optical communication device according to claim 1, wherein each interface unit is configured by a shroud that can connect a plurality of cables each having an information transmission capacity of 1.2 Gbsp. 5. The east-side optical communication device and the west-side optical communication device are arranged such that the former is positioned above and the latter is positioned below, and a dispersion compensator is provided above the east-side optical communication device. 3. The optical communication device according to claim 2, further comprising a configuration. 6. The optical communication device according to claim 1, further comprising a plug-in type dispersion compensation device. 7. The optical communication device according to claim 1, further comprising an optical adapter mounting bracket, wherein the optical adapter mounting bracket is an optical adapter to which a connector at the tip of an optical fiber is connected, and a distance between mounting holes is set. An optical communication device, wherein equal optical adapters are mounted.